USVI Public Records

Document text

Water Resources Data Puerto Rico and the U.S. Virgin Islands Water Year 1998 Isla de Vieques Isla de Culebra St. Thomas St. John I P U E R T O R I C O St. Croix I Prepared in cooperation with the Commonwealth of U.S. Department of the Interior Puerto Rico, the Government of the U.S. Virgin Islands, U.S. Geological Survey and with other agencies U.S. Department of the Interior U.S. Geological Survey Water Resources Data Puerto Rico and the U.S. Virgin Islands Water Year 1998 By Pedro L. Díaz, Zaida Aquino, Carlos Figueroa-Alamo, Ricardo J. Vachier, and Ana V. Sánchez Water-Data Report PR-98-1 Prepared in cooperation with the Commonwealth of Puerto Rico, the Government of the U.S. Virgin Islands, and with other agencies U.S. DEPARTMENT OF THE INTERIOR BRUCE BABBITT, Secretary U.S. GEOLOGICAL SURVEY Charles G. Groat, Director For additional information on the water resources investigation programs in Puerto Rico and the U.S. Virgin Islands write to: Chief, Caribbean District, Water Resources Division U.S. Geological Survey GSA Center, 651 Federal Drive Suite 400-15 Guaynabo, Puerto Rico 00965 Telephone: (787) 749-4346 1999 III PREFACE This annual hydrologic data report of Puerto Rico and the U.S. Virgin Islands is one of a series of annual reports that document hydrologic data gathered from the U.S. Geological Survey’s surface- and ground-water data-collection networks in each state, Puerto Rico, the U.S. Virgin Islands, and the other Trust Territories. These records of streamflow, ground-water levels, and quality of water provide the hydrologic information needed by state, local, and Federal agencies, and the private sector for developing and managing our Nation’s land and water resources. The report is the culmination of a concerted effort by dedicated personnel of the U.S. Geological Survey, Water Resources Division, who collected, compiled, analyzed, verified, and organized the data, and who typed, edited, and assembled the report. In addition to the authors, who had primary responsibility for assuring that the information contained herein is accurate, complete, and adheres to the U.S. Geological Survey policy and established guidelines, the Caribbean District would like to acknowledge Heriberto Torres-Sierra, Surface-Water Specialist, for his dedication and long hours of hard work. With the help of the Hydrologic Studies Section, he determined peak discharges for the Hurricane Georges floods. The following personnel contributed significantly to the collection, processing and tabulations of the data: José M. Agis George Arroyo Gregory Cherry Iris M. Concepción Israel Cruz Angel G. Ferrer Robert Fitzhugh Wilfredo García Hector Guardiola Evelyn S. Guevara Senén Guzmán-Ríos Felipe Hernández Sandra Lagares José Merced Carlos Narvaez Victoria Nuñez Rafael Peña-Cortez Ronald T. Richards Carlos C. Rodríguez Julio A. Rodríguez Miguel Rodríguez Rafael M. Rodríguez José René Sánchez Luis Santiago-Rivera Carlos Santos Luis Soler Angel Torres James Torres José A. Torres Ahmed Valencia Luis Vega Ruth I. Guzmán typed the text of the report. Francisco Maldonado prepared the illustrations. This report was prepared in cooperation with agencies of the Commonwealth of Puerto Rico, the Government of the U.S. Virgin Islands, and with other federal agencies under the general supervision of Rafael W. Rodríguez, District Chief, Caribbean District, San Juan, Puerto Rico. REPORT DOCUMENTATION PAGE Form Approved OMB No. 0704-0188 Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden, to Washington Headquarters Services, Directorate for Information Operations and Reports, 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302, and to the Office of Management and Budget, Paperwork Reduction Project (0704-0188), Washington, DC 20503. 1. AGENCY USE ONLY (Leave blank) 2. REPORT DATE July 28 , 1999 3. REPORT TYPE AND DATES COVERED Annual - October 1, 1997 to September 30, 1998 4. TITLE AND SUBTITLE Water Resources Data for Puerto Rico and the U.S. Virgin Islands Water Year 1998 5. FUNDING NUMBERS 6. AUTHOR(S) Pedro L. Díaz, Zaida Aquino, Carlos Figueroa-Alamo, Ricardo J. Vachier, Ana V. Sánchez 7. PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES) U.S. Geological Survey, Water Resources Division GSA Center, 651 Federal Drive, Suite 400-15 Guaynabo, Puerto Rico 00965 8. PERFORMING ORGANIZATION REPORT NUMBER USGS-WDR-PR-98-1 9. SPONSORING / MONITORING AGENCY NAME(S) AND ADDRESS(ES) U.S. Geological Survey, Water Resources Division GSA Center, 651 Federal Drive, Suite 400-15 Guaynabo, Puerto Rico 00965 10. AGENCY REPORT NUMBER SPONSORING / MONITORING USGS-WDR-PR-98-1 11. SUPPLEMENTARY NOTES Prepared in cooperation with the Commonwealth of Puerto Rico, the Government of the U.S. Virgin Islands, and other agencies. 12a. DISTRIBUTION / AVAILABILITY STATEMENT NO RESTRICTION ON DISTRIBUTIONS 12b. DISTRIBUTION CODE 13. ABSTRACT (Maximum 200 words) Water resources data for surface-water, quality-of-water, and ground-water records for the 1998 water year for Puerto Rico and the U.S. Virgin Islands consists of records of discharge, water quality of streams, and water levels of wells. This report contains discharge records for 76 streamflow-gaging stations; daily sediment records for 27 streamflow stations; 99 partial-record or mis­ cellaneous streamflow stations; stage records for 17 reservoirs; water-quality records for 16 streamflow-gaging stations, 42 un- gaged streamsites, 11 lake sites, 2 lagoons, and 1 bay; and water-level records for 97 observation wells. These data represent that part of the National Water Data System collected by the U.S. Geological Survey and cooperating local and federal agencies in Puerto Rico and the U.S. Virgin Islands. 14. SUBJECT TERMS *Surface water, *Water quality, *Ground water, Aquifers, Chemical analysis, Gaging stations, Hydrologic data sediments, Streamflow, Water analysis, Water levels, Lakes 15. NUMBER OF PAGES 646 16. PRICE CODE 17. SECURITY CLASSIFICATION OF REPORT Unclassified 18. SECURITY CLASSIFICATION OF THIS PAGE Unclassified 19. SECURITY CLASSIFICATION OF ABSTRACT 20. LIMITATION OF ABSTRACT NS N 7540-01-280-5500 Standard Form 298 (Rev. 2-89) Prescribed by A NSI S td 239-18 298-102 V CONTENTS Page Preface ....................................................................................................................................................................................... iii List of surface-water and water-quality stations, in downstream order, for which records are published in this volume .......................................................................................................vii List of ground-water wells, by basin, for which records are published in this volume ......................................................................................................................................................xi List of discontinued surface-water discharge or stage-only stations ........................................................................................xiv Introduction..................................................................................................................................................................................1 Cooperation..................................................................................................................................................................................2 Summary of hydrologic conditions..............................................................................................................................................3 Rainfall ..................................................................................................................................................................................3 Surface water .........................................................................................................................................................................3 Ground water .........................................................................................................................................................................6 Water quality .........................................................................................................................................................................9 Special networks and programs ................................................................................................................................................. 10 Explanation of records ............................................................................................................................................................... 10 Station identification numbers............................................................................................................................................. 11 Downstream order system............................................................................................................................................. 11 Latitude-longitude system............................................................................................................................................. 11 Records of stage and water discharge ................................................................................................................................. 19 Data collection and computation................................................................................................................................... 19 Data Presentation .......................................................................................................................................................... 20 Station manuscript .................................................................................................................................................. 20 Data table of daily mean values.............................................................................................................................. 21 Statistics of monthly mean data .............................................................................................................................. 22 Summary statistics .................................................................................................................................................. 22 Identifying estimated daily discharge ........................................................................................................................... 23 Accuracy of the records ................................................................................................................................................23 Records of surface-water quality......................................................................................................................................... 24 Classification of records................................................................................................................................................24 Arrangement of records ................................................................................................................................................24 On-site measurements and sample collection ............................................................................................................... 24 Water temperature......................................................................................................................................................................25 Sediment........................................................................................................................................................................ 25 Laboratory measurements ............................................................................................................................................. 25 Data presentation...........................................................................................................................................................26 Remark codes ................................................................................................................................................................ 27 Records of ground-water levels........................................................................................................................................... 27 Data collection and computation................................................................................................................................... 27 Data presentation...........................................................................................................................................................28 Records of ground-water quality ......................................................................................................................................... 28 Data collection and computation................................................................................................................................... 29 Data presentation...........................................................................................................................................................29 Access to U.S. Geological Survey Water Data.......................................................................................................................... 29 Definition of terms ..................................................................................................................................................................... 30 Publications on Techniques of Water-Resources Investigations ............................................................................................... 40 Surface- and quality-of-water records for Puerto Rico..............................................................................................................45 Discharge at partial-record stations in Puerto Rico ................................................................................................................. 453 Water-quality at partial-record stations in Puerto Rico ........................................................................................................... 471 Ground-water records for Puerto Rico..................................................................................................................................... 483 Surface-water records for U.S. Virgin Islands......................................................................................................................... 605 Ground-water records for U.S. Virgin Islands ........................................................................................................................ 615 Index ........................................................................................................................................................................................ 623 VI ILLUSTRATIONS Page Figure 1. Graphs showing monthly-mean discharge of selected streams in Puerto Rico ....................................................... 4 2. Graphs showing ground-water levels at selected wells in Puerto Rico and the U.S. Virgin Islands....................... 8 3. Map showing location of maximum concentration of fecal coliform bacteria at the water-quality sampling sites in Puerto Rico ...................................................................................................... 12 4. Map showing location of maximum concentration of fecal streptococci bacteria at the water-quality sampling sites in Puerto Rico ...................................................................................................... 13 5. Map showing location of surface-water stations in Puerto Rico ........................................................................... 14 6. Map showing location of water-quality stations in Puerto Rico............................................................................ 15 7. Map showing location of ground-water stations in Puerto Rico ........................................................................... 16 8. Map showing location of surface-water stations in the U.S. Virgin Islands ......................................................... 17 9. Map showing location of ground-water stations in the U.S. Virgin Islands.......................................................... 18 10. Grid showing system for numbering wells and miscellaneous sites (latitude and longitude) .............................. 19 11. Map showing the Río Guajataca basin ................................................................................................................. 47 12. Map showing the Río Camuy basin ...................................................................................................................... 57 13. Map showing the Río Grande de Arecibo basin ................................................................................................... 61 14. Map showing the Río Grande de Manatí basin................................................................................................... 105 15. Map showing the Río Cibuco basin .................................................................................................................... 129 16. Map showing the Río de la Plata basin ............................................................................................................... 139 17. Map showing the Río Hondo to Río Puerto Nuevo basins ................................................................................. 163 18. Map showing the Río Grande de Loíza basin ..................................................................................................... 205 19. Map showing northeastern river basins -- Río Herrera to Río Antón Ruíz basins ............................................. 303 20. Map showing southeastern river basins -- Río Humacao to Quebrada Aguas Verdes ....................................... 341 21. Map showing south coast river basins -- Río Salinas to Río Jacaguas basins .................................................... 361 22. Map showing south coast river basins -- Río Inabón to Río Loco basins .......................................................... 383 23. Map showing the Río Guanajibo basin ............................................................................................................... 417 24. Map showing the Río Yagüez and Río Grande de Añasco basins...................................................................... 433 25. Map showing the Río Culebrinas basin .............................................................................................................. 445 26. Map showing location of low-flow partial-record stations in Comerío, Puerto Rico......................................... 455 27. Map showing location of low-flow partial-record stations in Caguas, Puerto Rico ........................................... 461 28. Map showing location of low-flow partial-record stations in Carolina, Puerto Rico ......................................... 467 TABLES Page Table 1. Island-wide monthly rainfall for the water year 1998 and annual averages for the 30-year reference period, 1961-90 ........................................................................................................................ 3 2. Summary of peak stages and discharges prior to and during September 21-22, 1998, at selected U.S. Geological Survey streamflow gaging stations in Puerto Rico ................................................. 5 3. Highest ground-water level recorded during water year 1998 and previous highest ground-water levels at selected wells in Puerto Rico ........................................................................................... 7 4. Lowest ground-water levels recorded during water year 1998 and previous lowest ground-water levels at selected wells in Puerto Rico ........................................................................................... 7 5. Surface-water quality stations in Puerto Rico with highest concentration of selected constituents during water year 1998 ..................................................................................................................... 9 6. Factors for conversion of chemical constituents in milligrams per liter to milli­ equivalents per liter............................................................................................................................................. 34 VII SURFACE-WATER AND WATER-QUALITY STATIONS, IN DOWNSTREAM ORDER, FOR WHICH RECORDS ARE PUBLISHED IN THIS VOLUME (Letter after station name designates type of data: (d) discharge, (c) chemical, (b) biological, (s) sediment, (p) pesticide, (e) elevation, gage heights) Station number Page RIO GUAJATACA BASIN Río Guajataca at Lares (d,c,b)....................................................................................................... 50010500 48 Lago Guajataca at Damsite near Quebradillas (e) ........................................................................ 50010800 52 Canal Principal de Diversiones at Lago Guajataca (c,b) .............................................................. 50011000 53 Río Guajataca above mouth near Quebradillas (c,b) .................................................................... 50011400 55 RIO CAMUY BASIN Río Camuy near Bayaney (d)........................................................................................................ 50014800 58 RIO GRANDE DE ARECIBO BASIN Lago Garzas near Adjuntas (e) ............................................................................................. 50020100 62 Río Grande de Arecibo near Adjuntas (c,b).................................................................................. 50020500 63 Río Grande de Arecibo below Utuado (d,s).................................................................................. 50024950 65 Río Grande de Arecibo near Utuado (c,b) .................................................................................... 50025000 71 Río Saliente at Coabey near Jayuya (d) ................................................................................ 50025155 73 Río Caonillas at Paso Palma (d,s) ................................................................................................. 50026025 75 Río Caonillas above Lago Caonillas near Jayuya (c,b) ................................................................ 50026050 81 Lago Caonillas at Damsite near Utuado (e) .......................................................................... 50026140 83 Río Grande de Arecibo below Lago Dos Bocas near Florida (c,b) .............................................. 50027250 84 Río Grande de Arecibo above Arecibo (d,s)................................................................................. 50027750 86 Río Tanamá near Utuado (d,c,b,s) ........................................................................................ 50028000 92 Río Tanamá at Charco Hondo (d) ........................................................................................ 50028400 99 Río Grande de Arecibo at Central Cambalache (d,c,b) ................................................................ 50029000 101 RIO GRANDE DE MANATI BASIN Río Orocovis at Orocovis (d)................................................................................................ 50030460 106 Río Orocovis near Orocovis (c,b) ......................................................................................... 50030700 108 Río Grande de Manatí near Morovis (d,c,b) ................................................................................. 50031200 110 Lago El Guineo at Damsite near Villalba (e)........................................................................ 50032290 114 Lago de Matrullas at Damsite near Orocovis (e) .................................................................. 50032590 115 Río Bauta near Orocovis (d) ................................................................................................. 50034000 116 Río Grande de Manatí at Ciales (d) .............................................................................................. 50035000 118 Río Grande de Manatí at Highway 149 at Ciales (c,b) ................................................................. 50035500 120 Río Cialitos at Highway 649 at Ciales (c,b) ......................................................................... 50035950 121 Río Grande de Manatí at Highway 2 near Manatí (d,c,b,p).......................................................... 50038100 123 LAGUNA TORTUGUERO BASIN Laguna Tortuguero Outlet near Vega Baja (c,b) .......................................................................... 50038200 127 RIO CIBUCO BASIN Río Cibuco below Corozal (d,c,b) ................................................................................................ 50038320 130 Río Cibuco at Vega Baja (d,c,b) ................................................................................................... 50039500 134 RIO DE LA PLATA BASIN Lago Carite at Gate Tower near Cayey (e) ................................................................................... 50039990 140 Río de la Plata at Proyecto La Plata (c,b) ..................................................................................... 50043000 141 Río de la Plata at Comerio (d,s) .................................................................................................... 50043800 143 Río de la Plata near Comerio (c,b)................................................................................................ 50044000 149 Río Guadiana near Naranjito (c,b) ........................................................................................ 50044850 151 Lago La Plata at Damsite near Toa Alta (e) ................................................................................. 50045000 153 Río de la Plata below La Plata Dam (d,s) ..................................................................................... 50045010 154 Río de la Plata at Highway 2 near Toa Alta (d,c,b,s,p)................................................................. 50046000 159 RIO HONDO BASIN Río Hondo at Flood Channel near Cataño (c,b)............................................................................ 50047530 164 VIII SURFACE-WATER AND WATER-QUALITY STATIONS, IN DOWNSTREAM ORDER, FOR WHICH RECORDS ARE PUBLISHED IN THIS VOLUME--Continued Station number Page RIO DE BAYAMON BASIN Río de Bayamón at Arenas (d)...................................................................................................... 50047535 166 Río Sabana at Vista Monte (d).............................................................................................. 50047540 168 Lago de Cidra at Damsite near Cidra (e) ...................................................................................... 50047550 170 Río de Bayamón below Cidra Dam (d,s) ...................................................................................... 50047560 171 Río de Bayamón near Aguas Buenas (c,b) ................................................................................... 50047600 177 Río de Bayamón near Bayamón (d).............................................................................................. 50047850 179 Río Guaynabo near Bayamón (c,b)....................................................................................... 50047990 181 Río de Bayamón at Flood Channel at Bayamón (c,b,p) ............................................................... 50048510 183 RIO PUERTO NUEVO BASIN Río Piedras: Lago Las Curías at Damsite near Río Piedras (e) ......................................................................... 50048680 185 Río Piedras at El Señorial(d,s) ...................................................................................................... 50048770 186 Río Piedras near Río Piedras (c,b,p) ............................................................................................. 50048800 197 Río Piedras at Hato Rey (d,c,b) .................................................................................................... 50049100 199 Laguna San José: Laguna San José No. 2 at San Juan (c,b) ...................................................................................... 50049820 203 Bahía de San Juan: Bahía de San Juan No. 5 at San Juan (c,b).................................................................................... 50049920 204 QUEBRADA BLASINA BASIN Quebrada Blasina near Carolina (c,b) ........................................................................................... 50050300 206 RIO GRANDE DE LOIZA BASIN Río Grande de Loíza at Quebrada Arenas (d)............................................................................... 50050900 208 Quebrada Blanca at El Jagual (d,s) ....................................................................................... 50051150 210 Quebrada Salvatierra near San Lorenzo (d,s) ....................................................................... 50051180 216 Río Cayaguás at Cerro Gordo (d) ......................................................................................... 50051310 222 Río Grande de Loíza at Highway 183 near San Lorenzo (d,s) ..................................................... 50051800 224 Río Turabo above Borinquen (d,s)........................................................................................ 50053025 230 Río Grande de Loíza at Caguas (d,c,b,s) ...................................................................................... 50055000 236 Río Caguitas near Aguas Buenas (d,s).................................................................................. 50055100 243 Río Caguitas at Villa Blanca at Caguas (d,s)........................................................................ 50055225 249 Río Caguitas at Highway 30 at Caguas (c,b) ........................................................................ 50055250 255 Río Bairoa at Bairoa (d,s) ..................................................................................................... 50055390 257 Río Bairoa near Caguas (c,b) ................................................................................................ 50055400 263 Río Gurabo: Río Gurabo below El Mangó (d,s)........................................................................................ 50055750 265 Río Valenciano near Juncos (d,s)..................................................................................... 50056400 271 Río Gurabo at Gurabo (d,s)................................................................................................... 50057000 277 Río Gurabo near Gurabo (c,b) .............................................................................................. 50057025 283 Río Cañas at Río Cañas (d,s) ................................................................................................ 50058350 285 Lago Loíza at Damsite near Trujillo Alto (c,b,e).......................................................................... 50059000 291 Río Grande de Loíza below Damsite (d,s).................................................................................... 50059050 293 Río Grande de Loíza below Trujillo Alto (c,b)............................................................................. 50059100 299 Río Canóvanas near Campo Rico (d).................................................................................... 50061800 301 RIO ESPIRITU SANTO BASIN Quebrada Sonadora near El Verde........................................................................................ 50063440 304 Río Espíritu Santo near Río Grande (d,c,b) .................................................................................. 50063800 306 Río Grande near El Verde (d) ............................................................................................... 50064200 310 RIO MAMEYES BASIN Río Mameyes near Sabana (d,s).................................................................................................... 50065500 312 Río Mameyes at Mameyes (d) ...................................................................................................... 50066000 317 IX SURFACE-WATER AND WATER-QUALITY STATIONS, IN DOWNSTREAM ORDER, FOR WHICH RECORDS ARE PUBLISHED IN THIS VOLUME--Continued Station number Page RIO SABANA BASIN Río Sabana at Sabana (d) .............................................................................................................. 50067000 321 RIO FAJARDO BASIN Río Fajardo above Fajardo (d,s).................................................................................................... 50070500 323 Río Fajardo near Fajardo (d,c,b,p,s) ............................................................................................. 50071000 329 Río Fajardo below Fajardo (c,b) ................................................................................................... 50072500 335 RIO BLANCO BASIN Quebrada Guabá near Naguabo (d)............................................................................................... 50074950 337 Río Icacos near Naguabo (d)......................................................................................................... 50075000 339 RIO HUMACAO BASIN Río Humacao at Las Piedras (d) ................................................................................................... 50081000 342 Río Humacao at Highway 3 at Humacao (c,b) ............................................................................. 50082000 344 RIO GUAYANES BASIN Río Guayanés at Yabucoa (c,b,p) ................................................................................................. 50083500 346 Río Guayanés above mouth at Playa de Guayanés (c,b) .............................................................. 50086500 348 RIO MAUNABO BASIN Río Maunabo at Lizas (d) ............................................................................................................. 50090500 350 Río Maunabo at Maunabo (c,b) .................................................................................................... 50091000 352 RIO CHICO BASIN Río Chico at Providencia (c,b)...................................................................................................... 50091800 354 RIO GRANDE DE PATILLAS BASIN Río Grande de Patillas near Patillas (d,c,b) .................................................................................. 50092000 356 Lago Patillas at Damsite near Patillas (e) ..................................................................................... 50093045 359 RIO SALINAS BASIN Río Lapas near Rabo del Buey (d)................................................................................................ 50100200 362 Río Majada at La Plena (d) ........................................................................................................... 50100450 364 RIO COAMO BASIN Río Coamo at Coamo (d) .............................................................................................................. 50106100 366 Río Coamo near Coamo (c,b) ....................................................................................................... 50106500 368 RIO DESCALABRADO BASIN Río Descalabrado near Los Llanos (d).......................................................................................... 50108000 370 RIO JACAGUAS BASIN Río Toa Vaca above Lago Toa Vaca (d,s)............................................................................ 50110900 372 Lago Toa Vaca at Damsite near Villaba (e).................................................................................. 50111210 378 Lago Guayabal at Damsite near Juana Díaz (e)............................................................................ 50111300 380 Río Jacaguas at Juana Díaz (d) ..................................................................................................... 50111500 381 IO INABON BASIN Río Inabón at Real Abajo (d) ........................................................................................................ 50112500 384 RIO BUCANA BASIN Río Bucaná: Río Cerrillos above Lago Cerrillos near Ponce (d)....................................................................... 50113800 386 Lago Cerrillos at Damsite near Ponce (e) ..................................................................................... 50113950 388 Río Cerrillos near Ponce (d,c,b).................................................................................................... 50114000 389 Río Bucaná at Highway 14 Bridge near Ponce (d) ....................................................................... 50114390 393 X SURFACE-WATER AND WATER-QUALITY STATIONS, IN DOWNSTREAM ORDER, FOR WHICH RECORDS ARE PUBLISHED IN THIS VOLUME--Continued Station number Page RIO PORTUGUES BASIN Río Portugués at Tibes (d,s).......................................................................................................... 50114900 395 Río Portugués near Ponce (c,b)................................................................................................... ..50115000 401 Río Potugués at Highway 14 near Ponce (d) ................................................................................ 50115900 403 Río Portugués at Ponce (c,b,p)...................................................................................................... 50116200 407 RIO GUAYANILLA BASIN Río Guayanilla near Guayanilla (d) .............................................................................................. 50124200 409 Río Guayanilla at Central Rufina (c,b,p) ...................................................................................... 50124700 411 RIO YAUCO BASIN Lago Lucchetti at Damsite near Yauco (e) ................................................................................... 50125780 413 RIO LOCO BASIN Lago Loco at Damsite near Yauco (e) .......................................................................................... 50128900 414 Río Loco at Guánica (c,b,p) .......................................................................................................... 50129700 415 RIO GUANAJIBO BASIN Río Guanajibo at Highway 119 at San Germán (d) ...................................................................... 50131990 418 Río Guanajibo near San Germán (c,b) .......................................................................................... 50133600 420 Río Rosario near Hormigueros (d,c,b,s) ............................................................................... 50136400 422 Río Guanajibo near Hormigueros (d,c,b,p)................................................................................... 50138000 429 RIO YAGUEZ BASIN Río Yagüez near Mayagüez (c,b).................................................................................................. 50138800 434 RIO GRANDE DE AÑASCO BASIN Lago Guayo at Damsite near Castañer (e) ............................................................................ 50141500 436 Río Grande de Añasco near Lares (c,b) ........................................................................................ 50143000 437 Río Grande de Añasco near San Sebastián (d,c,b)........................................................................ 50144000 439 Río Grande de Añasco near Añasco (c,b,p) .................................................................................. 50146000 443 RIO CULEBRINAS BASIN Río Culebrinas near San Sebastián (c,b)....................................................................................... 50147600 446 Río Culebrinas at Highway 404 near Moca (d) ............................................................................ 50147800 448 Río Culebrinas near Aguada (c,b,p).............................................................................................. 50149100 450 Discharge at partial-record stations and miscellaneous sites low-flow partial-record stations.................................................................................................................... 456 Analyses of samples collected of water-quality partial-record stations and miscellaneous sites.................................................................................................................... 472 ST. THOMAS, U.S. VIRGIN ISLANDS Bonne Resolution Gut at Bonne Resolution (d) ........................................................................... 50252000 606 Turpentine Run at Mount Zion (d)................................................................................................ 50274000 608 ST. JOHN, U.S. VIRGIN ISLANDS Guinea Gut at Bethany (d) ............................................................................................................ 50295000 610 ST. CROIX, U.S. VIRGIN ISLANDS Jolly Hill Gut at Jolly Hill (d) ....................................................................................................... 50345000 612 XI GROUND-WATER WELLS, BY BASIN, FOR WHICH RECORDS ARE PUBLISHED Page RIO GUAJATACA BASIN Well 182925067031100 Local number OT-1.....................................................................................................................................484 Well 182422067015100 Local number 165 .......................................................................................................................................486 Well 182647066552400 Local number 202 .......................................................................................................................................487 RIO CAMUY BASIN Well 182723066511200 Local number Z-4........................................................................................................................................488 Well 182431066463400 Local number CA-4.....................................................................................................................................490 RIO GRANDE DE ARECIBO BASIN Well 182756066454700 Local number BARR-1 ...............................................................................................................................492 Well 182737066370900 Local number 204 .......................................................................................................................................493 Well 182616066364100 Local number EN-1.....................................................................................................................................494 Well 182626066345100 Local number TI-1 ......................................................................................................................................495 Well 182603066333601 Local number FA-2 .....................................................................................................................................496 Well 182209066340600 Local number FL-1 .....................................................................................................................................498 RIO GRANDE DE MANATI BASIN Well 182757066325600 Local number 206 .......................................................................................................................................499 Well 182710066303700 Local number 207 .......................................................................................................................................500 Well 182549066304300 Local number 166 .......................................................................................................................................501 Well 182506066280200 Local number HI-2......................................................................................................................................502 Well 182308066260400 Local number 210 .......................................................................................................................................503 Well 182548066265700 Local number CS-7 .....................................................................................................................................504 RIO CIBUCO BASIN Well 182614066261500 Local number PA-2 .....................................................................................................................................505 Well 182712066251700 Local number TO-3.....................................................................................................................................506 Well 182615066235300 Local number 211 .......................................................................................................................................507 Well 182647066201700 Local number 70 .........................................................................................................................................508 Well 182515066194000 Local number 212 .......................................................................................................................................509 Well 182330066185700 Local number 213 .......................................................................................................................................510 RIO DE LA PLATA BASIN Well 182804066173500 Local number DA-1 ....................................................................................................................................511 Well 182526066165001 Local number SR-2 .....................................................................................................................................512 Well 182548066164401 Local number MA-2....................................................................................................................................513 Well 182620066163400 Local number HG-1 ....................................................................................................................................514 Well 182620066163403 Local number HG-4 ....................................................................................................................................517 Well 182657066162700 Local number SA-1 .....................................................................................................................................518 Well 182657066162701 Local number SA-3 .....................................................................................................................................519 Well 182654066150600 Local number TB-1 .....................................................................................................................................520 Well 182530066135400 Local number 216 .......................................................................................................................................521 Well 182655066142400 Local number 217 .......................................................................................................................................522 XII GROUND-WATER WELLS, BY BASIN, FOR WHICH RECORDS ARE PUBLISHED RIO HONDO TO RIO PUERTO NUEVO BASINS Well 182441066082600 Local number 219 .......................................................................................................................................523 Well 182531066075900 Local number 652 .......................................................................................................................................524 Well 182511066045401 Local number PN-2 .....................................................................................................................................526 Well 182435066052700 Local number PN-5 .....................................................................................................................................527 Well 182445066043401 Local number PN-6 .....................................................................................................................................528 Well 182443066041502 Local number PN-8c ...................................................................................................................................529 Well 182417066042700 Local number PN-10 ...................................................................................................................................530 Well 182349066032600 Local number PN-13 ...................................................................................................................................531 Well 182406066034700 Local number PN-19 ...................................................................................................................................532 RIO GRANDE DE LOIZA BASIN Well 181352066025300 Local number CJ-TW19A...........................................................................................................................533 Well 181311066022500 Local number CJ-TW11..............................................................................................................................534 Well 181446066013400 Local number CJ-TW20..............................................................................................................................536 Well 181539066014500 Local number CJ-TW15..............................................................................................................................538 Well 181550065593200 Local number 50 .........................................................................................................................................540 Well 182515065594100 Local number 222 .......................................................................................................................................541 Well 181540065580300 Local number CJ-TW18..............................................................................................................................542 Well 181513065554600 Local number CJ-TW3B .............................................................................................................................544 RIO HERRERA TO RIO ANTON RUIZ BASINS Well 182344065490801 Local number RE-2A ..................................................................................................................................545 Well 182223065455900 Local number RM-02..................................................................................................................................547 Well 181230065444900 Local number ARR-1..................................................................................................................................548 Well 182138065431800 Local number RS-02 ...................................................................................................................................549 Well 182131065421100 Local number RP-04 ...................................................................................................................................550 Well 181823065401900 Local number RF-04 ...................................................................................................................................551 Well 181917065382701 Local number RF-12 ...................................................................................................................................552 RIO HUMACAO TO QUEBRADA AGUAS VERDES BASINS Well 180358065503600 Local number YDO-1 .................................................................................................................................553 Well 180415065513900 Local number 96 .........................................................................................................................................554 Well 175855066023100 Local number FID-2....................................................................................................................................555 Well 175855066050500 Local number ALG-1..................................................................................................................................557 Well 175728066072200 Local number BAR-1..................................................................................................................................559 Well 175719066085500 Local number P-13......................................................................................................................................561 Well 175858066100200 Local number 6 ...........................................................................................................................................562 Well 180002066132200 Local number HW-TW-01..........................................................................................................................563 Well 180001066122002 Local number HW-TW-03C .......................................................................................................................564 Well 175947066130601 Local number HW-TW-5B .........................................................................................................................565 Well 175957066123400 Local number HW-TW-13..........................................................................................................................566 XIII GROUND-WATER WELLS, BY BASIN, FOR WHICH RECORDS ARE PUBLISHED RIO SALINAS TO RIO JACAGUAS BASINS Well 175809066133100 Local number CQ-1.....................................................................................................................................567 Well 180206066135500 Local number RM-5 ....................................................................................................................................568 Well 180104066152300 Local number RM-10..................................................................................................................................569 Well 175910066155500 Local number SA-D ...................................................................................................................................570 Well 175708066163000 Local number EC-1 .....................................................................................................................................572 Well 175903066165000 Local number PG-07 ...................................................................................................................................574 Well 175943066224800 Local number PS-07....................................................................................................................................575 Well 175829066232200 Local number 87 .........................................................................................................................................576 Well 180020066261500 Local number CA-1.....................................................................................................................................577 Well 180048066301800 Local number FA-1 .....................................................................................................................................579 RIO INABON TO RIO LOCO BASINS Well 175950066354200 Local number 141 .......................................................................................................................................581 Well 175934066364800 Local number CO-3.....................................................................................................................................582 Well 180045066381600 Local number AN-1 ....................................................................................................................................585 Well 180156066434000 Local number LV-1.....................................................................................................................................586 Well 180133066503300 Local number 132 .......................................................................................................................................588 RIO GUANAJIBO BASIN Well 180132067033800 Local number 143 .......................................................................................................................................589 Well 180542067084000 Local number CR-1.....................................................................................................................................590 Well 180628067084300 Local number CR-TW9A............................................................................................................................593 Well 180628067084301 Local number CR-TW9B ............................................................................................................................594 RIO YAGUEZ TO RIO GRANDE DE AÑASCO BASINS Well 181232067083700 Local number CI-1 ......................................................................................................................................597 RIO CULEBRINAS BASIN Well 181911067140500 Local number C-4........................................................................................................................................599 Well 182017067143300 Local number R-4 .......................................................................................................................................601 Well 182442067091700 Local number 200 .......................................................................................................................................604 ST. CROIX, U.S. VIRGIN ISLANDS Well 174225064472000 Local number 2 ...........................................................................................................................................616 Well 174243064475100 Local number 3 ...........................................................................................................................................617 Well 174316064480800 Local number 13 .........................................................................................................................................618 ST. THOMAS, U.S. VIRGIN ISLANDS Well 182038064550300 Local number 6 ...........................................................................................................................................619 Well 182038064580000 Local number 8 ...........................................................................................................................................620 ST. JOHN, U.S. VIRGIN ISLANDS Well 181956064464500 Local number 11 .........................................................................................................................................621 -- -- -- -- XIV WATER RESOURCES DATA FOR PUERTO RICO AND THE U.S. VIRGIN ISLANDS, 1998 DISCONTINUED STREAMFLOW STATIONS The following continuous-record streamflow stations in Puerto Rico and the U.S. Virgin Islands have been discontinued or converted to partial-record stations. Daily streamflow or stage records were collected for the period of record shown for each station. Station number Station name Drainage area (mi2) Period of record 50007000 Quebrada de los Cedros near Isabela 6.91 1970 50010600 Río Guajataca above Lago de Guajataca 1984-89 50011000 Canal Diversion Lago Guajataca 1970 50011200 Río Guajataca below Lago Guajataca 1969-70,1984-87 50011400 Río Guajataca above mouth near Quebradillas 1969-70,1984-89 50013000 Río Camuy near Lares 7.62 1969-71 50014000 Río Criminales near Lares 4.68 1969-70 50014600 Río Camuy at Tres Pueblos Sinkhole -- 1990-96 50015700 Río Camuy near Hatillo -- 1984-96 50016000 Río Camuy near Camuy -- 1969-73 50021000 Río Pellejas at Central Pellejas 5.46 1968-70 50021050 Río Pellejas below Central Pellejas 7.89 1972-75 50021500 Río Pellejas near Utuado 9.55 1969-71 50023000 Río Viví near Central Pellejas 5.66 1969-75 50027200 Río Grande de Arecibo blw. Lago dos Bocas 169 1970-71 50029000 Río Grande de Arecibo at Central Cambalache 200 1969-83 50031500 Río Sana Muerto near Orocovis 3.68 1965-70 50035200 Río Grande de Manatí at Hwy 145 at Ciales 132 1972 50035950 Río Cialitos at Hwy 649 at Ciales 17 1970-82 50038360 Río Mavilla near Corozal 9.51 1969-70 50038600 Río Unibón near Morovis 5.29 1969-70 50038700 Río Morovis at Morovis 1.26 1968 50038900 Río Indio at Vega Baja -- 1963,66,71 50039600 Río Cibuco at Central San Vicente -- 1969-72 50043200 Río Usabon near Barranquitas 9.15 1968-69,71 50043400 Río Aibonito Tributary near Aibonito 1.13 1968-71 50044600 Río Guadiana near Naranjito 1.73 1971 50044650 Quebrada del Toro near Naranjito 0.54 1971 50044800 Quebrada Anones near Naranjito 2.32 1971 50045700 Río Lajas at Toa Alta 8.65 1966-75 50047820 Río de Bayamón at Hwy 174 near Bayamón 31.90 1966 50048000 Río de Bayamón at Bayamón 71.90 1963-67 50049000 Río Piedras at Río Piedras 12.5 1971-82, 1987-93 50049310 Quebrada Josefina at Piñero Avenue 3.84 1988-91 50053050 Río Turabo at Borinquen 7.89 1984-90 50054000 Quebrada de las Quebradillas near Caguas 6.25 1969-71,73 50055170 Río Cagüitas near Caguas 8.27 1992-97 50055650 Quebrada Caimito near Juncos 0.82 1984-87 50056000 Río Valenciano near Las Piedras 6.85 1971 50056900 Quebrada Mamey near Gurabo 2.30 1984-92 XV WATER RESOURCES DATA FOR PUERTO RICO AND THE U.S. VIRGIN ISLANDS, 1998 DISCONTINUED STREAMFLOW STATIONS--Continued Station Station name Drainage Period of number area (mi2) record 50058300 Quebrada Arena near Caguas -- 1971 50059000 Río Piedras at Río Piedras 12.5 1971-82, 1987-93 50061300 Río Canovanillas near Loíza 14.40 1968-73 50062500 Río Herrera near Colonia Dolores 2.75 1968-72 50063300 Río Espíritu Santo near El Verde 2.23 1968-73 50063500 Quebrada Toronja at El Verde 0.064 1983-96 50065700 Río Mameyes at Hwy 191 at Mameyes 11.80 1967-85 50072000 Río Fajardo at Fajardo 21.60 1960-63 50073200 Río Daguao at Daguao 2.26 1966-82 50073400 Quebrada Palma at Daguao 4.84 1972-77 50074000 Río Santiago at Naguabo 4.99 1966-82 50075500 Río Blanco at Florida 11.00 1966-82 50076000 Río Blanco near Florida 12.30 1983-85 50077000 Río Blanco at Río Blanco 17.60 1973-77 50077400 Río Blanco at Colonia La Fe 18.80 1967-70 50078500 Río Anton Ruíz at Central Pasto Viejo 4.33 1968 50081500 Río Humacao near Humacao 9.23 1973 50082000 Río Humacao at Hwy 3 at Humacao 17.30 1983-85 50082200 Río Humacao near La Suiza 19.90 1965-66, 1969-71 50082800 Río Guayanés near Colonia Laura 4.69 1969-82 50083500 Río Guayanés near Yabucoa 17.20 1969-71 50084000 Río Limones near Yabucoa 7.89 1969-71 50085100 Río Guayanés at Central Roig 26.60 1965-66, 1968,70 50086100 Río del Ingenio at Comunas 5.50 1965-66, 1968-69 50086500 Río Guayanés at Playa Guayanés 34.00 1965-66, 1968-71 50087200 Caño Santiago near Central Roig 6.04 1965-71 50091000 Río Maunabo at Maunabo 12.40 1965,67, 1969-82 50091200 Río Maunabo near Maunabo 12.70 1971-72 50091400 Río Jacaboa near Lamboglia 4.13 1965-73 50091700 Río Chico at Patillas 6.82 1965, 1969-72 50091800 Río Chico at Providencia 50094200 Río Grande de Patillas at Patillas 50094300 Río Grande de Patillas at Providencia 50094400 Río Nigua at Pitahaya 50095200 Río Guamaní at Guayama 4.90 1965, 1967-69, 1971 27.90 1967, 1969, 1971 29.00 1971 5.86 1965, 1969, 1970-71, 1973 8.22 1969-71 50095500 Río Guamaní near Guayama 50099000 Quebrada Aguas Verdes near Salinas 50106500 Río Coamo near Coamo 50106900 Río Coamo below Lago Coamo near Coamo 50107200 Río Coamo at mouth near Santa Isabel 12.30 1969-70 0.39 1989 46.00 1967-68, 1984-85, 1986 65.40 1967-68 69.30 1967-68 50108200 Río Descalabrado at Las Ollas 13.90 1965, 1967-71 50108500 Río Descalabrado near Santa Isabel 18.10 1966-67 50111200 Río Toa Vaca near Villalba 21.40 1966-70 50111700 Río Jacaguas near Juana Díaz 53.20 1966-68 50111750 Río Jacaguas below Quebrada Guanábana 56.30 1989 XVI WATER RESOURCES DATA FOR PUERTO RICO AND THE U.S. VIRGIN ISLANDS, 1998 DISCONTINUED STREAMFLOW STATIONS--Continued Station Station name Drainage Period of number area (mi2) record 50112100 Río Jacaguas near Arús 59.60 1966-67 50112600 Río Inabón at Coto Laurel -- 1967-71 50113100 Río Guayo near Coto Laurel 11.80 1965, 1968-71 50113500 Río Inabón near Arús 30.20 1964-65 50114400 Río Bucaná near Ponce 25.60 1965-81 50114700 Río Bucaná near Playa de Ponce 28.40 1964-67 50115000 Río Portugués near Ponce 8.82 1964-97 50116500 Río Portugués at Highway 2 Bypass at Ponce 20.50 1964-65 50119000 Río Matilde at Ponce 19.40 1965-66 50121000 Río Tallaboa at Peñuelas 24.20 1959-82 50122000 Río Tallaboa at Tallaboa 31.50 1959-63 50124000 Río Guayanilla nr Guayanilla 18.50 1961-69 50124500 Río Guayanilla at Guayanilla 20.80 1971-82 50125900 Río Duey above Diversion near Yauco 8.93 1977-80 50126150 Río Yauco above Diversion Monserrate near Yauco 27.20 1978-85 50128000 Río Yauco near Yauco 45.50 1962-64, 1977-85 50129000 Río Loco near Yauco 8.50 1963-67 50129500 Río Loco near Guánica 21.00 1963-69 50129900 Laguna Cartagena near Boquerón -- 1984-86 50130320 Quebrada Mamey at Joyuda 0.38 1986-88 50136000 Río Rosario at Rosario 16.40 1975-86 50141000 Río Yahuecas near Adjuntas 15.40 1980-85 50145000 Río Grande de Añasco at El Espino 108.00 1959-66, 1961-63 50147000 Río Culebrinas at San Sebastian 16.70 1960-82 50214500 Quebrada Resaca near Monte Resaca, Culebra 0.23 1991-93 50215000 Drainage Canal at Culebra Airport, Culebra 0.08 1991-93 50231000 Quebrada Confresí Tributary near Isabel II, Vieques 0.28 1991-93 50232000 Quebrada La Mina near Esperanza, Vieques 0.68 1991-96 50233000 Quebrada Pilón at Colonia Puerto Real, Vieques 0.67 1991-96 50276000 Turpentine Run at Mariendal 2.97 1963-69, 1978-86 50292600 Lameshur Bay Gut at Lameshur, St. John 0.38 1992-94 50294000 Fish Bay Gut at Fish Bay, St. John 1.48 1992-94 50295500 Cruz Bay Gut at Cruz Bay, St. John, V 0.09 1992-93 50332000 River Gut at River 1.42 1991-93 50333500 River Gut near Golden Grove 5.40 1990-93 50333700 River Gut at Hwy 66 at Fairplanes 5.89 1990-96 50334500 Bethehem Gut at Hwy 66 at Fairplanes 4.11 1990-96 50337500 Gut 4.5 at Cane Valley 0.2 1991-93 50348000 Salt River at Canaan 0.36 1991-93 50349000 Gut 10 near Altona 0.13 1991-93 1 WATER RESOURCES DATA FOR PUERTO RICO AND THE U.S. VIRGIN ISLANDS, 1998 INTRODUCTION The Water Resources Division of the U.S. Geological Survey, in cooperation with local and federal agencies obtains a large amount of data pertaining to the water resources of the Commonwealth of Puerto Rico and the Territory of the U.S. Virgin Islands each water year. These data, accumulated during many water years, constitute a valuable data base for developing an improved understanding of the water resources of the area. To make these data readily available to interested parties outside the U.S. Geological Survey, the data are published annually in this report series entitled "Water Resources Data for Puerto Rico and the U.S. Virgin Islands, 1998." This report includes records on both surface and ground water. Specifically, it contains: (1) discharge records for 76 streamflow gaging stations, daily sediment records for 27 streamflow stations, 99 partial-record or miscellaneous streamflow stations, stage records for 17 reservoirs, and (2) water-quality records for 16 streamflow-gaging stations, and for 42 ungaged stream sites, 11 lake sites, 2 lagoons, and 1 bay, and (3) water-level records for 97 observation wells. Water-resources data for Puerto Rico for calendar years 1958-67 were released in a series of reports entitled "Water Records of Puerto Rico." Water-resources data for the U.S. Virgin Islands for the calendar years 1962-69 were released in a report entitled "Water Records of U.S. Virgin Islands." Included were records of streamflow, ground-water levels, and water-quality data for both surface and ground water. Beginning with the 1968 calendar year, surface-water records for Puerto Rico were released separately on an annual basis. Ground-water level records and water-quality data for surface and ground water were released in companion reports covering periods of several years. Data for the 1973-74 reports were published under separate covers. Water-resources data reports for 1975­ 76, 1977, 1978, 1979-80, 1981-82, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, and 1997 water years consist of one volume each and contain data for streamflow, water quality, and ground water. Publications similar to this report are published annually by the U.S. Geological Survey for all States. These official Survey reports have an identification number consisting of the two-letter State abbreviation, the last two digits of the water year, and the volume number. For example, this volume is identified as "U.S. Geological Survey Water-Data Report PR-98-1." These water-data reports are for sale in paper copy or in microfiche by the National Technical Information Service, U.S. Department of Commerce, Springfield, Virginia, 22161. Additional information, including current prices, for ordering specific reports may be obtained from the District Chief at the address given on back of the title page or by telephone (787) 749-4346. 2 WATER RESOURCES DATA FOR PUERTO RICO AND THE U.S. VIRGIN ISLANDS, 1998 COOPERATION The U.S. Geological Survey has had cooperative agreements with organizations of the Commonwealth of Puerto Rico and the Territory of the U.S. Virgin Islands for the systematic collections of water resources data since 1958. Organizations that supplied data are acknowledged in the station descriptions. Organizations that assisted in collecting data through cooperative agreements with the U.S. Geological Survey are: Puerto Rico Environmental Quality Board Puerto Rico Aqueduct and Sewer Authority Puerto Rico Department of Agriculture Puerto Rico Industrial Development Company Puerto Rico Department of Housing Puerto Rico Highway Authority Puerto Rico Department of Natural and Environmental Resources Puerto Rico Department of Health Puerto Rico Electric Power Authority Puerto Rico Solid Waste Management Authority Puerto Rico Legislature Puerto Rico Civil Defense U.S. Virgin Islands Department of Planning and Natural Resources Funds were also provided by the U.S. Army, Corps of Engineers, for the collection of records at six gaging stations published in this report. _________________________________________________ _________________________________________________ _________________________________________________ 3 WATER RESOURCES DATA FOR PUERTO RICO AND THE U.S. VIRGIN ISLANDS, 1998 SUMMARY OF HYDROLOGIC CONDITIONS Rainfall Rainfall throughout Puerto Rico during water year 1998 (October 1997 to September 1998) averaged about 117 percent above normal. Rainfall was above normal during the months of October, January, February, March, July, August, and September (table 1). Significant above-normal rainfall conditions were recorded during September as rainfall averaged 225 percent above normal, mostly due to the passage of Hurricane Georges over Puerto Rico during September 21-22, 1998. As much as 25 inches of rain fell on some of the island’s interior municipios during a 24-hour period. Severe floods and landslides resulted from the intensive rainfall and serious damages to homes, businesses, and infrastructure were reported. During the months of November, December, April, May, and June, rainfall was deficient with averages that ranged from 28 to 97 percent of normal. Rainfall, during the 1998 water year, averaged 102 percent of normal in northern Puerto Rico, 126 percent of normal in southern Puerto Rico, 123 percent of normal in western Puerto Rico, and 121 percent of normal in eastern Puerto Rico. Monthly average rainfall islandwide for the 1998 water year and for the 30-year period (1961-1990) used to define normal rainfall, as reported by the National Oceanic and Atmospheric Administration are listed in table 1. Table 1. Islandwide monthly rainfall for the water year 1998 and annual averages for the 30-year reference period, 1961-1990 1998 Water Year 30-year normal Month (inches) (inches) October 9.52 8.29 November 4.68 6.55 December 1.23 4.38 January 4.16 2.86 February 4.08 2.52 March 3.59 3.02 April 4.32 4.46 May 6.46 6.96 June 4.66 4.99 July 5.39 5.08 August 9.52 6.89 September 16.04 7.14 TOTAL 73.65 63.14 Surface Water Streamflow in Puerto Rico during most of the 1998 water year was, in general, above normal in southern and eastern Puerto Rico, but below normal in the northern and western regions, based on the four index stations. A comparison of the monthly- mean flows during the 1998 water year with the long-term minimum, median and maximum of the monthly mean flows, for the period of record at the index stations on the Río Grande de Manatí (north), the Río Fajardo (east), the Río Inabón (south), and the Río Grande de Añasco (west) is shown in figure 1. During December, below normal flows were recorded at the four index stations. At the Río Grande de Manatí and Río Grande de Añasco index stations these below normal flows established new historical minimum monthly-mean flows. Excessive flows occurred at the four index stations during September due to intensive rainfall produced by the passage of Hurricane Georges over Puerto Rico. Historical maximum monthly-mean flows for September, were recorded at the Río Grande de Manatí and Río Grande de Añasco. In the northern area, the Río Grande de Manatí index station recorded flows below the long-term monthly median during October to January, March, April, and July. Monthly mean flows during these months ranged from 22 to 82 percent of the long- term median of the monthly mean flows. Monthly mean flow during February, May, June, August, and September was above normal, and ranged from 121 to 1,100 percent of normal. Historical minimum and maximum monthly mean flows were recorded at this index station during December and September, respectively. In the eastern area, the index station on the Río Fajardo, recorded monthly mean flows above the long-term median during eleven of the twelve months of the 1998 water year. At this station, only the December mean flow was slightly below the long-term monthly median. The flow in December was 96 percent of normal. The rest of the year, monthly mean flows ranged from 124 to 220 percent of the long-term median. 4 NORTH EAST RÍO GRANDE DE MANATÍ AT HWY 2 RÍO FAJARDO NEAR FAJARDO (50038100) (50071000) 10,000 1998 MONTHLY MEAN 1964-97 MEDIAN OF MONTHLY-MEAN 1,000 1,000 100 100 1998 MONTHLY MEAN 1964-97 MEDIAN OF MONTHLY-MEAN MONTHLY-MEAN DISCHARGE, IN CUBIC FEET PER SECOND 10 10 1 O N D J F M A M J J A S 1997 1998 SOUTH RÍO INABÓN AT REAL ABAJO (50112500) 1 O N D J F M A M J J A S 1997 1998 WEST RÍO GRANDE DE AÑASCO NEAR SAN SEBASTIÁN (50144000) 1,000 1998 MONTHLY MEAN 1964-97 MEDIAN OF MONTHLY-MEAN 100 10 10 1 1 O N D J F M A M J J A S O N D J F M A M J J A S 1997 1998 1997 1998 Unshaded area indicates range between highest and lowest monthly-mean discharges for the period of record to water year 1998. 10,000 1,000 1998 MONTHLY MEAN 1964-97 MEDIAN OF MONTHLY-MEAN 100 MONTHLY-MEAN DISCHARGE, IN CUBIC FEET PER SECOND Figure 1. Monthly-mean discharge of selected streams in Puerto Rico. 5 WATER RESOURCES DATA FOR PUERTO RICO AND THE U.S. VIRGIN ISLANDS, 1998 In the southern area, the Río Inabón index station recorded monthly mean flows below the long-term median during October to January. During these months, the monthly mean flows ranged from 42 to 88 percent of normal. During April, a new historical minimum monthly mean flow was recorded. The rest of the year, the monthly mean flows were above the long-term monthly median, and ranged from 145 to 510 percent of normal. In the western area, the index station on the Río Grande de Añasco, recorded monthly mean flows below the long-term median during the first seven months of the 1998 water year. A below normal monthly mean flow was also recorded during June. During these months, the monthly mean flows ranged from 41 to 89 percent of the long-term median. Historical minimum monthly mean flows were recorded during November and December at this index station. Mean monthly flows were above normal during May and from July to September. Monthly mean flows during these months ranged from 226 to 560 percent of the long-term median. A historical maximum monthly mean flow was recorded during September. The most important hydrologic event that happened during the 1998 water year was the flooding caused by the intense rainfall generated by the passage of Hurricane Georges over Puerto Rico. The eye of Hurricane Georges made landfall near the municipios of Humacao and Yabucoa on the east coast of Puerto Rico and moved over the mountainous central region of the Island during September 21-22. Hurricane Georges produced heavy rains over Puerto Rico, especially in the mountainous interior. This heavy rain produced moderate to severe floods through the island. Almost all of the island’s 78 municipios were affected by the floods. The most severe flooding occurred within the basins of the north and west areas: the Río Grande de Arecibo, the Río Grande de Manatí, the Río de la Plata, the Río Grande de Añasco, and the Río Culebrinas. Floodwaters inundated urban areas and communities, washing away and damaging homes, businesses, vehicles, bridges, and roads. Fortunately, there were no deaths directly associated with the passage of the hurricane over Puerto Rico. Damage to the island infrastructure was enormous. The U.S. Geological Survey data network was highly affected with many stations destroyed or severely damaged. Historical maximum peak stages and discharges were recorded during this event in several streamflow gaging stations. Peak stages and discharges at selected streamflow gaging stations in Puerto Rico are listed in table 2. Table 2. Summary of peak stages and discharges prior to and during September 21-22, 1998, at selected U.S. Geological Survey streamflow gaging stations in Puerto Rico [mi2, square miles; ft3/s, cubic feet per second; mm/dd/yy, month/day/year] Previous maximum discharge Flood of September 22, 1998 Station number and name Drainage area (mi2) Period of record Date mm/dd/yy Peak stage (feet) Maximum discharge (ft3/s) Peak stage (feet) Peak discharge (ft3/s) 50034000 16.7 1970-1982 9/10/1996 25.14 25,900 25.93 28,200 Río Bauta near Orocovis 1989-1998 50050900 6.0 1978-1998 9/10/1996 25.93 44,000 26.37 45,000 Río Grande de Loíza at Quebrada Arenas 50061800 9.84 1967-1998 9/13/1982 13.10 15,000 15.90 17,300 Río Canóvanas near Campo Rico 50064200 7.31 1967-1998 9/16/1975 15.50 17,400 19.30 22,000 Río Grande near El Verde 50074950 0.05 1992-1998 9/10/1996 10.74 102 10.78 104 Quebrada Guaba near Naguabo 50106100 3.5 1987-1998 1/8/1992 25.67 51,600 25.94 52,700 Río Coamo at Coamo 50113800 15.4 1989-1998 9/10/1996 10.62 10,600 12.42 16,200 Río Cerillos above Lago Cerrillos near Ponce 50124200 18.9 1981-1998 9/12/1982 20.40 14,700 21.88 18,700 Río Guayanilla near Guayanilla 50131990 34.6 1991-1998 1/6/1992 13.23 6,610 19.53 24,900 Río Guanajibo at Hwy 119 at San Germán 94.3 1963-1998 9/16/1975 33.90 140,000 34.50 163,000 Río Grande de Añasco near San Sebastián 50144000 6 WATER RESOURCES DATA FOR PUERTO RICO AND THE U.S. VIRGIN ISLANDS, 1998 Ground Water Ground-water levels in most aquifers in Puerto Rico and the U.S. Virgin Islands followed seasonal fluctuations associated with rainfall patterns during water year 1998. Generally, late into the water year, the ground-water levels increased in response to above-normal rainfall from July through November, especially during the passage of Hurricane Georges, on September 21-22, 1998, which caused flooding throughout most of the coastal plains. Ground-water levels generally declined during the months of April, May, and July through August in response, primarily, to ground-water withdrawals for public and industrial use in the north coast, and irrigation in the south coast. Record-low and record-high water levels were recorded at several wells in Puerto Rico during water year 1998 (tables 3 and 4). Ground-water levels in the North Coast Limestone aquifer system of Puerto Rico fluctuated from October to August in response to seasonal rainfall patterns and sustained ground-water withdrawals. This trend was altered by the rainfall produced by Hurricane Georges in late September, which caused water levels to rise significantly at the Sabana Hoyos index well, where the ground-water levels rose 1.20 ft (fig. 2). In the South Coastal Plain aquifer system of Puerto Rico, the ground-water levels remained relatively stable from October to August, in response to above-normal rainfall runoff which may have neutralized the drawdown trend from sustained ground­ water withdrawals for agricultural, public, and industrial use. A significant rise was recorded during September, when Hurricane Georges affected the area and ground-water levels rose 2.50 ft at the Alomar index well (fig. 2). In the U.S. Virgin Islands (St. Croix, St. Thomas, and St. John) ground-water levels rose significantly from mid-October to early December as heavy rainfall was recorded in the area. The ground-water levels generally declined from early December to mid-September in response to below-normal rainfall and sustained ground-level withdrawals. The declining trend was reversed by above-normal rainfall produced by the passage of Hurricane Georges by the area. At the Guinea Gut well, the ground-water levels rose about 15.50 ft (fig. 2). _____________________________________________________________________________________________________ _____________________________________________________________________________________________________ _____________________________________________________________________________________________________ _____________________________________________________________________________________________________ _____________________________________________________________________________________________________ _____________________________________________________________________________________________________ 7 WATER RESOURCES DATA FOR PUERTO RICO AND THE U.S. VIRGIN ISLANDS, 1998 Table 3. Highest ground-water levels recorded during 1998 water year and previous high ground-water levels at selected wells in Puerto Rico [PR, Puerto Rico; mm/dd/yy, month/day/year; ft-blsd, feet below land-surface datum; mm/yy, month/year] Well name or Local number number Location Previous 1998 highest Highest Period of water water record level Date level Date (mm/yy) (ft-blsd) (mm/dd/yy) (ft-blsd) (mm/dd/yy) Florida #01 FL-1 PR 08/96 to 09/98 139.90 09/20/96 137.91 09/22/98 La Esperanza 2 PN-2 PR 07/89 to 09/98 8.01 12/30/92 7.71 09/23/98 12/31/92 CJ-TW-19A CJ-TW-19A PR 06/92 to 09/98 22.60 09/14/96 22.07 09/25/98 09/26/98 09/27/98 Jardín Botánico #3 PN-19 PR 06/91 to 09/98 3.06 09/11/96 2.84 09/22/98 09/23/98 Yabucoa 7 96 PR 04/78 to 09/98 13.10 12/02/87 9.67 09/30/98 HW-TW-5B HW-TW-5B PR 04/88 to 09/98 7.89 05/26/92 5.93 09/22/98 Albergue de Niños Ponce AN-1 PR 03/92 to 09/98 35.29 06/22/92 28.57 09/27/98 Aguadilla Cement 200 PR 10/85 to 09/98 2.24 08/25/88 1.61 09/22/98 Table 4. Lowest ground-water levels recorded during 1998 water year and previous low ground-water levels at selected wells in Puerto Rico [PR, Puerto Rico; mm/dd/yy, month/day/year; ft-blsd, feet below land-surface datum; mm/yy, month/year] Well name or Local number number Location Previous 1998 lowest lowest Period of water water record level Date level Date (mm/yy) (ft-blsd) (mm/dd/yy) (ft-blsd) (mm/dd/yy) Encantada 1 EN-1 PR 08/96 to 09/98 313.74 07/05/98 313.84 04/03/98 07/06/97 Palo Alto 2 PA-2 PR 05/96 to 09/98 240.04 08/12/96 240.14 08/18/98 to 08/15/96 Phillips 13 P-13 PR 09/91 to 09/98 28.88 09/22/95 31.22 08/24/98 HW-TW-13 HW-TW-13 PR 04/88 to 09/98 48.10 11/06/92 48.12 09/03/98 11/07/92 Vivoni Col. Amistad 143 PR 10/85 to 09/98 40.70 09/26/97 40.85 10/08/97 10/09/97 CR-TW-9A CR-TW-9A PR 05/96 to 09/98 7.22 08/14/97 8.53 03/21/98 Figure 2. Ground-water levels at selected wells in Puerto Rico and the U.S. Virgin Islands. 8 WATER RESOURCES DATA FOR PUERTO RICO AND THE U.S. VIRGIN ISLANDS, 1998 October November December January February March April May June July August September 1998 40