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Rene Garcia

Publications and source records attributed to Rene Garcia.

10 recordsLinked to original sources
USGS2004

Water Resources Data, Puerto Rico and the U.S. Virgin Islands, Water Year 2002

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, 2002.' This report includes records on both surface and ground water. Specifically, it contains: (1) discharge records for 95 streamflow gaging stations, daily sediment records for 28 streamflow stations, 27 partial-record or miscellaneous streamflow stations, stage records for 17 reservoirs, and (2) water-quality records for 17 streamflow-gaging stations, and for 42 ungaged stream sites, 11 lake sites, 2 lagoons, and 1 bay, and (3) water-level records for 102 observation wells.

Water Data Report↗
USGS2002

Water Resources Data, Puerto Rico and the U.S. Virgin Islands, Water Year 2001

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, 2001.' This report includes records on both surface and ground water. Specifically, it contains: (1) discharge records for 95 streamflow gaging stations, daily sediment records for 23 streamflow stations, 20 partial-record or miscellaneous streamflow stations, stage records for 18 reservoirs, and (2) water-quality records for 17 streamflow-gaging stations, and for 42 ungaged stream sites, 11 lake sites, 2 lagoons, and 1 bay, and (3) water-level records for 103 observation wells.

Water Data Report↗
USGS1998

Loads and yields of sediment and water-quality constituents in Kentucky streams

Loads and yields of sediment and water-quality constituents were estimated for selected Kentucky streams. Streamflow, sediment, and water-quality information were collected at a network of 44 stream stations in Kentucky. Mean daily discharge was synthesized using the drainage-area ratio, regression analysis, or a combination of the two techniques. Streamflow was partitioned into total and base flow and used to estimate loads and yields for sediment and water-quality constituents through the use of ESTIMATOR and FLUX software. The relative magnitude of constituent transport to streams from ground- and surface-water sources was determined for 20 of the 44 stations. Mean annual total-flow yields for suspended solids (residue, nonfilterable) ranged from 0.4 to 365 tons per square mile (tons/mi). The smallest mean annual total-flow yield for suspended solids was determined at Clarks Run at Almo; the largest was determined at Eagle Creek at Glencoe. The aggregate median value of the mean annual total-flow yield for suspended solids was 112 tons/mi2. The analysis of trace-metal data indicates that the largest mean annual total-flow yield of cadmium-0.039 tons/mil—was determined at Clarks River at Almo. This yield is approximately 20 times greater than the aggregate median value of the mean annual total-flow yields (0.002 tons/mi2). Nine (45 percent) of the stations had mean annual total-flow yields equal to the aggregate minimum value (0.001 tons/mi2). The maximum total-flow yield of chromium (0.009 tons/mi2) was determined at Eagle Creek at Glencoe. Clarks River at Almo had the smallest estimated mean annual total- and base-flow yields for chromium (less than 0.001 tons/mi2). The aggregate median value of the mean annual total-flow yield for copper was 0.007 tons/mi2. Barren River at Bowling Green and Clarks River at Almo had the largest estimated mean annual total-flow yields for copper (0.017 tons/mi2). The aggregate median of the mean annual total-flow yield for lead was 0.021 tons/mi2. Barren River at Bowling Green had the largest mean annual total-flow yield of lead (0.04 tons/mi2). Three stations—Beech Fork at Maud, Red River at Clay City, and South Fork Kentucky River at Booneville—had an estimate of mean annual total-flow yields of lead equal to the aggregate minimum of 0.004 tons/mi2. Analysis of the nutrient data indicates that the largest mean annual total-flow yield of nitrite plus nitrate (11.8 tons/mi2) was estimated at South Elkhorn Creek near Midway. This yield is nearly 10 times the aggregate median value (1.3 tons/mi2). The minimum annual total-flow yield of nitrite plus nitrate (0.419 tons/mi2) was estimated at Middle Fork Kentucky River at Tallega. Salt River at Glensboro had the largest mean annual total-flow yield of ammonia and organic nitrogen (206 tons/mi2). This is nearly 400 times the aggregate median value of the mean annual total-flow yield of 0.57 tons/mi2. The phosphorus yield (total flow) was greatest at Clarks River at Almo with 3.4 tons/mi2. This phosphorus yield is nearly 30 times the aggregate median value of the mean annual total-flow yield of 0.12 tons/mi2. The smallest mean annual total-flow yield for phosphorus (0.036 tons/mi2) was estimated at South Fork Kentucky River at Booneville. North Fork Kentucky River at Jackson had the smallest mean annual total-flow yield of ammonia (0.004 tons/mi2). The aggregate median value of the mean annual total-flow yield for ammonia was 0.93 tons/mi2.

Kentucky↗
USGS1995

Water-quality assessment of the Kentucky River Basin, Kentucky: Results of investigations of surface-water quality, 1987-90

The U.S. Geological Survey investigated the water quality of the Kentucky River Basin in Kentucky as part of the National Water-Quality Assessment program. Data collected during 1987-90 were used to describe the spatial and temporal variability of water-quality constituents including metals and trace elements, nutrients, sediments, pesticides, dissolved oxygen, and fecal-coliform bacteria. Oil-production activities were the source of barium, bromide, chloride, magnesium, and sodium in several watersheds. High concentrations of aluminum, iron, and zinc were related to surface mining in the Eastern Coal Field Region. High concentrations of lead and zinc occurred in streambed sediments in urban areas, whereas concentrations of arsenic, strontium, and uranium were associated with natural geologic sources. Concentrations of phosphorus were significantly correlated with urban and agricultural land use. The high phosphorus content of Bluegrass Region soils was an important source of phosphorus in streams. At many sites in urban areas, most of the stream nitrogen load was attributable to wastewater-treatment-plant effluent. Average suspended-sediment concentrations were positively correlated with discharge. There was a downward trend in suspended-sediment concentrations downstream in the Kentucky River main stem during the study. The most frequently detected herbicides in water samples were atrazine, 2,4-D, alachlor, metolachlor, and dicamba. Diazinon, malathion, and parathion were the most frequently detected organophosphate insecticides in water samples. Detectable concentrations of aldrin, chlordane, DDT, DDE, dieldrin, endrin, endosulfan, heptachlor, and lindane were found in streambed-sediment samples. Dissolved-oxygen concentrations were sometimes below the minimum concentration needed to sustain aquatic life. At some sites, high concentrations of fecal-indicator bacteria were found and water samples did not meet sanitary water-quality criteria.

Kentucky↗
USGS1987

Reconnaissance of Volatile Synthetic Organic Chemicals at Public Water Supply Wells Throughout Puerto Rico, November 1984-May 1985

INTRODUCTION Ground water is the principal source of drinking water for about 850,000 people in Puerto Rico (National Water Summary, 1985). Ground-water withdrawals for public supply, agricultural, and industrial water uses in Puerto Rico are about 250 million gallons per day (Mgal/d) (Torres-Sierra and Aviles, 1985). The development of the most accessible surface water supplies will result in an increasing demand for ground water. Recent investigations conducted by the U. S. Geological Survey, WRD (USGS) have shown the presence of toxic synthetic organic chemicals in ground water throughout Puerto Rico (Gomez-Gomez and Guzman-Rios, 1982). Volatile synthetic organic chemicals (VOC's) have been detected in water from public water supply wells in concentrations ranging from 1 to 500 micrograms per liter (Guzman-Rios and Quinones-Marquez, 1984 and Guzman-Rios and Quinones-Marquez, 1985). As result of these findings, pumpage was discontinued at 6 wells operated by the Puerto Rico Aqueduct and Sewer Authority (PRASA), the Commonwealth of Puerto Rico agency responsible for public-water supply. Monitoring of 10 additional wells in the vicinity of those wells is being conducted by the USGS in cooperation with PRASA. In 1985, the USGS began a comprehensive islandwide study of VOC's in drinking water. The study was conducted in cooperation with the Puerto Rico Department of Health (PRDOH) and PRASA. Samples were collected from 243 public-water supply wells operated by PRASA (flgure 1). The authors wish to acknowledge the support, assistance and cooperation of the PRASA staff throughout Puerto Rico in the sample collection effort. The authors are especially grateful to Engineer Carlos Garcia-Troche from the PRASA main office in San Juan.

Open-File Report↗