This report evaluates a cavity-riddled zone of an aquifer near Riviera Beach, Florida. It includes maps, graphs, and other figures.

Purpose and scope: The U.S. Marine Corps conducts training maneuvers in the study area. Lack of a local source of water has severely limited the utilization of the area. In the past, limited quantities of water have been transported to the area by truck or helicopter. The purpose of this study was to determine the feasibility of obtaining a supply of ground water in the area for use when field maneuvers are being conducted. The major effort for this study was concentrated on the part within the Marine Corps base boundary. The study involved the assessment of ground-water quality, ground water in storage, and aquifer characteristics.

This report presents the water-quality data of Raystown Lake, Pennsylvania, discussing its physical, biological, and chemical properties. This report also includes several tables and figures.

Abstract: The Lake Minnequa area, located immediately south of the Arkansas River, is mantled with as much as 46 feet (14 meters) of alluvium covering bedrock of Pierre Shale and Niobrara Formation. Surface water enters the area by the Minnequa Canal and the St. Charles Flood Ditch. The water is stored in Lake Minnequa and other reservoirs. Seepage from St. Charles Reservoirs No. 2 and No. 3 is the major source of water to the alluvial aquifer. The depth of the water table ranges from 0 to 40 feet (0 to 12.2 meters). A 0.5-square-mile (1.3-square-kilometers) area immediately south of Lake Minnequa has a water table less than 6 feet (1.8 meters) below land surface. Lake Minnequa is the principal cause of the shallow water table and resulting waterlogged soil. The bedrock hill east of Lake Minnequa and ground-water flow also contribute to the problem. To eliminate the waterlogging problem, the water table would have to be at least 6 feet (1.8 meters) below land surface. Possible alternatives for eliminating the problem include lowering the water, level in Lake Minnequa, placing a network of dewaterinq wells, or constructing a drainage system in the waterlogged area.

From introduction: This report contains geohydrologic and water-quality data, hydrologic testing methods, and preliminary interpretations related to the site area and it supplements a report in which the regional hydrogeologic regime was described (Mercer and Orr, 1977).

From abstract: Channel-routing models were used to route hypothetical releases from reservoirs in the upper Tioga River basin, Pennsylvania. These releases were routed northward down the Tioga River to Lindley, Erwins, and Corning, New York; combined with flows routed down the Cohocton River from Campbell to Corning, New York; and then routed southeastward down the Chemung River from Corning to Chemung, New York. The models used to route the flows of Cohocton and Chemung Rivers accounted for bank-storage discharge and streamflow depletion by well pumpage. In general, 17 years of concurrent streamflow data were available for model calibration and verification.

From introduction: The purpose of the study was to describe the differences between ponds that developed within and abandoned mine site and in control ponds not affected by mining.

From introduction: The purpose of this report is to describe the hydrologic system in the Lake Wingra basin, with particular emphasis on the hydrolic budget of the lake itself.

Abstract: Details of additions and modifications to a computer code described in an earlier report entitled "A model for calculating effects of liquid waste disposal in deep saline aquifers,: USGS WRI 76-61, NTIS-PB256 903/AS are documented. These additions and modifications include free water surface, vertical recharge, equilibrium controlled linear absorption and a first order irreversible rate reaction. These, plus additional modifications, make this model more adaptable to general hydrologic problems and those involving waste disposal with simple chemical reactions.

Abstract: The discharge-weighted average concentrations of dissolved solids, chloride, and sulfate for many of the principal streams in Texas are less than 500 mg/1 (milligrams per liter), 250 mg/1, and·250 mg/1, respectively. At 65 of 131 sites on streams that were sampled at least 10 times, the biochemical oxygen demand of at· least half the samples exceeded 3,0 mg/1. At 20 of the sites, the dissolved-oxygen content of at least !half the samples was less than 5.0_ mg/1. The higher concentrations of minor elements usually were detected in waters from urban areas, indicating a relation to man's activities. Small amounts of some pesticides are widely distributed in low concentrations. The higher concentrations usually were detected in waters from urban areas. Small amounts of some of the pesticides studied are widely distributed in surface waters in Texas. Some of the more widely distributed pesticides were 2,4,5-T at 96 sites, diazinon at 80 sites, 2,4-D at 78 sites, dieldrin at 77 sites, Silvex at 47 sites, DDT at 67 sites, lindane at 59 sites, DDD at 51 sites, DDE at SO sites, and chlordane at 38 sites.

This report analyses the water quality of Lake George in Colorado and the four aquifers that feed into it. It includes maps and tables.

From Purpose and Objectives: This study was made primarily to provide a means to depict and forecast stream quality based on known causative or apparent correlative factors.

This report presents the results of a "multiple-reach method-of-characteristics flow-simulation model" applied to a ten point eight mile portion of the Sacramento River in 1976. It includes a map, graphs, and a table.

From abstract: This report presents the results of a "three-phase study [. . .] to determine the effects of varying release rates through the power-outlet works at Sam Rayburn Reservoir on aeration capacity of a fourteen-mile reach of the Angelina River below Sam Rayburn Dam." It includes a map, graphs, and tables.

This report uses log analysis methods to analyze and compare "geologic and hydrologic data obtained from well tests and core studies," focusing specifically on the Edwards aquifer in Texas. It contains maps, tables, and figures.

From abstract: This report presents data collected from four lakes in Lakeville, Minnesota to determine water-quality characteristics and evaluate "changes that may occur in the lakes because of urbanization." It contains a map, graphs, tables, and a glossary.

Abstract: The Tioga River and its major tributaries were sampled monthly from September 1973 to May 1975. Water quality in the Tioga River is degraded by acid-mine drainage entering the stream near Blossburg from both strip- and deep-mined areas. The stream supports few species of aquatic life from Blossburg to its confluence with Crooked Creek- Alkaline water of tributaries Mill Creek, Crooked Creek, and the Cowanesque River counteract the acidity carried downstream from Blossburg, and ·the water-quality of the Tioga River gradually improves, supporting a more diversified population of fish and aquatic life. Relationships between selected water-quality parameters have been developed for the sampling stations throughout the basin. Downstream trends were also examined. The relationships will be further refined and implemented in predictive water-quality models as more data are collected.

Abstract: Nine artificial-recharge pits were excavated in the alluvium in upper Black Squirrel Creek basin, Jimmy Campy Valley, and in the alluvium overlying the Widefield aquifer in Fountain Valley. Each artificial-recharge site was instrumented to measure inflow, stage fluctuations, and water-table fluctuations. Artificial-recharge tests conducted in upper Black Squirrel Creek basin indicated that the average adjusted rates of infiltration for the three sites ranged from 1.6 to 2.4 feet (0.5 to 0.7 meter) per day. Tests conducted in Jimmy Camp Valley indicated that the average adjusted rates of infiltration for the two sites ranged from 3.8 to 24.7 feet (1.2 to 7.5 meters) per day. Tests conducted on the Widefield aquifer indicated that the average adjusted rates of infiltration for four sites ranged from 2.3 to 12.9 feet (0.7 to 3.9 meters) per day.

From abstract: This report provides "a hydrologic analysis of the proposed Badger-Beaver Creeks artificial-recharge project . . . made with the aid of three digital computer models." It includes maps, graphs, and tables.

From abstract: A hydrologic analysis based on available data, test drilling, seismic refraction profiling, and the stream-aquifer connection was performed using a digital computer model. The report presents its findings on the quality and availability of the ground and surface water of the Pootatuck River Valley in Connecticut.

From introduction: A post-drought analysis of the sources of water supply for the metropolitan area indicated a need for better knowledge of the ground-water resources. A study was implemented through the cooperative water-resources investigation program between Commonwealth agencies of Puerto Rico and the U.S. Geological Survey.

From introduction: This report presents the results of an investigation of the quality of water in the French Broad River at Marshall, N.C., that is based on data collected during the period 1958-77. Major objectives of the study were: (1) to define variations in water quality; (2) to determine the degree to which the quality of water in the river is affected by man's activities; and, (3) to identify past and present trends in the chemical quality of water in the river.

From introduction: The purpose of this investigation is to provide the additional geohydologic information needed for Monterey County to develop plans for the optimum utilization of its water resources--particularly in the Prunedale and Aroms areas.

Abstract: Seven test holes drilled in the Glacial Lake Agassiz Peatlands indicate that the thickness of surficial materials along a north-south traverse parallel to Minnesota Highway 71 ranges from 163 feet near Blackduck, Minnesota to 57 feet about 3 miles south of Upper Red Lake. Lenses of sand and gravel occur immediately above bedrock on the Itasca moraine and are interbedded with lake clay and till under the peatlands. Vertical head gradients measured in a piezometer nest near Blackduck on the moraine are downward, indicative of recharge to the regional ground-water-flow system. Vertical head gradients are upward in a piezometer nest on a sand beach ridge in the peatlands 12 miles north of Upper Red Lake. Numerical sectional models indicate that this discharge probably comes from local flow systems recharge from ground-water mounds located under large raised bogs.