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Page 3887, results 97151 - 97175

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Not all publications have extents, not all extents are completely accurate
Hydrostatigraphic characterization of coastal aquifer by geophysical log analysis, Cape Cod National Seashore, Massachusetts
Roger H. Morin, Daniel W. Urish
1995, Log Analyst (36) 27-37
The Cape Cod National Seashore comprises part of Provincetown, Massachusetts, which lies at the northern tip of Cape Cod. The hydrologic regime in this area consists of unconsolidated sand-and-gravel deposits that constitute a highly permeable aquifer within which is a freshwater lens floating on denser sea water. A network of...
Nitrate transport and transformation processes in unsaturated porous media
James A. Tindall, Robin L. Petrusak, Peter B. McMahon
1995, Journal of Hydrology (169) 51-94
A series of experiments was conducted on two contrasting agricultural soils to observe the influence of soil texture, preferential flow, and plants on nitrate transport and denitrification under unsaturated conditions. Calcium nitrate fertilizer was applied to the surface of four large undisturbed soil cores (30 cm diameter by 40 cm...
Methods for estimating the magnitude and frequency of peak discharges of rural, unregulated streams in Virginia
James A. Bisese
1995, Water-Resources Investigations Report 94-4148
Methods are presented for estimating the peak discharges of rural, unregulated streams in Virginia. A Pearson Type III distribution is fitted to the logarithms of the unregulated annual peak-discharge records from 363 stream-gaging stations in Virginia to estimate the peak discharge at these stations for recurrence intervals of 2 to...
Photogeologic map showing distribution of sinkholes south of Fairplay, Park County, Colorado — A possible geologic hazard
D. R. Shawe, T. A. Steven, R. B. Taylor, C. H. Maxwell
1995, Miscellaneous Field Studies Map 2295
A large group of at least 50, and perhaps significantly more, sinkholes partially surrounds Black Mountain 6-10 mi south Fairplay in South Park, Park County, Colorado. The sinkholes occur in bedrock in the evaporite facies of the Middle Pennsylvania Minturn Formation, and in Quaternary soil, alluvium, and glacial outwash gravels...
Water-resources activities, North Dakota District, fiscal year 1994-95
1995, Open-File Report 95-105
The mission of the U.S. Geological Survey, Water Resources Division, is to provide the hydrologic information and understanding needed for the optimum utilization and management of the Nation's water resources for the overall benefit of the people of the United States. This report describes water-resources activities of the Water Resources...
Review of sediment data in the South Platte River Basin, Colorado, 1980-92
Janet S. Heiny
1995, Fact Sheet 153-95
Suspended-sediment transport and its relation to water quality are important issues in the South Platte River Basin. Most sediment enters the South Platte River during snowmelt runoff from March to June. The suspended sediment varies by particle size, concentration, and load. Suspended-sediment data in the South Platte River for water...
Water quality of the Boca Raton canal system and effects of the Hillsboro Canal inflow, southeastern Florida, 1990-91
D.J. McKenzie
1995, Water-Resources Investigations Report 94-4128
The City of Boca Raton in southeastern Palm Beach County, Florida, is an urban residential area that has sustained a constant population growth with subsequent increase in water use. The Boca Raton network of canals is controlled to provide for drainage of excess water, to maintain proper coastal ground-water levels...
Map showing potential metal-mine drainage hazards in Colorado, based on mineral-deposit geology
Geoffrey S. Plumlee, Randall K. Streufert, Kathleen S. Smith, Steven M. Smith, Alan R. Wallace, Margo I. Toth, J. Thomas Nash, Rob A. Robinson, Walter H. Ficklin, Gregory K. Lee
1995, Open-File Report 95-26
This map, compiled by the U.S. Geological Survey (USGS) in cooperation with the Colorado Geological Survey (CGS) and the U. S. Bureau of Land Management (BLM), shows potential mine-drainage hazards that may exist in Colorado metal-mining districts, as indicated by the geologic characteristics of the mineral deposits that occur in...
Reconnaissance investigation of water quality, bottom sediment, and biota associated with irrigation drainage in the Dolores Project area, southwestern Colorado and southeastern Utah, 1990-91
D. L. Butler, R. P. Krueger, B. C. Osmundson, E.G. Jensen
1995, Water-Resources Investigations Report 94-4041
Water, bottom-sediment, and biota samples were collected in 1990-91 to identify water-quality problems associated with irrigation drainage in the Dolores Project area. Concentrations of cadmium, mercury, and selenium in some water samples exceeded aquatic-life criteria. Selenium was associated with irrigaton drainage from the Dolores Project, but other trace elements may...
Virus and bacteria transport in a sandy aquifer, Cape Cod, MA
Roger C. Bales, Shimin Li, Kimberly M. Maguire, Moyasar T. Yahya, Charles P. Gerba, Ronald W. Harvey
1995, Groundwater (33) 653-661
Transport of the bacteriophage PRD-1, bacteria, and latex microspheres was studied in a sandy aquifer under natural-gradient conditions. The field injection was carried out at the U.S. Geological Survey's Toxic Substances Hydrology research site on Cape Cod. The three colloids and a salt tracer (Br−) moved along the same path....