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Page 1933, results 48301 - 48325

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Estimates of average annual tributary inflow to the lower Colorado River, Hoover Dam to Mexico
Sandra J. Owen-Joyce
1987, Water-Resources Investigations Report 87-4078
Estimates of tributary inflow by basin or area and by surface water or groundwater are presented in this report and itemized by subreaches in tabular form. Total estimated average annual tributary inflow to the Colorado River between Hoover Dam and Mexico, excluding the measured tributaries, is 96,000 acre-ft or about...
Estimates of consumptive use and ground-water return flow using water budgets in Palo Verde Valley, California
Sandra J. Owen-Joyce, Steven L. Kimsey
1987, Water-Resources Investigations Report 87-4070
Palo Verde Valley, California, is an agricultural area in the flood plain of the Colorado River where irrigation water is diverted from the river and groundwater is discharged to a network of drainage ditches and (or) the river. Consumptive use by vegetation and groundwater return flow were calculated using water...
Geophysical well log analysis of fractured granitic rocks at Atikokan, Ontario, Canada
Frederick L. Paillet, A.E. Hess
1987, Water-Resources Investigations Report 87-4154
Two boreholes, drilled to approximate depths of 750 and 1,260 m in a granitic intrusion located near Atikokan, Ontario, were studied by obtaining a full suite of conventional borehole geophysical logs. In addition, selected intervals in these boreholes were logged with a borehole acoustic televiewer that produces a high-resolution image...
Calibration of a dissolved-solids model for the Yampa River basin between Steamboat Springs and Maybell, northwestern Colorado
R. S. Parker, D. W. Litke
1987, Water-Resources Investigations Report 86-4190
The cumulative effects of changes in dissolved solids from a number of coal mines are needed to evaluate effects on downstream water use. A model for determining cumulative effects of streamflow, dissolved-solids concentration, and dissolved-solids load was calibrated for the Yampa River and its tributaries in northwestern Colorado. The model...
Selected chemical analyses of water from formations of Mesozoic and Paleozoic age in parts of Oklahoma, northern Texas, and Union County, New Mexico
R.S. Parkhurst, S. C. Christenson
1987, Water-Resources Investigations Report 86-4355
Hydrochemical data were compiled into a data base as part of the Central Midwest Regional Aquifer System Analysis project. The data consist of chemical analyses of water samples collected from wells that are completed in formations of Mesozoic and Paleozoic age. The data base includes data from the National Water...
Hydrogeology and water quality of areas with persistent ground-water contamination near Blackfoot, Bingham County, Idaho
D. J. Parliman
1987, Water-Resources Investigations Report 87-4150
The Groveland-Collins area near Blackfoot, Idaho, has a history of either periodic or persistent localized groundwater contamination. Water users in the area report offensive smell, metallic taste, rust deposits, and bacteria in water supplies. During 1984 and 1985, data were collected to define regional and local geologic, hydrologic, and groundwater...
Revised techniques for estimating peak discharges from channel width in Montana
Charles Parrett, J. A. Hull, R. J. Omang
1987, Water-Resources Investigations Report 87-4121
This study was conducted to develop new estimating equations based on channel width and the updated flood frequency curves of previous investigations. Simple regression equations for estimating peak discharges with recurrence intervals of 2, 5, 10 , 25, 50, and 100 years were developed for seven regions in Montana. The...
Relation of sediment and nutrient loads to watershed characteristics and land use in the Otisco Lake basin, Onondaga County, New York
J.E. Paschal, D. A. Sherwood
1987, Water-Resources Investigations Report 86-4026
Otisco Lake, the smallest and easternmost of New York State 's Finger Lakes, is the source of water supply for several villages in Onondaga County. In recent years, turbidity and algal blooms have periodically impaired the lake 's use for both water supply and recreation. Principal land uses within the...
Quality-assurance data for routine water analysis in the laboratories of the US Geological Survey for water-year 1984
Dale B. Peart, Hoyt B. Sutphin
1987, Water-Resources Investigations Report 87-4077
The U.S. Geological Survey maintains a quality-assurance program based on the analysis of reference samples for its two water-analysis laboratories located in Atlanta, Georgia, and Denver, Colorado. Reference samples containing selected inorganic constituents are prepared at the U.S. Geological Survey's Ocala, Florida, office, disguised as routine samples, and sent daily...
Sensitivity analysis of a multilayer, finite-difference model of the southeastern Coastal Plain regional aquifer system: Mississippi, Alabama, Georgia, and South Carolina
Meribeth Pernik
1987, Water-Resources Investigations Report 87-4108
The sensitivity of a multilayer finite-difference regional flow model was tested by changing the calibrated values for five parameters in the steady-state model and one in the transient-state model. The parameters that changed under the steady-state condition were those that had been routinely adjusted during the calibration process as part...
Water quality of Fremont Lake and New Fork Lakes, western Wyoming: A progress report
D. A. Peterson, R. C. Averett, K. L. Mora
1987, Water-Resources Investigations Report 86-4016
Fremont Lake and New Fork Lakes in the New Fork River drainage of western Wyoming were selected for a comprehensive study of hydrologic processes affecting mountain lakes in the Rocky Mountains. Information is needed about lakes in this area to assess their response to existing and planned development. The concerns...
Ground-water-recharge rates in Nassau and Suffolk counties, New York
D.S. Peterson
1987, Water-Resources Investigations Report 86-4181
Groundwater is the sole source of freshwater in Nassau and Suffolk Counties on Long Island; therefore, the rate at which precipitation replenishes the groundwater system may affect future water supplies in some areas. Annual precipitation on Long Island averages 45 inches per year, but less than 23 inches , or...
Description and comparison of selected models for hydrologic analysis of ground-water flow, St. Joseph River basin, Indiana
J. G. Peters
1987, Water-Resources Investigations Report 86-4199
The Indiana Department of Natural Resources (IDNR) is developing water-management policies designed to assess the effects of irrigation and other water uses on water supply in the basin. In support of this effort, the USGS, in cooperation with IDNR, began a study to evaluate appropriate methods for analyzing the effects...
Hydrogeologic characteristics of the Lee Acres Landfill Area, San Juan County, New Mexico
K. D. Peter, R. A. Williams, K. W. King
1987, Water-Resources Investigations Report 87-4246
Identification of the presence of volatile organic compounds in liquid-waste lagoons in New Mexico at the Lee Acres landfill, beneath a refinery south of the landfill, and in nearby residential wells has led to an hydrologic investigation of the area. The alluvium underlying an arroyo adjacent to the landfill mostly...
Water levels, chloride concentrations, and pumpage in the coastal aquifers of Delaware and Maryland
D. J. Phelan
1987, Water-Resources Investigations Report 87-4229
The Manokin, Ocean City, Pocomoke, and unconfined aquifers of coastal Delaware and Maryland are susceptible to saltwater intrusion from inland movement of offshore water, and from vertical leakage from the bays and deeper aquifer. Comparison of data for water levels, chloride, and pumpage affected during 1974-86 shows that, with the...
Effects of surface runoff and treated wastewater recharge on quality of water in the Floridan aquifer system, Gainesville Area, Alachua County, Florida
G. G. Phelps
1987, Water-Resources Investigations Report 87-4099
Rates of recharge to the Floridan aquifer system at four sites in Alachua County were estimated and water samples were analyzed to determine if the recharge water had any effects on the water quality of the aquifer. A total of about 33 million gal/day (mgd) recharges the upper part of...
Hydrogeology in the area of a freshwater lens in the Floridan aquifer system, northeast Seminole County, Florida
G. G. Phelps, K.P. Rohrer
1987, Water-Resources Investigations Report 86-4078
Northeast Seminole County, Florida, contains an isolated recharge area of the Floridan aquifer system that forms a freshwater lens completely surrounded by saline water. The freshwater lens covers an area of about 22 sq mi surrounding the town of Geneva, and generally is enclosed by the 25 ft land surface...
Hydrogeology, degradation of ground-water quality, and simulation of infiltration from the Delaware River into the Potomac aquifers, northern Delaware
S.W. Phillips
1987, Water-Resources Investigations Report 87-4185
Brackish water is infiltrating from the Delaware River into the underlying Potomac aquifers in the Cretaceous Potomac Formation in northern Delaware. Evidence that infiltration at the river is actually occurring includes chloride concentrations in the aquifers that are above ambient levels and chemical characteristics of groundwater and river water that...
Hydrologic monitoring of selected streams in coal fields of central and southern Utah — Summary of data collected, August 1978-September 1984
Don Price, G.G. Plantz
1987, Water-Resources Investigations Report 86-4017
The U.S. Geological Survey conducted a coal-hydrology monitoring program in coal-field areas of central and southern Utah during August 1978-September 1984 to determine possible hydrologic impacts of future mining and to provide a better understanding of the hydrologic systems of the coal resource areas monitored. Data were collected at 19...
Analysis of sediment production from two small semiarid basins in Wyoming
J.G. Rankl
1987, Water-Resources Investigations Report 85-4314
Data were collected at two small, semiarid basins in Wyoming to determine the relation between rainfall, runoff, and sediment production. The basins were Dugout Creek tributary and Saint Marys Ditch tributary. Sufficient rainfall and runoff data were collected at Dugout Creek tributary to determine the source of sediment and the...
Comparison of estimates of evapotranspiration and consumptive use in Palo Verde Valley, California
Lee H. Raymond, Sandra J. Owen-Joyce
1987, Water-Resources Investigations Report 87-4071
Estimates of evapotranspiration and consumptive use by vegetation in Palo Verde Valley, California, were compared for calendar years 1981 to 1984. Vegetation types were classified, and the areas covered by each type were computed from Landsat satellite digital-image analysis. Evapotranspiration was calculated by multiplying the area of each vegetation type...