Resource Type
Serial/Series Title
States
628 Matching Results
Results open in a new window/tab.
Results:
1 - 24 of
628
next
Reservoir Development Impacts on Surface-Water Quantity and Quality in the Yampa River Basin, Colorado and Wyoming
From introduction: This report describes the results of an investigation in which three computer models were used to evaluate different levels of the proposed reservoir development. One model simulated streamflow conditions with alternative multireservoir configurations; a second model simulated the dissolved-solids concentrations at various locations in the basin; and a third model used streamflows and dissolved solids concentrations to simulate the water-quality conditions within certain proposed reservoirs. This study was designed to demonstrate the application of computer-modeling techniques in evaluating impacts of proposed reservoirs.
Date:
1983
Creator:
Adams, D. Briane; Bauer, Daniel P.; Dale, Robert H. & Steele, Timothy Doak
Object Type:
Report
System:
The UNT Digital Library
Availability and Chemical Quality of Water From Surficial Aquifers in Southwest Minnesota
From introduction: The objectives of the study were to (1) determine the areal extent, thickness, and water-yielding capability of aquifers in the surficial deposits, (2) estimate the amount of water in storage in the aquifers, (3) determine the chemical quality of water in the aquifers and, (4) establish observation wells to monitor the effects of ground-water development on water levels and storage in the aquifers.
Date:
1983
Creator:
Adolphson, D. G.
Object Type:
Report
System:
The UNT Digital Library
Designation of Principal Water-Supply Aquifers in Minnesota
From introduction: The purpose of this report is to describe the general quality and quantity of water in the principal water-supply aquifers in Minnesota.
Date:
August 1981
Creator:
Adolphson, D. G.; Ruhl, J. F. & Wolf, R. J.
Object Type:
Report
System:
The UNT Digital Library
Water Resources of the Maunabo Valley, Puerto Rico
Report providing information about the water resources of the Munabo Valley in southeastern Puerto Rico, including the principal source of water, chemical composition, hydraulic conductivities, average transmissivity, and suggestions for water supplementation.
Date:
May 1977
Creator:
Adolphson, D. G.; Seijo, M. A. & Robison, T. M.
Object Type:
Report
System:
The UNT Digital Library
Determination of Dissolved Aluminum in Water Samples
From introduction: The purpose of this report is to test the accuracy and precision of the MIBK extract technique and its suitability for A1 determination in rain, surface waters, ground waters, and effluents obtained from leaching various types of rocks with acidified water. The present study investigates the accuracy, precision, and detection limit of this technique and reports methods for improvement. The purpose of the report also is to test the effect of filtration of water samples and the storage of samples in conventional polythylene (CPE), linear polythylene (LPE), and polypropyene (PP) bottles on accuracy of A1 determination.
Date:
1983
Creator:
Afifi, Afifa A.
Object Type:
Report
System:
The UNT Digital Library
Considerations for Monitoring Water Quality of the Schenectady, Schenectady County, New York
This report evaluates six public water-supple systems in Schenectady County to create a recommendation of how to monitor these sites. It contains maps and tables.
Date:
January 1981
Creator:
Allen, Ronald V. & Waller, Roger M.
Object Type:
Report
System:
The UNT Digital Library
Hydrologic Effects of Annually Diverting 131,000 Acre-Feet of Water from Dillon Reservoir, Central Colorado
From abstract: because of the increased demands for water in eastern Colorado, principally in the urbanizing Denver metropolitan area, increased diversions of water from Dillon Reservoir are planned. Estimates of end-of-month storage in Dillon Reservoir, assuming the reservoir was in place and 131,000 acre-feet of water were diverted from the reservoir each year, were reconstructed by mass balance for the 1931-77 water years. Based on the analysis, the annual maximum end-of-month drawdown below the elevation at full storage would have been 171 feet.
Date:
January 1979
Creator:
Alley, W. M.; Bauer, D. P.; Veenhuis, J. E. & Brennan, Robert
Object Type:
Report
System:
The UNT Digital Library
Flow Routing in the Susquehanna River Basin: Part III -- Routing Reservoir Releases in the Tioga and Chemung Rivers System, Pennsylvania and New York
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.
Date:
July 1979
Creator:
Ambruster, Jeffrey T.
Object Type:
Report
System:
The UNT Digital Library
Ground Water in the Lajas Valley, Puerto Rico
Abstract: Lajas Valley is plagued with problems of salinity and waterlogging the soils. Use of brackish (500 milligrams per liter) irrigation compounded ground water for the problem until an irrigation-drainage system was constructed in 1955. Lajas is an alluvium-filled limestone highlands. The alluvium, mostly clay and as much 300 feet (90 meters) thick, contains brackish ground water except in the recharge areas located along the foothills...Results from a digital model show that a network of discharge wells could alleviate waterlogging of the soils in the artesian area.
Date:
March 1977
Creator:
Anderson, Henry R.
Object Type:
Report
System:
The UNT Digital Library
Ground Water in the San Juan Metropolitan Area, Puerto Rico
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.
Date:
July 1976
Creator:
Anderson, Henry R.
Object Type:
Report
System:
The UNT Digital Library
Water Quality and Streamflow Characteristics, Raritan River Basin, New Jersey
Abstract: The findings of a problem-oriented, river-system investigation of the water quality and streamflow characteristics of the Raritan River, N.J. are described. Information on streamflow duration, time-of-travel measurements, and analyses of chemical, biochemical and physical-water quality are summarized and used to define relations existing between water quality, streamflow, geology, and environmental development in the basin's hydrologic system. Stream quality, particularly in the lower urban areas of the basin, is shown to be deteriorating with time at most of the sampling sites reported. For example, average dissolved-oxygen concentration is reported to be undersaturated at all sampling sites and is decreasing with time at most sites. Biochemical-oxygen demand is increasing at most sites, as are the dissolved-solids content.
Date:
June 1974
Creator:
Anderson, Peter W. & Faust, Samuel D.
Object Type:
Report
System:
The UNT Digital Library
Present and Potential Sediment Yields in the Yampa River Basin, Colorado and Wyoming
This report tracks and analyses the annual sediment yield for the Yampa River basin in Colorado and Wyoming. It includes maps, tables, and graphs.
Date:
December 1978
Creator:
Andrews, Edmund D.
Object Type:
Report
System:
The UNT Digital Library
Water Quality of Lake Arlington on Village Creek, North-Central Texas 1973 to 1981
From purpose and scope: The purpose of this report is to describe and explain the historical, seasonal, and areal variations in the water quality of Lake Arlington between January 29, 1973, and August 20, 1981.
Date:
1983
Creator:
Andrews, Freeman L. & Gibbons, Willard J.
Object Type:
Report
System:
The UNT Digital Library
Flow Routing in the Susquehanna River Basin: Part I- Effects of Raystown Lake on the Low-Flow Frequency Characteristics of the Juniata and Lower Susquehanna Rivers, Pennsylvania
From introduction: The purpose of the study is to determine the effects of a new reservoir, Raystown Lake, on downstream low-flow frequency characteristics.
Date:
April 1977
Creator:
Armbruster, Jeffrey T.
Object Type:
Report
System:
The UNT Digital Library
Regional Stochastic Generation of Streamflows using an Arima (1, 0, 1) Process and Disaggregation
From abstract: An ARIMA (1, 0, 1) model is used to generate annual flow sequence at three sites in the Juniata River basin, Pennsylvania. The study was designed to analyze low-flow frequency characteristics of a basin. The model preserves the mean, variance, and cross-correlations of the observed station data.
Date:
May 1979
Creator:
Armbruster, Jeffrey T.
Object Type:
Report
System:
The UNT Digital Library
Technical Manual For Estimating Low-Flow Frequency Characteristics of Streams in the Susquehanna River Basin
Abstract: This report presents procedures for estimating low-flow frequency characteristics for streams in the Susquehanna River basin. The techniques can be used at ungaged sites as well as sites where insufficient data are available to make a reliable estimate. Streams have been divided into two types major and minor. Major streams are the Susquehanna, West Branch Susquehanna, Juniata, and Chemung Rivers. Points on these streams with drainage areas of more than 2,000 square miles (5,180 kilometers) are included in this category. Points on these streams with drainage areas of less than 2,000 square miles fall into the minor stream category. Generally minor streams are herein defined as those draining less than 2,000 square miles (5,180 kilometers). Multiple-regression techniques have been used to develop relations for estimating the 1-, 3-, 7-, 30-, and 183-day duration low flows at recurrence intervals of 10, 20, 50 and 100 years for annual series data and the 1-, 3-, 7-, and 30-day duration low flows, at the same recurrence intervals, for six individual months, May through October, inclusive.
Date:
June 1976
Creator:
Armbruster, Jeffrey T.
Object Type:
Report
System:
The UNT Digital Library
Evaluation of the Effects of Lake Audubon on Ground- and Surface-Water Levels in the Lake Nettie Area, Eastern Mclean County, North Dakota
Purpose and scope: The purpose of this investigation is to describe changes in the ground-water levels and levels of surface-water bodies and to ascertain whether those changes can be ascribed to the raising of the level of Lake Audubon, or to the subsequent filling of the McClusky Canal, or both. The changes will be determined by analysis of water-level records obtained from observation wells.
Date:
1983
Creator:
Armstrong, C. A.
Object Type:
Report
System:
The UNT Digital Library
Geohydrology of the Meadowbrook Artificial-Recharge Site at East Meadow, Nassau County, New York
Purpose and scope: The Meadowbrook artificial-recharge project, a cooperative effort between the U.S. Geological Survey and the Nassau County Department of Public Works (NCDPW) since 1975, is intended to demonstrate the feasibility of using reclaimed wastewater to replenish and improve the quality of Long Island's ground water. This report presents the results of geologic, hydrologic, and hydrochemical studies that were done at the Meadowbrook artificial-recharge site to define conditions prevailing before the start of recharge operations.
Date:
1983
Creator:
Aronson, David A.; Lindner, Juli B. & Katz, Brian G.
Object Type:
Report
System:
The UNT Digital Library
Effects of Urbanization on the Water Quality of Lakes in Eagan, Minnesota
This report uses data collected from seventeen lakes and ponds in Eagan, Minnesota from 1972 through 1978 to determine the effects of urbanization on water quality. It contains a map, graphs, and tables.
Date:
August 1980
Creator:
Ayers, Mark A.; Payne, Gregory A. & Have, Mark R.
Object Type:
Report
System:
The UNT Digital Library
Ground-Water Resources of the Glacial Outwash Along the White River, Johnson and Morgan Counties, Indiana
From abstract: A two-dimensional digital model of the ground-water-flow system was constructed to test the conceptual model of the system ad to study the effects of development on ground-water levels and flow in the White River.
Date:
November 1982
Creator:
Bailey, Zelda Chapman & Imbrigiotta, Thomas E.
Object Type:
Report
System:
The UNT Digital Library
Effects of Ground-Water Development on the Proposed Palmetto Bend Dam and Reservoir in Southeast Texas
Abstract: Ground water continues to discharge into the Navidad and Lavaca Rivers by seepage out-flow even though large amounts of ground water are pumped for irrigation. Although a reduction in streamflow probably has occurred, a complete loss of the low flow of the streams by infiltration to a lowered water table seems remote. The large ground-water withdrawals will continue to cause land-surface subsidence, which will range from 0.012 foot to more than 0.026 foot per year. A minimum of about 0.013 to 0.015 foot of annual subsidence at the upper ends of the proposed reservoir and a maximum of about 0.019 foot near the dam site can be expected. Structural failures of manmade features have not occurred from the subsidence, but regional changes in the land slope have occurred and will continue . Numerous fault traces have been mapped in the area, but most of the faults are inactive. If movement along the fault planes should occur, the vertical displacement probably will not exceed the total subsidence.
Date:
May 1973
Creator:
Baker, E. T., Jr. & Follett, C. R.
Object Type:
Report
System:
The UNT Digital Library
Preliminary Plasma Spectrometric Analyses for Selected Elements in some Geothermal Waters from Cerro Prieto, Mexico
Abstract: As part of a cooperative study with the Geologic Division of the U.S. Geological Survey, water samples collected from geothermal power production wells at Cerro Prieto, Mexico, were analyzed for selected elements by d.c. argon plasma emission spectroscopy. Spectral interferences due to the presence of high concentrations of Ca, Si, Na, and K in these waters affected the apparent concentration values obtained. These effects were evaluated and correction techniques were developed and applied to the analytical values. Precipitates present in the samples at the time of analysis adversely affected the accuracy, precision and interpretability of the data.
Date:
1983
Creator:
Ball, James W.
Object Type:
Report
System:
The UNT Digital Library
Bacterial Water-Quality of Tulpehocken Creek Basin, Berks and Lebanon Counties, Pennsylvania
This report presents the findings of a four month study designed to determine "the bacterial quality of the water in the Tulpehocken Creek basin." It includes maps and tables.
Date:
April 1978
Creator:
Barker, James L.
Object Type:
Report
System:
The UNT Digital Library
Water-Quality Assessment of Francis E. Walter Reservoir, Luzerne and Carbon Counties, Pennsylvania
Objectives and scope: The principal objectives of this study were to assess the past and current water quality of the impoundment, its major tributaries, and its discharge, and to address the environmental impact of raised pool levels. Data collection was directed toward documenting the temporal and spatial variations in physical, chemical, and biological characteristics of the water, to estimate annual nutrient and suspended sediment loading, and to determine the algal biomass, dominant genera, algal growth potential, and limiting nutrient.
Date:
June 1983
Creator:
Barker, James L.
Object Type:
Report
System:
The UNT Digital Library