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Page 362, results 9026 - 9050

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Learning to live with geologic and hydrologic hazards
Paula L. Gori, Carolyn L. Driedger, Sharon L. Randall
1999, Water-Resources Investigations Report 99-4182
The Seattle, Washington, area is known for its livability and its magnificent natural setting. The city and nearby communities are surrounded by an abundance of rivers and lakes and by the bays of Puget Sound. Two majestic mountain ranges, the Olympics and the Cascades, rim the region. These splendid natural...
User's guide to PHREEQC (Version 2): A computer program for speciation, batch-reaction, one-dimensional transport, and inverse geochemical calculations
David L. Parkhurst, C.A.J. Appelo
1999, Water-Resources Investigations Report 99-4259
PHREEQC version 2 is a computer program written in the C programming language that is designed to perform a wide variety of low-temperature aqueous geochemical calculations. PHREEQC is based on an ion-association aqueous model and has capabilities for (1) speciation and saturation-index calculations; (2) batch-reaction and one-dimensional (1D) transport calculations...
Ground-water system, estimation of aquifer hydraulic properties, and effects of pumping on ground-water flow in Triassic sedimentary rocks in and near Lansdale, Pennsylvania
Lisa A. Senior, Daniel J. Goode
1999, Water-Resources Investigations Report 99-4228
Ground water in Triassic-age sedimentary fractured-rock aquifers in the area of Lansdale, Pa., is used as drinking water and for industrial supply. In 1979, ground water in the Lansdale area was found to be contaminated with trichloroethylene, tetrachloroethylene, and other man-made organic compounds, and in 1989, the area was placed...
Summary of hydrogeologic and ground-water-quality data and hydrogeologic framework at selected well sites, Adams County, Pennsylvania
Dennis J. Low, Diana L. Dugas
1999, Water-Resources Investigations Report 99-4108
Rapid population growth in Adams County has increased the demand for ground water and led Adams County planning officials to undertake an effort to evaluate the capabilities of existing community water systems to meet future, projected growth and to begin wellhead-protection programs for public-supply wells. As part of this effort,...
Effects of historical land-cover changes on flooding and sedimentation, North Fish Creek, Wisconsin
Faith A. Fitzpatrick, James C. Knox, Heather E. Whitman
1999, Water-Resources Investigations Report 99-4083
North Fish Creek, a Wisconsin tributary to Lake Superior, is an important recreational fishery that is potentially limited by the loss of aquatic habitat caused by accelerated flooding and sedimentation. A study of the historical flooding and sedimentation characteristics of North Fish Creek was done to determine how North Fish...
Simulation of ground-water flow and pumpage in Kings and Queens Counties, Long Island, New York
Paul E. Misut, Jack Monti Jr.
1999, Water-Resources Investigations Report 98-4071
The potential effects of using ground water as a supplemental source of supply in Kings and Queens Counties were evaluated through a 4-layer finite-difference ground-water-flow model with a uniform grid spacing of 1,333 feet. Hydraulic properties and boundary conditions of an existing regional ground-water-flow model of Long Island with a...
Hydrogeology, water use, and simulation of flow in the High Plains aquifer in northwestern Oklahoma, southeastern Colorado, southwestern Kansas, northeastern New Mexico, and northwestern Texas
Richard L. Luckey, Mark F. Becker
1999, Water-Resources Investigations Report 99-4104
The U.S. Geological Survey, in cooperation with the Oklahoma Water Resources Board, began a three-year study of the High Plains aquifer in northwestern Oklahoma in 1996. The primary purpose of this study was to develop a ground-water flow model to provide the Water Board with the information it needs to...
Ground-water resources in Kaloko-Honokohau National Historical Park, Island of Hawaii, and numerical simulation of the effects of ground-water withdrawals
Delwyn S. Oki, Gordon W. Tribble, William R. Souza, Edward L. Bolke
1999, Water-Resources Investigations Report 99-4070
Within the Kaloko-Honokohau National Historical Park, which was established in 1978, the ground-water flow system is composed of brackish water overlying saltwater. Ground-water levels measured in the Park range from about 1 to 2 feet above mean sea level, and fluctuate daily by about 0.5 to 1.5 feet in response...
Characterization and simulation of the quantity and quality of water in the Highland Lakes, Texas, 1983-92
Timothy H. Raines, Walter Rast
1999, Water-Resources Investigations Report 99-4087
The Highland Lakes, located in central Texas, are a series of seven reservoirs on the Colorado River (Lake Buchanan, Inks Lake, Lake Lyndon B. Johnson, Lake Marble Falls, Lake Travis, Lake Austin, and Town Lake). The reservoirs provide hydroelectric power for the area. In addition, Lake Austin and Town Lake...
Channel-pattern adjustments and geomorphic characteristics of Elkhead Creek, Colorado, 1937-97
John G. Elliott, Stevan Gyetvai
1999, Water-Resources Investigations Report 99-4098
Onsite channel surveys and sediment measurements made in 1997, aerial photographs taken from 1937 through 1993, and streamflowgaging- station record from 1954 to 1996 were used to determine the probable cause of accelerated streambed and streambank erosion in the lower reaches of Elkhead Creek, a perennial, meandering tributary of the...
Hydrogeology and water quality of the upper Floridan aquifer, western Albany area, Georgia
Lisa M. Stewart, Debbie Warner, Barbara J. Dawson
1999, Water-Resources Investigations Report 99-4140
Geologic, hydrologic, and water-quality data were collected to refine the hydrogeologic framework conceptual model of the Upper Floridan aquifer, and to qualitatively evaluate the potential of human activities to impact water quality in the Upper Floridan aquifer in the western Albany area, Georgia. Ground-water age dating was conducted by using...
Hydrogeology of the upper Floridan Aquifer in the vicinity of the Marine Corps Logistics Base near Albany, Georgia
Kristen Bukowski McSwain
1999, Water-Resources Investigations Report 98-4202
In 1995, the U.S. Navy requested that the U.S. Geological Survey conduct an investigation to describe the hydrogeology of the Upper Floridan aquifer in the vicinity of the Marine Corps Logistics Base, southeast and adjacent to Albany, Georgia. The study area encompasses about 90 square miles in the Dougherty Plain...
Hydrology, geomorphology, and flood profiles of the Mendenhall River, Juneau, Alaska
Edward G. Neal, Randy H. Host
1999, Water-Resources Investigations Report 99-4150
Water-surface-profile elevations for the 2-, 20-, 25-, 50-, and 100-year floods were computed for the Mendenhall River near Juneau, Alaska, using the U.S. Army Corps of Engineers Hydrologic Engineering Center River Analysis System model. The peak discharges for the selected recurrence intervals were determined using the standard log-Pearson type III...
Use of computer programs STLK1 and STWT1 for analysis of stream-aquifer hydraulic interaction
Leslie A. DeSimone, Paul M. Barlow
1999, Water-Resources Investigations Report 98-4212
Quantifying the hydraulic interaction of aquifers and streams is important in the analysis of stream base fow, flood-wave effects, and contaminant transport between surface- and ground-water systems. This report describes the use of two computer programs, STLK1 and STWT1, to analyze the hydraulic interaction of streams with confined, leaky, and...
A dynamic water-quality modeling framework for the Neuse River estuary, North Carolina
Jerad D. Bales, Jeanne C. Robbins
1999, Water-Resources Investigations Report 99-4017
As a result of fish kills in the Neuse River estuary in 1995, nutrient reduction strategies were developed for point and nonpoint sources in the basin. However, because of the interannual variability in the natural system and the resulting complex hydrologic-nutrient inter- actions, it is difficult to detect through a...
Simulation of stage and hydrologic budget for Shell Lake, Washburn County, Wisconsin
J. T. Krohelski, Daniel T. Feinstein, Bernard N. Lenz
1999, Water-Resources Investigations Report 99-4209
A model that simulates lake stage was developed to test the current understanding of the hydrology of Shell Lake, Wisconsin and to provide a tool for predicting the effects of withdrawing lake water on future lake stages. The model code is written in Fortran and simulates daily lake stage by...
Water-quality assessment of the Cook Inlet Basin, Alaska — Environmental setting
Timothy P. Brabets, Gordon L. Nelson, Joseph M. Dorava, Alexander M. Milner
1999, Water-Resources Investigations Report 99-4025
The Cook Inlet Basin in Alaska is one of 59 study units selected for study for water-quality assessment as part of the U.S. Geological Survey's National Water-Quality Assessment program. The Cook Inlet Basin study unit encompasses the fresh surface and ground waters in the 39,325 square-mile area that drains to...
A precipitation-runoff model for part of the Ninemile Creek watershed near Camillus, Onondaga County, New York
Phillip J. Zarriello
1999, Water-Resources Investigations Report 98-4201
A precipitation-runoff model, HSPF (Hydrologic Simulation Program Fortran), of a 41.7 square mile part of the Ninemile Creek watershed near Camillus, in central New York, was developed and calibrated to predict the hydrological effects of future suburban development on streamflow, and the effects of stormwater detention on flooding of Ninemile...
Environmental setting of the Yellowstone River basin, Montana, North Dakota, and Wyoming
Ronald B. Zelt, G.K. Boughton, K. A. Miller, J. P. Mason, L.M. Gianakos
1999, Water-Resources Investigations Report 98-4269
Natural and anthropogenic factors influence water-quality conditions in the Yellowstone River Basin. Physiography parallels the structural geologic setting that is generally composed of several uplifts and structural basins. Contrasts in climate and vegetation reflect topographic controls and the midcontinental location of the study unit. Surface-water hydrology reflects water surpluses in...
Environmental setting of the Willamette basin, Oregon
Mark A. Uhrich, Dennis A. Wentz
1999, Water-Resources Investigations Report 97-4082-A
The Willamette Basin, Oregon, is one of more than 50 large river basins and aquifer systems (referred to as study units) across the United States where the status and trends of water quality and the factors controlling water quality are being studied by the National Water-Quality Assessment Program of the...
Field trip guide to selected studies of the Southwest Mineral and Environmental Investigations Project in southeastern Arizona
B. B. Houser, M. E. Gettings, M.W. Bultman, Floyd Gray, K.R. Caruthers, D.M. Hirschberg
1999, Open-File Report 99-544
The Southwest Mineral and Environmental Investigations Project is designed to address issues raised by rapid urban development in the basins of the southwestern U.S. These issues require objective geoscientific data that can be used by land managers and stakeholders to develop informed land and water use strategies. The project integrates...