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Page 4634, results 115826 - 115850

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Low-flow routing in the Lehigh and Delaware Rivers, Pennsylvania
H.N. Flippo Jr.
1988, Water-Resources Investigations Report 85-4331
Flow-routing studies were made to evaluate the response of the Lehigh and Delaware Rivers to low-flow augmentative releases from two reservoirs --Francis E. Walter Reservoir and Beltzville Lake--in the Lehigh River basin. Digital routing models that use diffusion-analogy methods to convolute flows with system-response functions were developed to simulate daily...
A strategy for collecting ground-water data and developing a ground-water model of the Missouri River alluvial aquifer, Woodbury and Monona Counties, Iowa
Robert C. Buchmiller
1988, Open-File Report 87-452
A ground-water-flow model and plan for obtaining supporting data are proposed for a part of the Missouri River alluvial aquifer in Woodbury and Monona Counties, Iowa. The proposed model and the use of the principle of superposition will aid in the interpretation of the relation between ground water and surface...
Techniques for estimating the magnitude and frequency of floods in Minnesota
J.E. Jacques, D. L. Lorenz
1988, Water-Resources Investigations Report 87-4170
Log-Pearson type III flood-frequency analyses were made of annual series peak-flow records from 246 gaging stations on unregulated streams in Minnesota having watersheds ranging in area from 0.08 to 2,520 square miles. These flood discharges were related to watershed and climatic characteristics by using multiple-regression techniques. On the basis of...
Low-flow profiles of the Tennessee River tributaries in Georgia
R.F. Carter, E. H. Hopkins, H.A. Perlman
1988, Water-Resources Investigations Report 88-4049
Low flow information is provided for use in an evaluation of the capacity of streams to permit withdrawals or to accept waste loads without exceeding the limits of State water quality standards. The purpose of this report is to present the results of a compilation of available low flow data...
Simulation of ground-water flow in the lower sand unit of the Potomac-Raritan-Magothy aquifer system, Philadelphia, Pennsylvania
R. A. Sloto
1988, Water-Resources Investigations Report 86-4055
Ground-water flow in the lower sand unit of the Potomac-Raritan-Magothy aquifer system in Philadelphia was simulated with a two-dimensional finite- difference ground-water model. The modeled 133-square-mile area also included parts of Delaware County, Pennsylvania, and Camden and Gloucester Counties, New Jersey. The lower sand unit is Cretaceous in age and...
Hydrogeology and predevelopment flow in the Texas Gulf Coast aquifer systems
Paul D. Ryder
1988, Water-Resources Investigations Report 87-4248
A multilayered ground-water flow system exists in the Coastal Plain sediments of Texas. The Tertiary and Quaternary clastic deposits have an area! extent of 128,000 square miles onshore and in the Gulf of Mexico. Two distinct aquifer systems are recognized for the sediments, which range in thickness from a few...
Geohydrology and susceptibility of major aquifers to surface contamination in Alabama; area 12
J. C. Scott, R.H. Cobb
1988, Water-Resources Investigations Report 88-4078
This report delineates and describes the geohydrology and susceptibility of major aquifers to contamination in Coffee, Dale, Henry, Houston, and Geneva Counties, Alabama. The major aquifers are the Upper Floridan, Lisbon, Nanafalia-Clayton, and Providence-Ripley aquifers. Estimated groundwater withdrawals for public water supplies are about 42 million gal/day. Maximum withdrawals for...
A modular three-dimensional finite-difference ground-water flow model
Michael G. McDonald, Arlen W. Harbaugh
1988, Techniques of Water-Resources Investigations 06-A1
This report presents a finite-difference model and its associated modular computer program. The model simulates flow in three dimensions. The report includes detailed explanations of physical and mathematical concepts on which the model is based and an explanation of how those concepts are incorporated in the modular structure of the...
Water use in New Mexico, 1985
Lynn A. Garrabrant
1988, Open-File Report 88-343
Water-use data are essential for managing the State's limited water resources. The New Mexico State Engineer Office (NMSEO) and the U.S. Geological Survey collect and publish data on water use at 5-year intervals. These data are used by Federal and State agencies, city and county planners, private industry, and irrigation...