Water-resources activities of the U.S. Geological Survey in Texas– Fiscal year 1987
1988, Open-File Report 88-100
The U.S. Geological Survey (USGS) was established by an act of Congress on March 3, 1879, to provide a permanent Federal agency to conduct the systematic and scientific classification of the public lands and to examine the geological structure, mineral resources, and products of national domain. An integral part of...
Precambrian ophiolites of Arabia; a summary of geologic settings, U-Pb geochronology, lead isotope characteristics, and implications for microplate accretion, Kingdom of Saudi Arabia
John S. Pallister, J. S. Stacey, L. B. Fischer, W. R. Premo
1988, Open-File Report 88-606
Disrupted ophiolites occur in linear belts as much as 900 km long between micro plates that collided during the late Proterozoic to form the Arabian Shield. The U-Pb zircon ages and lead-isotope data from these ophiolitic rocks help constrain the history of accretion of the Arabian Shield and thereby contribute...
The effects of two multipurpose reservoirs on the water temperature of the McKenzie River, Oregon
R. P. Hansen
1988, Water-Resources Investigations Report 87-4175
A one dimensional, unsteady-state temperature model using the equilibrium temperature approach (with air temperature used to estimate equilibrium temperature) is used to evaluate the effects of two Army Corps of Engineers dams and resulting reservoirs on the McKenzie River, from Delta Park (River Kilometer 99.9) to Leaburg Dam (River Kilometer...
The Pintail coal bed and barrier bar G: A model for coal of barrier bar-lagoon origin, Upper Cretaceous Almond Formation, Rock Springs coal field, Wyoming
H. W. Roehler
1988, Professional Paper 1398
No abstract available....
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...
Hydrogeology and preliminary assessment of regional flow in the upper Cretaceous and adjacent aquifers in the northern Mississippi embayment
J. V. Brahana, T. O. Mesko
1988, Water-Resources Investigations Report 87-4000
On a regional scale, the groundwater system of the northern Mississippi embayment is composed of a series of nonindurated clastic sediments that overlie a thick sequence of Paleozoic carbonate, sandstones, and shales. The units that comprise the geohydrologic framework of this study are the alluvium-lower Wilcox Aquifer the Midway confining...
Hydrology and ecology of the Apalachicola River, Florida : a summary of the river quality assessment
John F. Elder, Sherron D. Flagg, Harold C. Mattraw Jr.
1988, Water Supply Paper 2196-D
During 1979-81, the U.S. Geological Survey conducted a large-scale study of the Apalachicola River in northwest Florida, the largest and one of the most economically important rivers in the State. Termed the Apalachicola River Quality Assessment, the study emphasized interrelations among hydrodynamics, the flood-plain forest, and the nutrient-detritus flow through...
Geologic and hydrologic investigations of a potential nuclear waste disposal site at Yucca Mountain, southern Nevada
Michael D. Carr, James C. Yount, editor(s)
1988, Bulletin 1790
Crustal velocity sections based on two seismic-refraction profiles are presented for the area west of Yucca Mountain, Nye County, Nevada. The Crater Flat profile is interpreted in terms of six velocity layers ranging from 1.5 to 6.1 km/s. Interpretation of the Beatty profile reveals an escarpment near the northeast edge...
Simulation of saltwater movement in the Floridan aquifer system, Hilton Head Island, South Carolina
Peter W. Bush
1988, Water Supply Paper 2331
Freshwater to supply Hilton Head Island, S.C., is obtained from the upper permeable zone of the Upper Floridan aquifer. Long-term pumping at Savannah, Ga., and the steadily increasing pumping on Hilton Head Island, have lowered Upper Floridan heads near the center of the island from about 10 feet above sea...
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...
Regionalization of peak discharges for streams in Kentucky
Anne F. Choquette
1988, Water-Resources Investigations Report 87-4209
Multiple regression analysis was used to delineate hydrologically distinct regions in Kentucky, and to develop regression models for estimating peak discharge for unregulated streams in these regions. The regression models provide estimates of flood quantiles with associated average recurrence intervals of 2, 5, 10, 25, 50, and 100 years. The...
Simulation of flow in the Edwards Aquifer, San Antonio region, Texas, and refinement of storage and flow concepts
Robert W. Maclay, Larry F. Land
1988, Water Supply Paper 2336-A
The Edwards aquifer is a complexly faulted, carbonate aquifer lying within the Balcones fault zone of south-central Texas. The aquifer consists of thin- to massive-bedded limestone and dolomite, most of which is in the form of mudstones and wackestones. Well-developed secondary porosity has formed in association with former erosional surfaces...
Evaluation of the ground-water resources of the lower Susquehanna River basin, Pennsylvania and Maryland
James M. Gerhart, George J. Lazorchick
1988, Water Supply Paper 2284
Ground water in the 3,458-square-mile lower Susquehanna River basin occupies secondary openings in bedrock. The distribution of openings is a function of lithology, depth, and topography. Local flow systems account for most of the total ground-water flow. Average annual recharge for the lower basin is 1,857 million gallons per day,...
The role of sediments in the chemistry of aquatic systems - Proceedings of the sediment chemistry workshop, February 8-12, 1982
Wesley L. Bradford, Arthur J. Horowitz, editor(s)
1988, Circular 969
A workshop on sediment chemistry was held at the U.S. Geological Survey National Headquarters in Reston, Virginia, February 8-12, 1982, to discuss the state of the science and possible future directions for research and operational programs in the Water Resources Division of the U.S. Geological Survey. Technical papers presented broad...
Simulation of five ground-water withdrawal projections for the Black Mesa area, Navajo and Hopi Indian Reservations, Arizona
J. G. Brown, J.H. Eychaner
1988, Water-Resources Investigations Report 88-4000
The N Aquifer is the main source of water in the 5,400 sq mi Black Mesa area in the Navajo and Hopi Indian Reservations in northeastern Arizona. Water in the aquifer is under confined conditions in the central 3,300 sq mi of the area. Maximum saturated thickness is about 1,050...
Volatilization of benzene and eight alkyl-substituted benzene compounds from water
R. E. Rathbun, D. Y. Tai
1988, Water Supply Paper 2342
Predicting the fate of organic compounds in streams and rivers often requires knowledge of the volatilization characteristics of the compounds. The reference-substance concept, involving laboratory-determined ratios of the liquid-film coefficients for volatilization of the organic compounds to the liquid-film coefficient for oxygen absorption, is used to predict liquid-film coefficients for...
DLG2ISM, a Fortran program to read DLG-3 optional format digital data files into the VAX/VMS version of the interactive surface modeling software package; B, Source code DLG2ISM.FOR
Gregory N. Green
1988, Open-File Report 88-258-B
Freshwater supply potential of the Atlantic Intracoastal Waterway near Myrtle Beach, South Carolina
W. J. Carswell, C.L. Sanders Jr., D.M. Johnson
1988, Water-Resources Investigations Report 88-4066
A study was conducted to determine the low-flow frequency of freshwater flow in the Atlantic Intracoastal Waterway (AICW) near Myrtle Beach, South Carolina and to determine the effects of proposed freshwater withdrawals of 45 cu ft/sec at the location of the saltwater-freshwater interface. Discharges simulated in the AICW for 1982-86...
Ground-water resources and simulation of flow in aquifers containing freshwater and seawater, Island County, Washington
D. B. Sapik, Gilbert C. Bortleson, B. W. Drost, M. A. Jones, E. A. Prych
1988, Water-Resources Investigations Report 87-4182
Aquifers in Island County, Washington, that are intruded by seawater from Puget Sound contain chloride concentrations that exceed 100 mg/L. Chloride concentrations exceeded 100 mg/L in 24 % of the wells that were drilled below sea level and sampled in August 1981, but most of the chloride concentrations did not...
Simulated changes in ground-water flow caused by hypothetical pumping in southeastern Carson City, Nevada
D. K. Maurer
1988, Open-File Report 87-769
An existing groundwater model was used to simulate changes in groundwater flow caused by hypothetical pumping in an area near the south-eastern part of Carson City, Nevada. A total of five hypothetical pumping patterns were used in the model simulations. The simulations assumed two pumping rates: total annual average pumpage...
Hydrogeology and water-supply potential of the water-table aquifer on Dauphin Island, Alabama
R. E. Kidd
1988, Water-Resources Investigations Report 87-4283
The water table aquifer on Dauphin Island, Alabama, consists of a thin veneer of Holocene sand and an underlying Pleistocene unit locally known as the Gulfport Formation. The aquifer is from 28 to 35 ft thick with a thick marine clay at its base. Water in the aquifer generally is...
Documentation of a steady-state saltwater-intrusion model for three-dimensional ground-water flow, and user's guide
D. B. Sapik
1988, Open-File Report 87-526
A finite-difference model that simulates three-dimensional flow of groundwater was modified to simulate steady flow of freshwater in a multiple-aquifer system containing freshwater and static saltwater. The two fluids are assumed to be immiscible, with constant but different densities, and are separated by a sharp interface. The interface position computed...
Water resources of Borrego Valley and vicinity, San Diego County, California: Phase 2 - Development of a ground-water flow model
H. T. Mitten, G. C. Lines, Charles Berenbrock, T. J. Durbin
1988, Water-Resources Investigations Report 87-4199
Because of the imbalance between recharge and pumpage, groundwater levels declined as much as 100 ft in some areas of Borrego Valley, California during drinking 1945-80. As an aid to analyzing the effects of pumping on the groundwater system, a three-dimensional finite-element groundwater flow model was developed. The model was...
Hydrology of the lower Little Red River, Arkansas, and a procedure for estimating available streamflow
G.D. Grosz, J. E. Terry, A.P. Hall
1988, Water-Resources Investigations Report 88-4008
The U.S. Geological Survey, in cooperation with the Arkansas Soil and Water Conservation Commission, conducted a hydrologic investigation of the lower Little Red River from near Searcy, Arkansas (mi 31.7), to the river 's mouth at its confluence with the White River. During 1983 and 1984, data were collected on...
Review of mechanisms, methods, and theory for determining recharge to shallow aquifers in North Dakota
W.F. Horak
1988, Water-Resources Investigations Report 88-4122
Effective management of ground-water resources requires knowledge of all components of the water budget for the aquifer of interest. Efforts to simulate ground-water flow prior to development and the effects of proposed pumping in several of North Dakota's shallow glacial aquifers have been hindered by the lack of reliable estimates...
