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Page 5347, results 133651 - 133675

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Experimental study of artificial recharge alternatives in northwest Hillsborough County, Florida
William C. Sinclair
1977, Water-Resources Investigations Report 77-13
Extensive water withdrawal from the Floridan aquifer in the urban Tampa Bay area has induced leakage from the overlying surficial aquifer adversely effecting the water table and lake levels. Artificial recharge could reduce the impact of these effects. Four experiments were conducted to investigate possible recharge alternatives; sinkhole recharge, water-spreading,...
Time of travel of solutes in the Tuscarawas River Basin, Ohio, August and September, 1974
Arthur O. Westfall, Earl E. Webber
1977, Water-Resources Investigations Report 77-23
A time-of-travel study was made on a 106-mile reach of the Tuscarawas River to determine average velocity and dispersion characteristics between selected points. The reach was divided into five subreaches, and a fluorescent dye used as a tracer material. At about the 50-percent flow-duration level, time of travel of the...
Guide for data collection to calibrate a predictive digital ground-water model of the unconfined aquifer in and near the city of Modesto, California
R. W. Page
1977, Water-Resources Investigations Report 76-41
The city of Modesto encompasses about 12 square miles in the northeastern part of the San Joaquin Valley, Calif. The ground-water model encompasses about 542 square miles. In the Modesto area, ground water occurs in an unconfined aquifer a confined aquifer. both of which are composed of unconsolidated materials, and...
Geohydrology of the Englishtown Formation in the northern Coastal Plain of New Jersey
W. D. Nichols
1977, Water-Resources Investigations Report 76-123
The Englishtown Formation of the Matawan Group of Late Cretaceous age is exposed in the western part of the New Jeresy Coastal Plain along a northeast-southwest trending zone extending from Raritan Bay to Delaware Bay. In outcrop, in the northern part of the Coastal Plain, the Englishtown typically consists of...
Digital-model evaluation of the ground-water resources in Ocotillo-Coyote Wells Basin, Imperial County, California
James A. Skrivan
1977, Water-Resources Investigations Report 77-30
A flow model using finite-element techniques has been constructed for an alluvial aquifer in the Ocotillo-Coyote Wells Basin, Imperial County, Calif. Natural recharge is about 2,600 acre-feet per year, and estimated ground water in storage is 640 ,000 acre-feet. Pumpage totaled 880 acre-feet in 1975. The computed decline from steady-state...
Techniques for estimating flood discharges for Oklahoma streams; Techniques for calculating magnitude and frequency of floods in Oklahoma from rural and urban areas under 2500 square miles, with compilations of flood data through 1975
Wilbert O. Thomas Jr., Robert K. Corley
1977, Water-Resources Investigations Report 77-54
Statewide regression equations are defined for estimating peak discharges of floods having recurrence intervals ranging from 2 to 500 years. Contributing drainage area, main-channel slope and mean annual precipitation are the independent variables required for estimating flood discharges for rural streams. For urban streams the percentage of the basin that...
Initial assessment of the ground-water resources in the Monterey Bay region, California
K. S. Muir
1977, Water-Resources Investigations Report 77-46
The Association of Monterey Bay Area Governments (AMBAG) has been designated as the areawide waste-treatment-management planning agency for the Monterey Bay region under Sec. 208 of the Federal Water Pollution Control Act Amendments of 1972 (Public Law 92-500). Sec. 208 establishes the authority and responsibility of the designated local agency...
Ground water in the Fresno area, California
K. S. Muir
1977, Water-Resources Investigations Report 77-59
The Fresno area of California uses about 140,000 acre-feet of ground water a year for municipal and domestic purposes. An average of 2,000,000 acre-feet of water a year is pumped for irrigation. Major sources of recharge are deep penetration of irrigation water (80 percent) and seepage from canals, rivers, and...
Geohydrology of part of the Round Valley Indian Reservation, Mendocino County, California
K. S. Muir, Dwight Albert Webster
1977, Water-Resources Investigations Report 77-22
The Round Valley Indian Reservation in northern California obtains most of its water from the ground-water reservoir. The ground-water reservoir is made up of continental deposits, alluvium, and stream-channel deposits ranging in age from Pliocene to Holocene. Most of the water is pumped from the alluvium. Most ground water (about...
Ground-water resources along the Blue Ridge Parkway, North Carolina
M. D. Winner Jr.
1977, Water-Resources Investigations Report 77-65
The best areas to develop ground water along the Blue Ridge Parkway in North Carolina are in broad draws and in stream valleys where draws open to the valleys. Saprolite thickness in these places can exceed 50 feet and provide adequate ground-water storage; draws are topographic expressions of fracture zones...
Hydrology of the Creeping Swamp Watershed, North Carolina with reference to potential effects of stream channelization
M.D. Winner, C.E. Simmons
1977, Water-Resources Investigations Report 77-26
Hydrologic data were collected for four years at six sites in the Creeping Swamp watershed in eastern North Carolina in a preliminary effort to study the effects of stream channelization on the hydrology of a small watershed. A water-budget evaluation for pre-channelized conditions showed that runoff accounts for about 17...
Technique for estimating the magnitude and frequency of floods in Texas
E.E. Schroeder, B.C. Massey
1977, Water-Resources Investigations Report 77-110
Drainage area, slope, and mean annual precipitation were the only factors that were statistically significant at the 95-percent confidence level when the characteristics of the drainage basins were used as independent variables in a multiple-regression flood-frequency analysis of natural, unregulated streams in Texas. The State was divided into six regions...
Hydrologic reconnaissance of Tsala Apopka Lake, Citrus County, Florida
A. T. Rutledge
1977, Water-Resources Investigations Report 77-89
The swamps, marshes, and open waters of Tsala Apopka Lake, Florida, were mapped and the hydrologic connection between the lake and the Floridan limestone aquifer was studied from October 1975 to September 1976. Tsala Apopka Lake is a series of shallow , interconnected lakes, ponds, and marshes whose water surface...
Saltwater intrusion in the shallow aquifer in Martin and Palm Beach counties, Florida
W. B. Scott, L. F. Land, H.G. Rodis
1977, Water-Resources Investigations Report 76-135
Urban growth has been rapid in recent years in Palm Beach and Martin Counties, Fla. The withdrawal of large quantities of fresh ground water in the vicinity of the coast has reduced or locally reversed the natural seaward hydraulic gradient and, in places, allowed saltwater to advance landward in the...
Hydrologic considerations associated with dredging spring ponds in Wisconsin
William J. Rose
1977, Water-Resources Investigations Report 77-18
Spring ponds (small spring-fed bodies of water) are natural features of some glaciated areas and have a continuous flow of ground water entering through their bottoms and exiting through surface outlets. Dredging has been used to restore ponds that have been filled in part or totally by sediment. The purpose of...
Ground water in the Lajas Valley, Puerto Rico
Henry R. Anderson
1977, Water-Resources Investigations Report 76-68
Lajas Valley is plagued with salinity and waterlogging problems of the soils. Use of brackish (500 milligrams per liter) ground water for irrigation compounded the problem until an irrigation-drainage system was constructed in 1955. Lajas Valley is an alluvium-filled trough between volcanic and limestone highlands. The alluvium, mostly clay and...