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Reconnaissance of the ground-water, surface-water system in the Zekiah Swamp Run basin, Charles and Prince Georges Counties, Maryland
H. T. Hopkins, G. T. Fisher, L. J. McGreevy
1986, Water-Resources Investigations Report 86-4097
The water table in the alluvium of the Zekiah Swamp Run valley in southern Maryland is above stream level during most of the year and the alluvial aquifer contributes water to the stream. During the summer, however, high evapotranspiration sometimes lowers the water table below the stream level. Water then...
Hydrogeology and simulation of water flow in strata above the Bearpaw Shale and equivalents of eastern Montana and northeastern Wyoming
W. R. Hotchkiss, J. F. Levings
1986, Water-Resources Investigations Report 85-4281
The Powder River, Bull Mountains, and Williston basins of Montana and Wyoming were investigated to understand the geohydrology and subsurface water flow. Rocks were separated into: Fox Hills-lower Hell Creek aquifer (layer 1), upper Hell Creek confining layer (layer 2), Tullock aquifer (layer 3), Lebo confining layer (layer 4), and...
Rock riprap design for protection of stream channels near highway structures; Volume 1, Hydraulic characteristics of open channels
J. C. Blodgett
1986, Water-Resources Investigations Report 86-4127
Volume I discusses the hydraulic and channel properties of streams, based on data from several hundred sites. Streamflow and geomorphic data have been collected and developed to indicate the range in hydraulic factors typical of open channels , to assist design, maintenance, and construction engineers in preparing rock riprap bank...
Measurement of scour-depth near bridge piers
J. V. Skinner
1986, Water-Resources Investigations Report 85-4106
River-bed scour is a major source of damage to bridge piers and bridge abutments. When scour depth exceeds design limits, the supporting material around the footings is washed away and the structure becomes unstable. Equations for predicting scour-depth show a significant lack of agreement so portable equipment for measuring scour...
Relationship of nonpoint-source discharges, streamflow, and water quality in the Galena River basin, Wisconsin
S. J. Field
1986, Water-Resources Investigations Report 85-4214
Four small tributaries of the Galena River Madden Branch tributary, Pats Creek, Apple River, and Madden Branch that drain nonpoint agricultural sources and that receive no significant point-source discharges were monitored from October 1980 through September 1982 to determine water quality. Streamflow in the tributaries during the 1981 water year was...
Preliminary evaluation of the Knox Group in Tennessee for receiving injected wastes
M. W. Bradley
1986, Water-Resources Investigations Report 85-4304
The EPA is authorized under the Safe Drinking Water Act to protect underground sources of drinking water from contamination. However, an aquifer may be exempted from protection and used for injected wastes where the aquifer meets criteria established in the EPA 's Underground Injection Control program. The Knox Group in...
Preliminary evaluation of the Highland Rim aquifer system in Tennessee for receiving injected wastes
M. W. Bradley
1986, Water-Resources Investigations Report 85-4252
The EPA has authority under the Safe Drinking Water Act to protect underground sources of drinking water from contamination by deep well injection. An aquifer, however, may be exempted from protection and used for injected wastes where the aquifer meets criteria established in the Agency 's Underground Injection Control program....
Current water resources activities in Alabama, fiscal year 1986
L. J. Slack, E.A. Meadows
1986, Open-File Report 86-131
The purpose of this report is to describe the current (as of 1986) water resources activities of the U.S. Geological Survey in Alabama. The responsibilities and objectives of the Survey; organization of the Alabama District; sources of funding; current projects; hydrologic data program; and a selected bibliography of hydrologic reports...