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Earl Greene (Former Employee)

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Field Techniques for Estimating Water Fluxes Between Surface Water and Ground Water

This report focuses on measuring the flow of water across the interface between surface water and ground water, rather than the hydrogeological or geochemical processes that occur at or near this interface. The methods, however, that use hydrogeological and geochemical evidence to quantify water fluxes are described herein. This material is presented as a guide for those who have to examine the in
Authors
Donald O. Rosenberry, James W. LaBaugh
By
Water Resources Mission Area

Spatial analysis of land use and shallow groundwater vulnerability in the watershed adjacent to Assateague Island National Seashore, Maryland and Virginia, USA

Spatial relations between land use and groundwater quality in the watershed adjacent to Assateague Island National Seashore, Maryland and Virginia, USA were analyzed by the use of two spatial models. One model used a logit analysis and the other was based on geostatistics. The models were developed and compared on the basis of existing concentrations of nitrate as nitrogen in samples from 529 dome
Authors
A.E. LaMotte, E.A. Greene

Ground-water vulnerability to nitrate contamination in the mid-atlantic region

The U.S. Environmental Protection Agency?s (USEPA) Regional Vulnerability Assessment (ReVA) Program has developed a set of statistical tools to support regional-scale, integrated ecological risk-assessment studies. One of these tools, developed by the U.S. Geological Survey (USGS), is used with available water-quality data obtained from USGS National Water-Quality Assessment (NAWQA) and other stud
Authors
Earl A. Greene, Andrew E. LaMotte, Kerri-Ann Cullinan, Elizabeth R. Smith

Ground-water vulnerability to nitrate contamination at multiple thresholds in the mid-Atlantic region using spatial probability models

The U.S. Geological Survey, in cooperation with the U.S. Environmental Protection Agency?s Regional Vulnerability Assessment Program, has developed a set of statistical tools to support regional-scale, ground-water quality and vulnerability assessments. The Regional Vulnerability Assessment Program?s goals are to develop and demonstrate approaches to comprehensive, regional-scale assessments that
Authors
Earl A. Greene, Andrew E. LaMotte, Kerri-Ann Cullinan
By
Water Resources Mission Area, Chesapeake Bay Activities, Maryland-Delaware-D.C. Water Science Center

Hydrogeologic controls on ground-water discharge to the Washington METRO subway tunnel near the Medical Center station and Crossover, Montgomery County, Maryland

Excessive water intrusion has been observed inside several of the Washington Metropolitan Area Transit Authority subway tunnels, with the worst leakage occurring along the Red Line tunnels and stations north of Dupont Circle in Washington, D.C. These tunnels were constructed in bedrock that contains permeable (water-bearing) joints and fractures. Excessive water leakage through the walls and water
Authors
Earl A. Greene, Allen M. Shapiro, Andrew E. LaMotte

State Water Resources Research Institute Program

No abstract available.
Authors
John E. Schefter

Hydrogeologic characterization of the Minnelusa and Madison aquifers near Spearfish, South Dakota

No abstract available.
Authors
E.A. Greene, A.M. Shapiro, Janet M. Carter

Ground-water discharge and nitrate loadings to the coastal bays of Maryland

Nitrate in ground water discharged to the Atlantic coastal bays of Maryland enhances the growth of phytoplankton and algae in the bays, which in turn contributes to the process of eutrophication (changes in a body of water as nutrients and sediments accumulate), which is one of the principal environmental problems in the bays. Information on nitrate loading to the bays has been identified as a maj
Authors
Jonathan J.A. Dillow, Earl A. Greene

Estimating formation properties from early-time recovery in wells subject to turbulent head losses

A mathematical model is developed to interpret the early-time recovering water level following the termination of pumping in wells subject to turbulent head losses. The model assumes that turbulent head losses dissipate immediately when pumping ends. In wells subject to both borehole storage and turbulent head losses, the early-time recovery exhibits a slope equal to 1/2 on log-log plots of the re
Authors
A.M. Shapiro, D.S. Oki, E.A. Greene
By
Ecosystems Mission Area, Toxic Substances Hydrology, Environmental Health Program

Spatial and temporal study of nitrate concentration in groundwater by means of coregionalization

Spatial and temporal behavior of hydrochemical parameters in groundwater can be studied using tools provided by geostatistics. The cross-variogram can be used to measure the spatial increments between observations at two given times as a function of distance (spatial structure). Taking into account the existence of such a spatial structure, two different data sets (sampled at two different times),
Authors
V. D'Agostino, E.A. Greene, G. Passarella, M. Vurro

AIRSLUG: A fortran program for the computation of type curves to estimate transmissivity and storativity from prematurely terminated air-pressurized slug tests

The Fortran code AIRSLUG can be used to generate the type curves needed to analyze the recovery data from prematurely terminated air-pressurized slug tests. These type curves, when used with a graphical software package, enable the engineer or scientist to analyze field tests to estimate transmissivity and storativity. Prematurely terminating the slug test can significantly reduce the overall time
Authors
E.A. Greene, A.M. Shapiro
By
Ecosystems Mission Area, Toxic Substances Hydrology, Environmental Health Program

Tracing Recharge from Sinking Streams over Spatial Dimensions of Kilometers in a Karst Aquifer

Stable isotopes of hydrogen and oxygen were used to trace the sources of recharge from sinking streams to wells and springs several kilometers downgradient in the karst Madison aquifer near Rapid City, South Dakota. Temporal sampling of streamflow above the swallets identified a distinct isotopic signature that was used to define the spatial dimensions of recharge to the aquifer. When more than on
Authors
E.A. Greene

Non-USGS Publications**

Greene, E.A. and Rahn, P.H., 1995, Localized anisotropic transmissivity in a karst aquifer: Ground Water, v. 33, no. 5, 806-816.

**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.

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Water Resources Research Act Program

Water Resources Research Act Program

The Water Resources Research Act (WRRA) Program is a Federal-State partnership that plans, facilitates, and conducts research that helps resolve State and regional water problems; promotes technology transfer; promotes dissemination and application of research; trains scientists through participation in research; and awards competitive grants under the Water Resources Research Act.
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Water Resources Mission Area
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Water Resources Research Act Program

The Water Resources Research Act (WRRA) Program is a Federal-State partnership that plans, facilitates, and conducts research that helps resolve State and regional water problems; promotes technology transfer; promotes dissemination and application of research; trains scientists through participation in research; and awards competitive grants under the Water Resources Research Act.
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USGS Celebrates 50th Anniversary of Water Resources Research Act

USGS Celebrates 50th Anniversary of Water Resources Research Act

The U.S. Geological Survey joins its many partners in other federal agencies, at universities, and in state and local governments in recognizing the...

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