Publications

Nitrogen in the Chesapeake Bay Watershed - A Century of Change, 1950–2050

National Award for Superior Communication Product

Domestic Well Water Quality in Marcellus Shale Region

Factors Affecting Groundwater Quality Used for Domestic Supply in Marcellus Shale Region of North-Central and North-East Pennsylvania

Geohydrologic and water-quality characterization of a fractured-bedrock test hole in an area of Marcellus Shale gas development, Sullivan County, Pennsylvania

Report at Pennsylvania Geological Survey

Publications are the cornerstone of the Pennsylvania Water Science Center’s dissemination of scientific data and conclusions.

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January 1, 1996

A three-dimensional method-of-characteristics solute-transport model (MOC3D) A three-dimensional method-of-characteristics solute-transport model (MOC3D)

This report presents a model, MOC3D, that simulates three-dimensional solute transport in flowing ground water. The model computes changes in concentration of a single dissolved chemical constituent over time that are caused by advective transport, hydrodynamic dispersion (including both mechanical dispersion and diffusion), mixing (or dilution) from fluid sources, and mathematically...

Authors

Leonard F. Konikow, D.J. Goode, G.Z. Hornberger

Water Resources Mission Area, Ecosystems Mission Area, Toxic Substances Hydrology, Environmental Health Program, Pennsylvania Water Science Center

January 1, 1996

Maps of difference between ground-water contributions to base flow for the various recurrence intervals and ground-water withdrawals in the Neshaminy Creek basin, Pennsylvania Maps of difference between ground-water contributions to base flow for the various recurrence intervals and ground-water withdrawals in the Neshaminy Creek basin, Pennsylvania

No abstract available.

Authors

C.L. Schreffler, P.H. Bird

Water Resources Mission Area, Pennsylvania Water Science Center

January 1, 1996

Nutrient and triazine-herbicide concentrations in streams of the Chickies Creek Basin, south-central Pennsylvania, during low-flow conditions Nutrient and triazine-herbicide concentrations in streams of the Chickies Creek Basin, south-central Pennsylvania, during low-flow conditions

Excessive nutrients and herbicides in surface and ground water can affect human health and the aquatic life in Chickies Creek. Potential sources of these contaminants are all around us—direct application of nutrients and herbicides on land, discharge from wastewater-treatment and septic systems, and even deposition from the atmosphere. However, by far the largest source in the Chickies...

Authors

Michael J. Langland, Lloyd A. Reed

Water Resources Mission Area, Pennsylvania Water Science Center

January 1, 1996

Borehole geophysical logging for water-resources investigations in Pennsylvania Borehole geophysical logging for water-resources investigations in Pennsylvania

Borehole geophysical logging is a procedure to collect and transmit specific information about the geologic formations penetrated by a well by raising and lowering a set of probes or sondes that contain water-tight instruments in the well. The data collected can be used to determine general formation geology, fracture distribution, vertical borehole flow, and water-yielding capabilities.

Authors

Randall W. Conger

Water Resources Mission Area, Pennsylvania Water Science Center

January 1, 1996

Hydrogeology and ground-water quality of Valley Forge National Historical Park, Montgomery County, Pennsylvania Hydrogeology and ground-water quality of Valley Forge National Historical Park, Montgomery County, Pennsylvania

Valley Forge National Historical Park is just southwest of the Commodore Semiconductor Group (CSG) National Priorities List (Superfund) Site, a source of volatile organic compounds (VOC's) in ground water. The 7.5-square-mile study area includes the part of the park in Lower Providence and West Norriton Townships in Montgomery County, Pa., and surrounding vicinity. The park is underlain...

Authors

Ronald A. Sloto, B. Craig McManus

Water Resources Mission Area, Pennsylvania Water Science Center

January 1, 1996

Altitude and configuration of the potentiometric surface in the crystalline and metasedimentary rocks in Birmingham, Newlin, Pennsbury, and Pocopson Townships and parts of East Marlborough and Kennett Townships, Chester County, Pennsylvania, June 1994 thr Altitude and configuration of the potentiometric surface in the crystalline and metasedimentary rocks in Birmingham, Newlin, Pennsbury, and Pocopson Townships and parts of East Marlborough and Kennett Townships, Chester County, Pennsylvania, June 1994 thr

A map showing ground-water levels in crystalline and metasedimentary rocks in Birmingham, Newlin, Pennsbury, and Pocopson Townships and parts of East Marlborough and Kennett Townships, Chester County, Pennsylvania, was constructed from water levels measured in wells from June 1994 through November 1995. Pre-1994 measurements were incorporated on the map to provide control in areas where...

Authors

Charles R. Wood, William C. Wettstein, Stephen S. Aichele, James Joyce, Frank M. Schneider

Water Resources Mission Area, Pennsylvania Water Science Center

January 1, 1996

Altitude and configuration of the potentiometric surface in the crystalline and metasedimentary rocks in Sadsbury, West Caln, and West Sadsbury townships, Chester County, Pennsylvania, April 1993 through August 1994 Altitude and configuration of the potentiometric surface in the crystalline and metasedimentary rocks in Sadsbury, West Caln, and West Sadsbury townships, Chester County, Pennsylvania, April 1993 through August 1994

A map showing ground-water levels in crystalline and metasedimentary rocks in Sadsbury, West Caln, and West Sadsbury Townships, Chester County, Pennsylvania, was constructed from water levels measured in wells from April 1993 through August 1994. Pre-1993 measurements were incorporated on the map to provide control in areas where more recent data were not available. Because little ground...

Authors

William C. Wettstein, Charles R. Wood

Water Resources Mission Area, Pennsylvania Water Science Center

January 1, 1996

Assessment of severity and distribution of corrosive ground water in Pennsylvania Assessment of severity and distribution of corrosive ground water in Pennsylvania

Relations between corrosive ground water, water chemistry, and geology in Pennsylvania were evaluated by use of a modified version of the Langelier Saturation Index (LSIsn) and a geologic contact dataset in a Geographic Information System. Water-chemistry information for water samples collected from 4,839 combined private and public-supply wells from 1900 to 1993 was used to calculate...

Authors

M. J. Langland, D.L. Dugas

Water Resources Mission Area, Pennsylvania Water Science Center

January 1, 1996

HYSEP: A Computer Program for Streamflow Hydrograph Separation and Analysis HYSEP: A Computer Program for Streamflow Hydrograph Separation and Analysis

HYSEP is a computer program that can be used to separate a streamflow hydrograph into base-flow and surface-runoff components. The base-flow component has traditionally been associated with ground-water discharge and the surface-runoff component with precipitation that enters the stream as overland runoff. HYSEP includes three methods of hydrograph separation that are referred to in the...

Authors

Ronald A. Sloto, Michele Y. Crouse

Water Resources Mission Area, Pennsylvania Water Science Center

December 1, 1995

Radium and radon in ground water in the Chickies Quartzite, southeastern Pennsylvania Radium and radon in ground water in the Chickies Quartzite, southeastern Pennsylvania

The Chickies Quartzite, a Lower Cambrian-age formation compromised of quartzite and slate overlying a basal conglomerate, forms a narrow ridges and crops out discontinuously over 112 square miles in the Piedmont physiographic province of southeastern Pennsylvania. The formation is a low-yielding, fractured- rock, water-table aquifer recharged primarily by local precipitation. It is the...

Authors

L.A. Senior, K.L. Vogel

Water Resources Mission Area, Pennsylvania Water Science Center

November 1, 1995

A strategy for delineating the area of ground-water contribution to wells completed in fractured bedrock aquifers in Pennsylvania A strategy for delineating the area of ground-water contribution to wells completed in fractured bedrock aquifers in Pennsylvania

Delineating a contributing area to a well completed in a fractured bedrock aquifer in Pennsylvania is difficult because the hydrogeologic characteristics of fractured rocks are extremely complex. Because of this complexity, a single method or technique to delineate a contributing area will not be applicable for all wells completed in fractured-bedrock aquifers. Therefore, a strategy for...

Authors

D. W. Risser, G. J. Barton

Water Resources Mission Area, Pennsylvania Water Science Center

November 1, 1995

Land use, organochlorine compound concentrations, and trends in benthic-invertebrate communities in selected stream basins in Chester County, Pennsylvania Land use, organochlorine compound concentrations, and trends in benthic-invertebrate communities in selected stream basins in Chester County, Pennsylvania

Land use was analyzed for the drainage areas of 26 stream sites in Chester County, Pa., that cover a total area of 227 square miles or about 30 percent of the country. The most significant land-use changes during 1967-87 were decreased agricultural land use, increased residential land use, and increased commercial and industrial land use. Bulk samples of stream-bottom materials were

Authors

Mark A. Hardy, Kim L. Wetzel, Craig R. Moore

Water Resources Mission Area, Pennsylvania Water Science Center