James M. Gerhart, Water Science Center Director

Education and Experience

M.S.

The Pennsylvania State University (Hydrogeology), 1977

B.S.

Franklin and Marshall College (Geology), 1973

Experience

-- Center Director, USGS, Maryland-Delaware-District of Columbia Water Science Center, Baltimore, MD, 2005-present

-- District Chief, USGS, Maryland-Delaware-District of Columbia District, Baltimore, Maryland, 1996-2005.

-- Project Chief, USGS, Potomac River Basin study unit, National Water-Quality Assessment (NAWQA) Program, Towson, Maryland, 1991-1996.

-- Studies Section Chief, USGS, Modeling and Resource Assessment Section, Maryland-Delaware-D.C. District, Towson, Maryland, 1984-1990.

-- Publications Section Chief, USGS, Maryland-D.C. Office, Mid-Atlantic District, Towson, Maryland, 1988-1989.

-- Assistant Office Chief, USGS, Maryland-D.C. Office, Mid-Atlantic District, Towson, Maryland, 1987-1990.

-- Project Chief, USGS, Harrisburg Subdistrict, Pennsylvania District, Harrisburg, Pennsylvania, 1980-1984. Led projects involving ground-water resource evaluation, ground-water flow modeling, and agricultural nonpoint-source contamination.

-- District Ground-Water Modeling Specialist, USGS, Pennsylvania District, Harrisburg, Pennsylvania, 1980-1984.

-- Project Assistant, USGS, Southwest Florida Subdistrict, Florida District, Tampa, Florida, 1977-1979. Assisted on projects involving ground-water flow modeling, wellfield evaluation, and waste-water injection.

-- Graduate Assistant, Department of Geosciences, The Pennsylvania State University, State College, Pennsylvania, 1973-1977. Completed M.S. Thesis addressing ground-water yield potential of a fractured sandstone aquifer using ground-water flow modeling techniques. Taught laboratories in Physical Geology, Historical Geology, and Hydrogeology

Selected Publications

Bolton, D.W., Gerhart, J.M., and Kasraei, S., 2009, Sustainability of water resources in the fractured-rock area of Maryland: U.S. Geological Survey Fact Sheet 2009-3009, 2 p.

Shedlock, R.J., Bolton, D.W., Cleaves, E.T., Gerhart, J.M., and Nardi, M.R., 2007, A science plan for a comprehensive regional assessment of the Atlantic Coastal Plain aquifer system in Maryland: U.S. Geological Survey Open-File Report 2007-1205, 25p.

Gerhart, J.M. and Cleaves, E.T., 2005, The status of streamflow and ground-water-level monitoring networks in Maryland, 2005: U.S. Geological Survey Fact Sheet FS 2005-3030, 6p.

Gerhart, J.M. and Brakebill, J.W., 1996, Design and implementation of a sampling strategy for a water-quality assessment of the Potomac River Basin: U.S. Geological Survey Water-Resources Investigations Report 96-4034, 31 p.

Gerhart, J.M. and Blomquist, J.D., 1995, Selected trace-element and organic contaminants in streambed sediments of the Potomac River Basin, August 1992: U.S. Geological Survey Water-Resources Investigations Report 95-4267, 12 p.

Otton, E.G., Willey, R.E., McGregor, R.A., Achmad, G.J., Hiortdahl, S.N., and Gerhart, J.M., 1988, Water Resources and estimated effects of ground-water development, Cecil County, Maryland: Maryland Geological Survey Bulletin 34, 133 p.

Gerhart, J.M. and Lazorchick, G.J., 1988, Evaluation of the ground-water resources of the lower Susquehanna River basin, Pennsylvania and Maryland: U.S. Geological Survey Water-Supply Paper 2284, 128 p.

Gerhart, J.M., 1986, Ground-water recharge and its effects on nitrate concentrations beneath a manured field site in Pennsylvania: Ground Water, v. 24, no. 4, p. 483-489.

Gerhart, J.M. and Lazorchick, G.J., 1985, Evaluation of the ground-water resources of parts of Lancaster and Berks Counties, Pennsylvania: U.S. Geological Survey Water-Resources Investigations Report 84-4327, 136 p.

Wilson, W.E. and Gerhart, J.M., 1981, Simulated effects of ground-water development on the potentiometric surface of the Floridan aquifer, west-central Florida: U.S. Geological Survey Professional Paper 1217, 83 p.

Ryder, P.D., Johnson, D.M., and Gerhart, J.M., 1980, Model evaluation of the hydrogeology of the Morris Bridge well field and vicinity in west-central Florida: U.S. Geological Survey Water-Resources Investigations Report 80-29, 92 p.

Wilson, W.E. and Gerhart, J.M., 1979, Simulated changes in potentiometric levels resulting from ground-water development for phosphate mines, west-central Florida: Journal of Hydrology, Maxey Memorial Volume, p. 491-515.

Gerhart, J.M. and Parizek, R.R., 1977, Digital simulation of the yield potential of the Elliot Park-Burgoon aquifer in eastern Clearfield and western Centre Counties, Pennsylvania: The Pennsylvania State University, Coal Research Section, Special Research Report SR-113, 1.