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 Groundwater resource evaluation, Groundwater flow modeling, and agricultural nonpoint-source contamination.

-- District Groundwater 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 Groundwater 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 Groundwater yield potential of a fractured sandstone aquifer using Groundwater 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 Groundwater-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 Groundwater development, Cecil County, Maryland: Maryland Geological Survey Bulletin 34, 133 p.

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

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

Gerhart, J.M. and Lazorchick, G.J., 1985, Evaluation of the Groundwater 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 Groundwater 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 Groundwater 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.