Due to a lapse in appropriations, the majority of USGS websites may not be up to date and may not reflect current conditions. Websites displaying real-time data, such as Earthquake and Water and information needed for public health and safety will be updated with limited support. Additionally, USGS will not be able to respond to inquiries until appropriations are enacted.  For more information, please see www.doi.gov/shutdown

Jonathan Dillow



MS: Civil Engineering, Drexel University, 1995.

BS: Civil Engineering, Drexel University, 1989.

Research / Professional Focus / Current Projects

In my role as Data Chief, and supervisor of the Data Section of the MD-DE-DC Water Science Center, my interests encompass all aspects of USGS water-data collection, interpretation, and publication activities in Maryland, Delaware, and the District of Columbia.

I support and maintain appropriate staff to achieve the Center's data-collection commitments, and facilitate the effective and efficient performance of data-collection work tasks that are focused and aligned with the USGS mission as well as local and regional partners' water-resource data and analysis needs.

Selected Bibliography

Magnitude and Frequency of Floods on Nontidal Streams in Delaware: U.S. Geological Survey Scientific Investigations Report 2006-5146, by Ries, K.G. III and Dillow, J.J.A., 2006, 59 p.

Adjustments to U.S. Geological Survey Peak-Flow Magnitude-Frequency Relations in Delaware and Maryland Following Hurricane Floyd, September, 1999: U.S. Geological Survey Fact Sheet FS-152-02, by Doheny, E.J. and Dillow, J.J.A., 2002, 8 p.

Groundwater quality and discharge to Chincoteague and Sinepuxent Bays adjacent to Assateague Island National Seashore, Maryland: U.S. Geological Survey Water-Resources Investigations Report 02-4029, by Dillow, J.J.A., Banks, W.S.L., and Smigaj, M.J., 2002, 42 p.

Optimization of Groundwater Withdrawal at the Old O-Field Area, Aberdeen Proving Ground, Maryland: U.S. Geological Survey Water-Resources Investigations Report 00-4283 by Banks, W.S.L. and J.J.A. Dillow, 2001, 18 p.

Groundwater Discharge and Nitrate Loadings to the Coastal Bays of Maryland: U.S. Geological Survey Water-Resources Investigations Report 99-4167 by Dillow, J.J.A. and E.A. Greene, 1999, 8 p.

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