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MD-DE-DC Water Science Center

U.S. GEOLOGICAL SURVEY

Open-File Report 99-84


The Difference Between the Potentiometric Surfaces of the Magothy Aquifer, September 1975 and September 1997 in Southern Maryland

By Curtin, S.E., Andreasen, D.C., and Mack, F.K.

 

Abstract

This report presents a map that shows the change in the potentiometric surface of the Magothy aquifer in the Magothy Formation of Cretaceous age in Southern Maryland for September 1975 and September 1997. The map, based on water-level measurements in 65 wells, shows that the change of the potentiometric surface during the 22-year period ranged from zero at the outcrop area, which is in the most northern part of the study area, to a decline of 87 feet in Waldorf. Waldorf is near the most southwestern part of the study area and approaches the downdip boundary of the aquifer.

 


This report is available as a GIF file (Large Print Size) and in Portable Document Format (PDF)(8½ x 11 printed size).

 

View the report in GIF (183 KB)

View the report in PDF (126 KB)

 

This report is available online in Portable Document Format (PDF). If you do not have the Adobe Acrobat PDF Reader, it is available for free download from Adobe Systems Incorporated.

 

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For more information about USGS activities in Maryland, Delaware and the District of Columbia contact:

 

Director
MD-DE-DC Water Science Center
U.S. Geological Survey
8987 Yellow Brick Road
Baltimore, MD 21237


Telephone: (410) 238-4200
Fax: (410) 238-4210

 

or access the USGS Water Resources of Maryland, Delaware, and District of Columbia home page at:  http://md.water.usgs.gov/.



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