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Potentiometric Surface of the Magothy Aquifer in Southern Maryland, September 1995

Open-File Report 96-621

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Abstract

A map showing the potentiometric surface of the Magothy aquifer in the Magothy Formation of Cretaceous age in southern Maryland during September 1995 was prepared from water-level measurements in 92 wells. The potentiometric surface was highest near the northwestern boundaryand outcrop area of the aquifer in topographically high areas of Anne Arundel and Prince Georges Counties. Regionally, the potentiometric surface sloped gently downward towards the southeast and the local gradients were directed toward the centers of three cones of depression that have developed in response to pumping. These cones were centeredaround well fields in the Annapolis, Waldorf, and Chalk Point areas. Ground-water levels were as low as 63 feet below sea level in the Waldorf area, more than 50 feet below sea level at Chalk Point, and almost 20 feet below sea level near Annapolis.

Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Potentiometric Surface of the Magothy Aquifer in Southern Maryland, September 1995
Series title:
Open-File Report
Series number:
96-621
Edition:
-
Year Published:
1996
Language:
ENGLISH
Description:
1 map : photocopy ; 20 x 17 cm., on sheet 28 x 22 cm.