Potentiometric Surface of the Aquia Aquifer in Southern Maryland, September 1997
By Curtin, S.E., Andreasen, D.C., and Mack, F.K.
Abstract
This report presents a map showing the potentiometric surface of the Aquia aquifer in the Aquia Formation of Paleocene age in Southern Maryland during September 1997. The map was prepared from water-level measurements in 81 wells. The potentiometric surface was above sea level near the northern boundary and outcrop area of the aquifer in topographically high areas of Anne Arundel and Prince Georges Counties, and was below sea level in the remainder of the study area. The hydraulic gradient was directed southeastward toward an extensive cone of depression around well fields at Lexington Park and Solomons Island. Ground-water levels were more than 80 feet below sea level in a 60-square mile area surrounding the deepest part of the cone of depression. The lowest measurement was 143 feet below sea level in one well near the center of the cone.
