Potentiometric Surface of the Lower Patapsco 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 Lower Patapsco aquifer in the Patapsco Formation of Cretaceous age in Southern Maryland during September 1997. The map was prepared from water-level measurements in 62 wells. The potentiometric surface was 88 feet above sea level near the northwestern boundary and outcrop area of the aquifer in a topographically high area of Anne Arundel County and 104 feet above sea level in a similar setting in Prince Georges County. From these high areas, the potentiometric surface declined towards large well fields at Crofton, Severndale, Arnold, and Annapolis. The ground-water levels reached 25 feet below sea level at Crofton, 56 feet below sea level at Severndale, 40 feet below sea level at Arnold, and 14 feet below sea level near Annapolis. The potentiometric surface also declined from LaPlata, Indian Head, and other surrounding areas toward a cone of depression at Waldorf. The ground-water levels were more than 100 feet below sea level at LaPlata, 110 feet below sea level at Indian Head, and 169 feet below sea level at Waldorf. A cone of depression is also present at the Morgantown power plant with a water level of 98 feet below sea level.
