USGS Science⌕ Search

Geology topics

Research about upper Patapsco aquifer

Source-linked reports with geographic coverage including upper Patapsco aquifer.

5 recordsLinked to original sources
USGS2005

The difference between the potentiometric surfaces of the upper Patapsco aquifer, September 1990 and September 2003 in southern Maryland

This report presents a map showing the change in the potentiometric surface of the Upper Patapsco aquifer in the Upper Patapsco Formation of Cretaceous age in Southern Maryland for September 1990 and September 2003. The map, based on water level measurements in 32 wells, shows that during the 13-year period, the potentiometric surface changed from an increase of 6 feet at Arnold, which is located just north of Annapolis, to a decline of 25 feet at Waldorf and Lexington Park and 20 feet at LaPlata and the Chalk Point powerplant.

Maryland↗
USGS2003

The difference between the potentiometric surfaces of the upper Patapsco aquifer, September 1990 and September 1999 in southern Maryland

This report presents a map showing the change in the potentiometric surface of the Upper Patapsco aquifer in the Upper Patapsco Formation of Cretaceous age in Southern Maryland for September 1990 and September 1999. The map, based on water-level measurements in 37 wells, shows that the potentiometric surface during the 9- year period ranged from a decline of 1 foot in the northernmost part of the study area, which is near the outcrop of the aquifer, to a decline of 22 feet at LaPlata, which is near the southwesternmost part of the study area.

Maryland↗
USGS1999

Potentiometric surface of the upper Patapsco aquifer in southern Maryland, September 1997

This report presents a map showing the potentiometric surface of the Upper Patapsco aquifer in the Patapsco Formation of Cretaceous age in Southern Maryland during September 1997. The map was prepared from water-level measurements in 42 wells. The potentiometric surface was 122 feet above sea level near the northern boundary and outcrop area of the aquifer in a topographically high area of Anne Arundel County, and 57 feet above sea level in a similar setting in Prince Georges County. From these high areas, the potentiometric surface declined to the southeast toward large well fields in the Annapolis area and Arnold and from all directions toward a cone of depression southwest of Waldorf. Ground-water levels reached 20 feet below sea level in the Annapolis area, 28 feet below sea level at Arnold, and 118 feet below sea level southwest of Waldorf.

Maryland↗
USGS1999

The difference between the potentiometric surfaces of the upper Patapsco aquifer, September 1990 and September 1997 in southern Maryland

This report presents a map that shows the change in the potentiometric surface of the Upper Patapsco aquifer in the Upper Patapsco Formation of Cretaceous age in Southern Maryland for September 1990 and September 1997. The map, based on water-level measurements in 38 wells, shows that the change of the potentiometric surface during the 7-year period ranged from zero in the most northern part of the study area, which is near the outcrop of the aquifer, to a decline of 19 feet at LaPlata, which is near the most southwestern part of the study area.

Maryland↗