U.S. Geological Survey ground-water studies in Delaware

Abstract

Ground water is an important natural resource in Delaware that supplies 67 percent of the population (about 400,000 people) with drinking water. In 1985, 79 million gallons of ground water were withdrawn daily in the State. Of that quantity, 37 percent was used for public supply, 26 percent was for agriculture, 20 percent was used by industry, 16 percent was for domestic and commercial use, and 1 percent was for thermoelectric-power generation. The major issues related to ground water in Delaware are: Contamination by agricultural chemicals and hazardous wastes, Effects of land use, and Declining water levels and intrusion of brackish water.

Construction and Proactive Management Led to Tree Removals on an Urban College Campus

“…Philadelphia's natural terrestrial ecosystems are largely mesophytic forests [45], with wetland areas along many creeks and rivers [46]. The campus and the city include the fall line between the Piedmont (generally hilly and forested) and Atlantic Coastal Plain (generally flat and swampy) physiographic regions [47].…”