Pond-Aquifer Interaction at South Pond of Lake Cochituate, Natick, Massachusetts.

摘要

A U.S. Army facility on a peninsula in South Pond of Lake Cochituate was designated a Superfund site by the U.S. Environmental Protection Agency in 1994 because contaminated ground water was detected at the facility, which is near the Natick Springvale public-supply well-field. The interaction between South Pond and the underlying aquifer controls ground-water flow patterns near the pond and determines the source of water withdrawn from the wellfield. A map of the bathymetry and the thickness of fine-grained pond-bottom sediments was prepared on the basis of fathometer, groundpenetrating radar, and continuous seismic-reflection surveys. The geophysical data indicate that the bottom sediments are fine grained toward the middle of the pond but are coarse grained in shoreline areas.