Diagnostic/Feasibility Study for Urban Lakes

摘要

The report presents the results of a year-long, diagnostic/feasibility study of two urban lakes located in Manchester, New Hampshire: Crystal Lake and Dorrs Pond. The study determines the sources and magnitudes of pollutants entering the ponds and recommends methods to improve the ponds' water quality. The current quality of the ponds and their tributaries is described and alternatives to improve the quality are discussed. It is recommended that aluminum sulfate be applied to the bottom muds of Crystal Lake to reduce phosphorus release, thereby reducing algal growth. At Dorrs Pond, a combination of in-lake and watershed controls are proposed. These include draining and dredging the pond bottom and installing devices to reduce direct stormwater runoff by enhancing water infiltration into the ground.