This report contains information relating to two factors: (1) The effects of domestic pollution abatement on a eutrophic lake, and (2) investigations into methods of reclaiming such lakes, especially through the use of particulate materials which retard pollutant release from sediments. The study lake, Stone Lake, has been monitored for approximately ten years from the time of pollution abatement. Certain types of fly ash, a particulate waste product of coal combustion, was shown, in laboratory studies, to possess properties capable of precipitating orthophosphate from overlying waters and subsequently 'sealing' the phosphorus within the sediments for long periods of time. A lake such as Stone Lake could thus be made permanently or semi-permanently, phosphorus limited, thereby altering the successional pattern previously indicated and significantly reducing the overall standing algal crop.

Prepared by University of Notre Dame, Ind., under grant no. R-801245. Includes appendix. Includes bibliographical references (pages 62-65).