The Eutrophic Potential of Wahiawa Reservoir Sediments.

摘要

Secondarily-treated sewage effluent discharges into the Wahiawa Reservoir have been implicated as the primary cause of the eutrophic conditions present in the reservoir. An assessment was made of the eutrophication potential of the sediment and its relative importance and impact on the selection of a management alternative was the objective of this study using laboratory sediment-water contact systems. Sediment was incubated with four different types of water simulating aerobic and anaerobic conditions in the hypolimnion of the Wahiawa Reservoir. Samples were withdrawn periodically and analyzed for nutrients,chemical oxygen demand (COD),and other constituents. After parameters reached a steady-state,the algal growth potential (AGP) of the waters was determined. A nutrient model of the reservoir shows that diversion of the Wahiawa sewage treatment plant effluent will result in a 65% reduction of N and a 46% reduction of P in the epilimnion of the reservoir.