Abstract

City Park Lake is a shallow, subtropical, urban hypereutrophic lake located in Baton Rouge, Louisiana. By the late 1970s, this artificial lake had experienced extreme eutrophication and suffered from frequent algal blooms and fish kills. Restoration of City Park Lake in 1983 consisted of dredging nutrient-laden sediments and rehabilitating sewage pipelines. Nearly one decade following restoration, filamentous algae became a recurring nuisance. A simplified phosphorus management model was developed to aid local officials in decision-making processes pertaining to the management of the lake and its watershed. The calibrated model was used to evaluate several management strategies for the reduction of in-lake phosphorus levels. The management of sediment phosphorus levels combined with reduced watershed phosphorus concentrations is viewed as the most viable option for the long-term health of the lake.

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