Environmental Assessment of Lake Maggiore, St. Petersburg, Floridaby Thomas R. Sear, CH2M HILL, Orlando, United States,
Jim Bays, CH2M HILL, Orlando, United States,
Abstract: Lake Maggiore is a shallow 385 acre (156 ha) hypereutrophic lake located in St. Petersburg, Florida. The lake's watershed contains a variety of urban land use types that have discharged untreated stormwater runoff directly to the lake for many years. Lake water quality had declined due to the accumulated effect of stormwater discharges, and other factors such as past dredging and filling activities. An environmental assessment project was completed that included quality and quantity monitoring of stormwater discharges within the watershed; an inventory of hydrologic characteristics; and an assessment of long term hydrologic and pollutant loadings to the lake (CH2M HILL, 1991). A calibrated SWMM model was used to evaluate long term land surface runoff volumes to the lake. Flow averaged pollutant concentrations were used to estimate pollutant loads. The water quality sampling and modeling analysis allowed investigators to evaluate and summarize the origin of non-point source pollutants in the watershed; and to recommend management activities that would contribute to their control.
Subject Headings: Lakes | Water quality | Hydrologic models | Pollutants | Environmental issues | Water pollution | Water discharge | Nonpoint pollution | Watersheds | North America | Florida | United States
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