A Microcomputer Model for Design of Agricultural Stormwater Management Systems in Florida's Flatwoods

ABSTRACT Amicrocomputer model was developed for use in design and analysis of stormwater management systems for agriculture in Florida's flatwoods. A version of CREAMS, CREAMS-WT, which simulates the hydrology of flat, high-water-table watersheds was combined with a modified SCS unit hydrograph and linked to a reservoir-channel routing program. A retention/detention area component was incorporated in to the model to simulate the reduction of nutrients in the runoff water. The model analyzes peak runoff rates and runoff volumes from design storms and routes these storms through a system of channels to a retention/detention area. The model was used with historical weather data to evaluate the water quality considerations from the developed area. Results indicate that the model adequately predicts peak runoff rates and runoff hydrographs from a multi-day runoff event from an existing watershed. The model also adequately predicts the reduction of nutrients when runoff is routed through a retention/detention area.