Reconciliation of Hydraulic Models to Coastal Flatland Watersheds.
Runoff hydrographs from coastal flatwood watersheds in Southwest Florida have been found to exhibit prolonged recession limbs. Commonly-used hydrologic models with default parameters appear to have difficulty. Simulating these runoff hydrograph shapes. While adjustments to timing parameters seem to be effective in reducing and/or shifting the time of the peak runoff rate, they may not accurately account for the elongated shape of the runoff hydrograph. Stream flow and rainfall data collected by the U S Geological Survey and the Palmer Ranch Developer were used in an attempt to reconcile the SCS Unit Hydrograph model and Runoff Block of EPA’s Stormwater Management Model (SWMM).
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