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APPLICATION OF THE HSPF MODEL TO THE SOUTH FORK OF THE BROAD RIVER WATERSHED IN NORTHEASTERN GEORGIA
Citation:
MOHAMOUD, Y. M. AND L. M. PRIETO. APPLICATION OF THE HSPF MODEL TO THE SOUTH FORK OF THE BROAD RIVER WATERSHED IN NORTHEASTERN GEORGIA. Presented at Georgia Water Resources Conference, Athens, GA, March 27 - 29, 2007.
Impact/Purpose:
The main objective of this research is to identify deficiencies in the current watershed modeling approaches and conduct research that makes the Hydrologic Simulation Program-Fortran (HSPF) more accurate, more efficient, and more applicable to the needs of the resource managers and decision makers. The ultimate goal is to have watershed models that can simulate the cumulative impacts of alternative development scenarios and present the risks associated with different scenarios under an adaptive management framework where scenarios impacts are tested, model results analyzed, lessons learned, and management decisions made through an iterative process.
Description:
The Hydrological Simulation Program-Fortran (HSPF) is a comprehensive watershed model which simulates hydrology and water quality at user-specified temporal and spatial scales. Well-established model calibration and validation procedures are followed when adjusting model parameter values. In general, parameter values that result in good agreement between simulated and observed streamflow and water quality are retained. Final parameter selection often depends on the accuracy of the model input data, particularly the temporal and spatial resolution of precipitation data. This study evaluates how calibrated model parameter values respond to changes in temporal and spatial resolution of precipitation data over a watershed. Based on sensitivity of specific parameters to the resolution of spatial and temporal scale of precipitation data, this study demonstrates how HSPF parameter values shift to compensate for errors in precipitation resolution. In addition, it establishes typical HSPF model parameter values for Piedmont watersheds in Northeastern Georgia.