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Application of HSPF Model for Effect Analyses of Watershed Management Plans on Receiving Water Qualities  

Song, Hye-Won (Department of Environmental Science and Engineering, Ewha Womans University)
Lee, Hye-Won (Department of Environmental Science and Engineering, Ewha Womans University)
Choi, Jung-Hyun (Department of Environmental Science and Engineering, Ewha Womans University)
Park, Seok-Soon (Department of Environmental Science and Engineering, Ewha Womans University)
Publication Information
Journal of Korean Society of Environmental Engineers / v.31, no.5, 2009 , pp. 358-363 More about this Journal
Abstract
The HSPF (Hydrological Simulation Program-Fortran) model was applied to the Kyoungan stream watershed to analyze effects of watershed management plans on receiving water qualities. Utilizing BASINS 3.1 GIS program, the Kyoungan stream watershed was divided into 57 sub-basins and model input parameters were obtained, from DEM (Digital Elevation Model), land use type, stream map, and wastewater treatment facilities, etc.. The hydrologic module of the model was validated based on the measured meteorological data and stream flow data. Then the model was calibrated and verified against the field measurements of water qualities, including temperature, DO, BOD, $NO_3-N$, $NH_3-N$, Org-N, TN and TP. In most cases, there were reasonable agreements between measurements and predictions. The validated model was used to analyze the water quality improvements in the main stream of Kyoungan stream according to the watershed management plans in sub-basins, which are three different scenarios: water quality improvement in tributaries through watershed management activities, expansion and up-grade of wastewater treatment plants, and application of first and second scenarios together. It was concluded that expansion and upgrade of wastewater treatment plants would be more effective than watershed management activities. In order to improve water qualities to the satisfactory level, both watershed management and point source control must be required in the Kyoungan stream.
Keywords
HSPF; BASINS; Kyoungan Stream; Sub-basin Management; Paldang Lake;
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Times Cited By KSCI : 1  (Citation Analysis)
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