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http://dx.doi.org/10.3741/JKWRA.2003.36.4.609

Analysis of Hydrological Impact for Long-Term Land Cover Change Using the WMS HEC-1 Model in the Upstream Watershed of Pyeongtaek Gauging Station of Anseong-cheon  

Kim, Seong-Joon (건국대학교 지역건설환경공학과)
Park, Geun-Ae (건국대학교 지역건설환경공학과)
Jung, In-Kyun (건국대학교 지역건설환경공학과)
Kwon, Hyung-Joong (건국대학교 지역건설환경공학과)
Publication Information
Journal of Korea Water Resources Association / v.36, no.4, 2003 , pp. 609-621 More about this Journal
Abstract
The purpose of this study is to evaluate the hydrological impact due to temporal land cover change by gradual urbanization of upstream watershed of Pyeongtaek gauging station of Anseong -cheon. WMS HEC-1 was adopted, and DEM with 200$\times$200m resolution and hydrologic soil group from 1:50,000 soil map were prepared. Land covers of 1986, 1990, 1994 and 1999 Landsat TM images were classified by maximum likelihood method. The watershed showed a trend that forest ＆ paddy areas decreased and urban/residential area gradually increased for the period of 14 years. The model was calibrated at 2 locations (Pyeongtaek and Gongdo) by comparing observed with simulated discharge results for 5 summer storm events from 1998 to 2001. The watershed average CN values varied from 61.7 to 62.3 for the 4 selected years. To identify the impact of streamflow by temporal area change of a target land use, a simple evaluation method that the CN values of areas except the target land use are unified as one representative CN value was suggested. By applying the method, watershed average CN value was affected in the order of paddy, forest and urban/residential, respectively.
Keywords
land cover change; WMS HEC-1; CN;
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Times Cited By KSCI : 4  (Citation Analysis)
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