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This study derived the analysis results of alternatives for integrated watershed management under urbanization and climate change scenarios. Climate change and urbanization scenarios were obtained by using SDSM (Statistical Downscaling Method) model and ICM (Impervious Cover Model), respectively. Alternatives for the Anyangcheon watershed are reuse of wastewater treatment plant effluent, and redevelopment of existing reservoir. Flow and BOD concentration duration curves were derived by using HSPF (Hydrological Simulation Program Fortran) model. As a result, low flow (Q99, Q95, Q90) and BOD concentration (C30, C10, C1) were very sensitive to the alternatives comparing to high flow(Q10, Q5, Q1). Although urbanization makes the hydrological cycle distorted, effective alternatives can reduce its damage. The numbers of days to satisfy the instreamflow requirements and target water quality were also sensitive to urbanization. This result showed that the climate change and urbanization should be considered in the water resources/watershed and environmental planning. keywords : Alternative, Anyangcheon, Climate change, HSPF, Urbanization

Effectiveness Analysis of Alternatives for Water Resources Management Considering Climate Change and Urbanization