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Analyis of stormwater and runoff characteristics in Anseongcun basin using HEC-HMS

HEC-HMS을 이용한 안성천 유역의 강우 유출 특성 분석

  • Hwang, Byung-Gi (Department of Civil Engineering, Sangmyung University) ;
  • Yang, Seung-Bin (Department of Environmental Resources, Sangmyung University)
  • 황병기 (상명대학교 건설시스템공학과) ;
  • 양승빈 (상명대학교 환경자원학과)
  • Received : 2017.12.19
  • Accepted : 2018.04.06
  • Published : 2018.04.30

Abstract

The HEC-HMS model was applied to identify the rainfall-runoff processes for the Anseongchun basin, where the lower part of the stream has been damaged severely by tropical storms in the past. Modeling processes include incorporating with the SCS-CN model for loss, Clark's UH model for transformation, exponential recession model for baseflow, and Muskingum model for channel routing. The parameters were calibrated through an optimization technique using a trial and error method. Sensitivity analysis after calibration was performed to understand the effects of parameters, such as the time of concentration, storage coefficient, and base flow related constants. Two storm water events were simulated by the model and compared with the corresponding observations. Good accuracy in predicting the runoff volume, peak flow, and the time to peak flow was achieved using the selected methods. The results of this study can be used as a useful tool for decision makers to determine a master plan for regional flood control management.

Keywords

Clark's UH;HEC-HMS;Muskingum;Optimization technique;SCS-CN

Acknowledgement

Supported by : 상명대학교

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