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Development of Threshold Runoff Simulation Method for Runoff Analysis of Jeju Island

제주도 유출분석을 위한 한계유출 모의기법 개발

  • Chung, Il-Moon (Department of Water Resources Research, Korea Institute of Construction Technology) ;
  • Lee, Jeong-Woo (Department of Water Resources Research, Korea Institute of Construction Technology) ;
  • Kim, Ji-Tae (Department of Water Resources Research, Korea Institute of Construction Technology) ;
  • Na, Han-Na (Department of Water Resources Research, Korea Institute of Construction Technology) ;
  • Kim, Nam-Won (Department of Water Resources Research, Korea Institute of Construction Technology)
  • 정일문 (한국건설기술연구원 수자원연구실) ;
  • 이정우 (한국건설기술연구원 수자원연구실) ;
  • 김지태 (한국건설기술연구원 수자원연구실) ;
  • 나한나 (한국건설기술연구원 수자원연구실) ;
  • 김남원 (한국건설기술연구원 수자원연구실)
  • Received : 2011.09.22
  • Accepted : 2011.10.21
  • Published : 2011.10.31

Abstract

In Jeju island, runoff has frequently happened when the rainfall depth is over a threshold value. To simulated this characteristic rainfall-runoff model structure has to be modified. In this study, the TRSM (Threshold Runoff Simulation Method) was developed to overcome the limitations of SWAT in applying to the hydrologic characteristics of Jeju island. When the precipitation and soil water are less than threshold value, we revised the SWAT routine not to make surface/lateral or groundwater discharge. For Hancheon watershed, the threshold value was set as 80% of soil water through the analysis of rainfall-runoff relationship. Through the simulation of test watershed, it was proven that TRSM performed much better in simulating pulse type stream flow for the Hancheon watershed.

Keywords

SWAT-K;Hancheon watershed;TRSM (Threshold Runoff Simulation Method)

Acknowledgement

Grant : 제주형 물순환 해석 및 수자원 관리기반 구축

Supported by : 한국건설교통평가원

References

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Cited by

  1. Assessing Unit Hydrograph Parameters and Peak Runoff Responses from Storm Rainfall Events: A Case Study in Hancheon Basin of Jeju Island vol.24, pp.4, 2015, https://doi.org/10.5322/JESI.2015.24.4.437
  2. Altitudinal Pattern of Evapotranspiration and Water Need for Upland Crops in Jeju Island vol.48, pp.11, 2015, https://doi.org/10.3741/JKWRA.2015.48.11.915