Journal of Environmental Science International (한국환경과학회지)

The Korean Environmental Sciences Society (한국환경과학회)
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Impacts of Initial Soil Moisture on Hydrologic Outflow in a Distributed FLO-2D Model

분포형 FLO-2D 수문모형에서 초기토양함수가 유출결과에 미치는 영향

  • Lee, Khil-Ha (Department of Civil Engineering, Daegu University)
  • 이길하 (대구대학교 토목공학과)
  • Received : 2021.03.12
  • Accepted : 2021.04.24
  • Published : 2021.08.31
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Abstract

Soil water enters the atmosphere via evapotranspiration, where it transforms into atmospheric water vapor and plays important role in the surface-atmosphere energy exchange. Soil conditions have a direct influence on the effective rainfall, and initial soil moisture conditions are important for quantitatively evaluating the effective rainfall in a watershed. To examine the sensitivity of the initial saturation to hydrologic outflow, a two-dimensional distributed FLO-2D hydrologic model was applied to a small watershed. The initial saturation was set to 0.3, 0.5, and 0.7 and the obtained results were compared. The Green-ampt model was chosen to calculate the penetration loss. Depending on the initial soil moisture, the peak flow rate varied by up to 60%, and the total water volume in the watershed by approximately 40%.

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Acknowledgement

이 연구는 2020학년도 대구대학교 학술연구비지원으로 수행되었음.

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