Water for future (물과 미래)

Korea Water Resources Association (한국수자원학회)
권호 표지

Runoff Analysis on the Physically-Based Conceptual Time-Continuous Runoff Model

물리적.개념적 연속 유출모형에 의한 유출해석

  • Published : 1995.12.01
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Abstract

The subjective research attempts to apply a rainfall-runoff model capable of considering time-variation of soil water contents which are highly correlated to the river flows on the qpqyungchang river basin and to evaluate its performance for flow forecasting. The model used in this study is a physically-based conceptual time-continuous model, which is composed of the Sacramento soil moisture accounting model and the nonlinear multiple conceptual reservoirs model. The daily precipitation and evaporation data for 7 years and for 3 years were used for the parameter estimation and the model verification, respectively. As a result, the flows including a significant flood event were well simulated, and the cross-correlation coefficient between observed flows and computed flows for the verification periods was 0.87, but in general computed flows were underestimated for the low-flow periods. Also, the effects of precipitation and soil water content to the river flows were analysed for the flood and the drought.

본 연구의 목적은 하천유량에 결정적 영향을 미치는 토양수분 상태의 시간적 변화를 고려할 수 있는 강우-유출 모형을 평창강 유역에 적용하여 홍수예측 모형으로서의 가능성을 검증하는데 있다. 사용된 모형은 Sacramento 토양수분 모형과 비선형 다중저수지 형태의 유역홍수 추적 모형으로 구성된 물리적 개념에 근거를 둔 연속을 모형이다. 모형의 매개변수 추정 및 모형 검증을 위해서 각각 7년, 3년간의 일 강수량 및 증발산 자료를 이용하였다. 모형의 적용 결과, 저유량일 때에는 계산유량이 관측유량보다 다소 적게 계산되었지만, 홍수시를 포함하여 전반적으로 만족할 만한 유출계산(상관계수 0.87)을 할 수 있었다. 또한, 홍수와 가뭄과 같은 극한사상이 발생하였을 때의 강수와 토양습윤 상태가 유출에 미치는 영향을 해석하였다.

Keywords

References

  1. 연구보고서, 건기연 91-WR-111 평창강유역의 수문특성조사 윤석영;김승;김규호
  2. 연구보고서, 건기연 92-WR-111-2 수문모형 평가에 관한 연구:강우-유출모형을 중심으로 이홍래;김형섭
  3. Rep. NWS HYDRO-37 Derivation of initial soil moisture accounting parameters from soil properties for the National Weather Service River Forecast System Armstrong,B.L.
  4. Technical Rep., NWS, NOAA and State of Calif. Dept. of Water Resour. A generalized streamflow simulation system:Conceptual modeling for digital computers Burnash,R.J.C.;Ferral,R.L.;Mcguire,R.A.
  5. WRR v.22 no.13 A generalized stochastic hydrometeorological model for flood and flash-flood forecasting:1. Formulation Georgakakos,K.P.
  6. J. of Geophysical Research v.92 no.D8 Real-time flash flood prediction Georgakakos,K.P.
  7. WRR v.31 no.3 Hycroclimatology of continental watersheds:1. Temporal analyses Georgakakos,K.P.;Bae,D.H.;Cayan,D.R.
  8. Rep. No. 286, Ralph M. Parsons Lab. Dept. of Civil Eng. A precipitation model and its use in real-time river flow forecasting Georgakakos,K.P.;Bras,R.L.
  9. WRR v.16 no.6 Real-time forecasting with a conceptual hydrologic model: 1. Analysis of uncertainty Kitanidis,P.K.;Bras,R.L.
  10. NWS HYDRO-31 Catchment modeling and initial parameter estimation for the National Weather Service River Forecast System Peck,E.L.