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Development of Distributed Rainfall -Runoff Model by Using GIS and Uncertainty Analysis (II) - Application and Analysis -

GIS와 불확실도 해석기법을 이용한 분포형 강우 -유출 모형의 개발 (II) - 적용 및 분석 -

  • 최현상 (한국건설기술연구원) ;
  • 한건연 (경북대학교 공과대학 토목공학과)
  • Published : 2004.04.01

Abstract

In this study(II), the model developed in the previous study(I) has been tested on two cases of constant-slope areas to verify the model applicability. Firstly, an impervious one-dimensional runoff problem has been simulated. Secondly, an impervious two-dimensional runoff problem at a converging plain which consists of a V-shaped section plus a portion of the surface of a cone has been simulated. For each case, the simulation results have good agreements with the observed data. And the model has been applied to actual watersheds, which were the Sulma watershed with 8$\textrm{km}^2$ and the Donggok watershed with 33.2$\textrm{km}^2$, drainage area, respectively. The simulated results agree with observed in terms of discharges at several stations. Monte Carlo simulation was also performed on the same watersheds and the modeling results have been evaluated. The suggested model can be used for real-time forecasting of rainfall-runoff analysis, and will contribute for basinwide flood control in the future.

본 연구(II)에서는 앞선 연구(I)에서 개발된 모형의 적용성을 증명하기 위해 2가지 등경사 가상유역에 대해 적용하였다. 먼저, 불투수조건의 1차원 흐름 추적에 대해 적용하고, 두 번째로 원추모양의 일부분처럼 되어있는 V자형 불투수 가상유역에 2차원 흐름추적을 적용하였다. 각자의 경우에서 모형의 결과와 관측치는 잘 일치하였다. 또한, 본 도형을 8$\textrm{km}^2$의 유역면적을 가지는 설마천 유역과 33.2$\textrm{km}^2$의 유역면적을 가지는 동곡 유역에 각각 적용하였고, 모의된 결과는 관측치와 잘 일치하는 것으로 나타났다. Monte Carlo 모의 역시 같은 유역에 적용하여 평가하였다. 본 모형은 향후 실시간 강우-유출해석 및 예보에 적극 사용될 수 있으며 유역단위 홍수조절에도 큰 기여를 할 수 있을 것으로 사료되었다.

Keywords

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