Journal of Korea Water Resources Association (한국수자원학회논문집)

Korea Water Resources Association (한국수자원학회)
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Development of Combination Runoff Model Applied by Genetic Algorithm

유전자 알고리즘을 적용한 혼합유출모형의 개발

  • Shim, Seok-Ku (Dept. of Civil Engrg. Hankyong National University) ;
  • Koo, Bo-Young (Dept. of Water Resources, ISan Engineering) ;
  • Ahn, Tae-Jin (Dept. of Civil Engrg., Hankyong National University)
  • 심석구 (한경대학교 토목공학과 대학원) ;
  • 구보영 ((주) 이산 수자원부) ;
  • 안태진 (한경대학교 토목공학과)
  • Published : 2009.03.31
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Abstract

The Tank model and the PRMS(Precipitation Runoff Modeling-modular System) model have been adopted to simulate runoff data from 1981 to 2001 year in the Seomgin-dam basin. However, the simulated runoff by each single model showed some deviations compared with the observed runoff, respectively. In this study a genetic algorithm combination runoff model has been proposed to minimize deviations between simulated runoff and observed runoff that should yield from single model such as Tank model or PRMS model. The proposed combination runoff model combining the simulated respective output of the Tank model and the PRMS model is to produce the optimum combination ratio of each single model applying to the genetic algorithm which may yield the minimum deviations between simulated runoff and observed one. The proposed combination runoff model has been applied to the Seomgin-dam basin. It has also been shown that the combination model by introducing optimal combination ratio should yield less deviations than single model such as the Tank model or the PRMS model.

탱크모형과 PRMS(Precipitation Runoff Modeling-modular System) 모형으로 섬진강댐 유역의 유출량을 1981년부터 2001년까지 모의 발생하였다. 적용된 각각의 단일모형인 Tank 모형과 PRMS 모형에 의하여 모의된 유출량은 서로 상이한 모의 양상을 나타낸다. 본 연구에서는 Tank 모형과 PRMS 모형과 같은 단일모형에 의하여 모의되는 유출량의 편차를 최소화하고 관측유출량에 보다 잘 부합되는 유출모의결과를 생산하기 위하여 유전자 알고리즘 혼합유출모형을 제안하였다. 제안된 혼합유출모형은 Tank 모형과 PRMS 모형의 각각 결과를 혼합하는 모형이며, 유전자 알고리즘을 적용하여 모의 유출량과 관측 유출량을 최소화하는 Tank 모형과 PRMS 모형에 의한 각각의 유출량의 비율을 결정하는 최적배합비를 산정하였다. 제안된 혼합 모형을 섬진강댐 유역에 적용한 결과, Tank 모형 또는 PRMS 모형과 같은 단일모형으로 유출량을 모의하는 경우보다 두 개의 모형을 적절한 배합비를 도입한 혼합 모형으로 모의된 유출량은 관측유출량과의 각종오차를 작게 하는 것을 보여 주었다.

Keywords

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