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The Development of Coupled SWAT-SWMM Model (II) Model Characteristics and Evaluation

SWAT-SWMM 결합모형의 개발 (II) 모형의 특징 및 평가

  • 김남원 (한국건설기술연구원 수자원연구부) ;
  • 원유승 (한국건설기술연구원 수자원연구부)
  • Published : 2004.07.01

Abstract

The continuous long-term rainfall-runoff simulation model SWAT has the advantage of being able to account for various land use, however, SWAT lacks the capability of simulating the drainage characteristics of urban area. On the other hand, SWMM, which is the most popular model for runoff analysis of urban watershed, has the advantage of being capable of considering surface and drainage characteristics in urban area, but SWMM cannot easily account for land use other than urban area within a watershed. In this study, SWAT-SWMM model, which builds on the strengths of SWAT and SWMM, has been applied to the Osan River Watershed which is a tributary watershed to the Gyung-Ahn River. From the application, the results from coupled SWAT-SWMM model has been compared to the ones from SWAT for each hydrologic component such as evapotranspiration, surface runoff, groundwater flow, and watershed and channel discharge, and the runoff characteristics of two models for each hydrologic component has been discussed.

유역규모의 장기 유출모형인 SWAT은 다양한 토지이용을 고려할 수 있는 장점이 있는 반면, 도시지역에 대한 배수특성을 충분히 고려할 수 없는 단점을 가지고 있다. 반면, 세계적으로 도시지역의 유출현상 규명에 널리 이용되는 SWMM 모형은 도시지역의 지표면 특성과 배수특성을 모두 고려할 수 있는 장점이 있는 반면 유역 내 도시지역 이외의 토지이용에 대한 고려가 힘들다는 단절이 있다. 본 연구에서는 두 모형의 장점을 살리고, 단점을 보완한 SWAT-SWMM 결합모형을 경안천내 오산천 유역에 적용하였다. 이로부터 SWAT-SWMM 결합모형에 대한 모식결과와 SWAT 모형에 의한 모의결과를 증발산, 지표면유출량, 토양으로부터의 유출량, 유역 및 하도 유출량 등 수문성분별로 비교ㆍ평가하였고, 두 모형의 수문성분별 유출모식의 특징에 대하여 논의하였다

Keywords

References

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