Journal of Korea Water Resources Association (한국수자원학회논문집)

Korea Water Resources Association (한국수자원학회)
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Development on an Automatic Calibration Module of the SWMM for Watershed Runoff Simulation and Water Quality Simulation

유역유출 및 수질모의에 관한 SWMM의 자동 보정 모듈 개발

  • 강태욱 (한국수자원공사 K-water연구원) ;
  • 이상호 (부경대학교 공과대학 토목공학과)
  • Received : 2013.12.16
  • Accepted : 2014.03.17
  • Published : 2014.04.30
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Abstract

The SWMM (storm water management model) has been widely used in the world and is a watershed runoff simulation model used for a single event or a continuous simulation of runoff quantity and quality. However, there are many uncertain parameters in the watershed runoff continuous simulation module and the water quality module, which make it difficult to use the SWMM. The purpose of the study is to develop an automatic calibration module of the SWMM not only for watershed runoff continuous simulation, but also water quality simulation. The automatic calibration module was developed by linking the SWMM with the SCE-UA (shuffled complex evolution-University of Arizona) that is a global optimization algorithm. Estimation parameters of the SWMM were selected and search ranges of them were reasonably configured. The module was validated by calibration and verification of the watershed runoff continuous simulation model and the water quality model for the Donghyang Stage Station Basin. The calibration results for watershed runoff continuous simulation model were excellent and those for water quality simulation model were generally satisfactory. The module could be used in various studies and designs for watershed runoff and water quality analyses.

SWMM은 홍수유출 해석, 유역유출 연속모의, 수질모의가 가능한 모형으로서 전세계적으로 널리 사용되고 있는 모형이다. 하지만 유역유출 연속모의와 수질모의에는 다수의 불명확한 매개변수가 포함되어 있으므로 이는 SWMM의 사용에 제약이 되고 있다. 본 연구의 목적은 SWMM을 이용한 유역유출 연속모의와 수질모의의 정확도를 높이고 효율성을 향상시킬 수 있도록 자동 보정 모듈을 개발하는 것이다. SWMM의 자동 보정 모듈은 전역최적화 알고리즘인 집합체 혼합진화 알고리즘과 SWMM을 연계하고, SWMM 내 추정대상 매개변수의 선정 및 적절한 탐색 범위를 설정함으로써 개발되었다. 개발된 자동 보정 모듈의 적절성은 동향 수위관측소 유역에 대하여 구성된 유역유출 및 수질모의 모형의 보정 및 검증을 통해 검토되었다. 그 결과, 자동 보정 모듈을 통해 보정된 모형은 유역의 유출현상을 매우 잘 모사하였고, 수질의 경우에도 비교적 양호한 결과를 도출하였다. 개발된 자동 보정 모듈은 향후 유역유출 모의와 수질해석에 관한 다양한 연구와 설계 등에 활용될 수 있을 것이다.

Keywords

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