Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Analyzing the Reduction of Runoff and Flood by Arrangements of Stormwater Storage Facilities

우수저류시설의 배치방법에 따른 유출 및 침수피해 저감효과 분석

  • Park, Changyeol (Department of Safety and Environment Research, Seoul Institute) ;
  • Shin, Sang Young (Department of Safety and Environment Research, Seoul Institute) ;
  • Son, Eun Jung (Department of Safety and Environment Research, Seoul Institute)
  • 박창열 (서울연구원 안전환경연구실) ;
  • 신상영 (서울연구원 안전환경연구실) ;
  • 손은정 (서울연구원 안전환경연구실)
  • Published : 2013.01.30
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Abstract

This study analyzes the reduction effects of runoff and flood damage through different arrangements of stormwater storage facilities. Three scenarios based on the spatial allocation of storage capacity are used: concentrated, decentralized and combinative. The characteristics of runoff and flood damage by scenario are compared. The XP-SWMM model is used for runoff simulation by the probable rainfall of return period. The result shows that the concentrated arrangement of storage facilities is most effective to reduce the amount of peak flow and to delay the time of peak flow. Yet, while the concentrated arrangement is most effective to reduce the inundation damage, it is not effective to reduce runoff volume. The decentralized arrangement is most effective to reduce runoff volume. The combinative arrangement is effective not only the runoff reduction but also the reduction of flood damage. The result indicates that the flood mitigation strategies against heavy rainfall need to consider decentralized on-site arrangement for the reduction of runoff volume along with concentrated off-site arrangement of storage facilities.

Keywords

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