KSCE Journal of Civil and Environmental Engineering Research (대한토목학회논문집)

Korean Society of Civil Engeneers (대한토목학회)
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Flooding Risk Assessment Using Flooding Characteristic Values

침수특성치를 이용한 침수위험성 평가

  • 안정환 (연세대학교 사회환경시스템공학부) ;
  • 김건우 (연세대학교 사회환경시스템공학부) ;
  • 조원철 (연세대학교 사회환경시스템공학부)
  • Received : 2012.11.27
  • Accepted : 2013.03.16
  • Published : 2013.05.30
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Abstract

This research is on the methodology of flood risk assessment using flooding characteristic values. Necessity of design magnitude for flood control considering floods was judged by plotting peak flow with respect to frequency and duration, and flooding magnitude was defined with 6 flooding characteristic values which were proposed to be significant factors when assessing flooding magnitude. Precipitation data used in the assessment modeling were applied by combining all the possible precipitation events. After overlapping the simulated results with precipitation matrix by flooding characteristic values, contour map was drawn, and Flooding characteristic contour graph for possible rainfall events were suggested in respect of all possible precipitation. Flooding characteristic contour graph for possible rainfall events was confirmed that reducing of damage magnitude of each flood characteristic value was figured out easily. The flood risk assessment methods suggested in this study would be a good reference for urban drainage system design, which only focuses on pipe conduit.

본 논문은 침수특성치를 이용한 도시유역의 침수위험성 평가방법을 제시하는 연구이다. 2010년 9월 21일 청계천상류의 효자배수분구(광화문 광장일대)에서 발생한 침수피해를 XP-SWMM 2010을 이용하여 모의하였다. 강우발생빈도별, 지속시간별로 관로첨두유출량 값을 구하여 침수상태를 분석한 결과 관로 내 첨두유출량만으로는 침수상태를 충분히 해석할 수 없음을 확인 할 수 있었다. 따라서 도시지역의 침수피해규모를 표현할 수 있는 침수특성치 6가지를 새롭게 정의하였으며 발생가능한 강우조합(강우량, 강우지속시간)을 침수특성치별로 산정하여 침수위험성 평가방법을 연구하였다. 모의 결과를 침수특성치별로 강우조합에 중첩하여 등치선도로 나타낸 "발생가능강우별 침수특성 등치선도"를 개발하여 이를 근거로 발생할 수 있는 모든 강우형태에 대한 침수위험성을 평가할 수 있음을 확인할 수 있었다. 또한 유역의 상태가 변하거나 치수계획규모를 변화시키는 것에 대한 침수특성치별 침수규모 해소정도를 쉽게 파악 할 수 있음을 확인하였다.

Keywords

References

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