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2017 Vol.50, Issue 5 Preview Page
Evaluating characteristics of runoff responses by rainfall direction

호우 방향성에 의한 유역 유출응답 특성 평가

Changyeol Parka
,
Chulsang Yoob*
박 창열a
,
유 철상b*
aDepartment of Environmental and Urban Planning, Jeju Research Institute
bSchool of Civil, Environmental and Architectural Engineering, Korea Universit
a제주연구원 환경도시연구부
b고려대학교 건축사회환경공학부
*교신저자. *Corresponding Author. 
31 May 2017. pp. 347-358
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Abstract

This study examined characteristic differences by the rainfall direction on the runoff responses. The directional characteristics of hydrological components in a basin were quantified by von Mises distribution. The runoff hydrograph was derived using the result of convolution integration of each distribution and this hydrograph was compared with GIUH model and observed data. As a result, it was found that runoff response by rainfall direction was more similar the observed rainfall-runoff data than the runoff result using GIUH model. These results implies that runoff modeling could be improved by considering directional components in hydrologic analysis. This study would be helpful to reduce uncertainties of hydrologic analysis considering a non-linearity of rainfall-runoff process by the rainfall direction.

Keywords
Direction
Runoff response
Non-linearity

본 연구에서는 호우 방향성에 의한 유역 유출응답 특성을 살펴보았다. 이를 위해 호우와 하천망의 방향적 특성을 확률밀도함수로 정량화하였고, 각 방향성 함수를 회선적분하여 호우 방향성의 고려 유무에 따른 유출응답 특성을 비교하였다. 그 결과, 호우 방향성을 고려한 유출모의 결과는 호 우 방향성을 고려하지 않은 경우에 비해 관측 유출자료와 더욱 유사함을 알 수 있었다. 이러한 결과는 호우 방향성을 고려한 유역 반응함수에 의해 유출모의 결과가 보다 개선될 수 있음을 나타낸다. 따라서 본 연구성과는 호우 방향성에 따른 유역 반응함수의 비선형성을 고려함으로써 유출모의 의 불확실성을 줄이는데 기여할 수 있을 것으로 기대된다.

키워드
방향성
유출응답
비선형성
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1) 가상유역에 대한 적용사례를 다룬 Park and Yoo (2016) “Effects on Characteristics of Instantaneous Unit Hydrograph by Rainfall Direction”의 연구내용을 일부 재정리하였음.
Information
  • Publisher :KOREA WATER RESOURECES ASSOCIATION
  • Publisher(Ko) :한국수자원학회
  • Journal Title :Journal of Korea Water Resources Association
  • Journal Title(Ko) :한국수자원학회 논문집
  • Volume : 50
  • No :5
  • Pages :347-358
  • Received Date : 2017-01-22
  • Revised Date : 2017-04-17
  • Accepted Date : 2017-04-19
  • DOI :https://doi.org/10.3741/JKWRA.2017.50.5.347
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