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2018 Vol.51, Issue 7 Preview Page

Research Article

Variation of design flood according to the temporal resolution and periods of rainfall

강우의 시간해상도와 자료기간에 따른 설계홍수량의 변동성

Min-Seok Kima
,
Jung-Hwan Leeb
,
Young-Il Moonbc*
김 민석a
,
이 정환b
,
문 영일bc*
aResearch Project Team, Seoul Institute of Technology
bDepartment of Civil Engineering, The University of Seoul
cUrban Flood Research Institute, The University of Seoul
a서울기술연구원 연구기획팀
b서울시립대학교 토목공학과
c서울시립대학교 도시홍수연구소
* Corresponding Author
July 2018. pp. 599-606
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Abstract

Most hydrological analysis such as probability rainfall and rainfall time distributions have typically carried out based on hourly rainfall and rainfall - runoff analysis have carried out by applying different periods of rainfall time distribution and probability rainfall. In this study, to quantify the change of design flood due to the data type (hourly and minutely rainfall data) and the probability rainfall and application of different data period to the rainfall time distribution, probability rainfall is calculated by point frequency analysis according to data type and period and rainfall time distribution was calculated by Huff's quartile distributions. In addition, the change analysis of design flood was carried out by rainfall - runoff analysis applying different data periods of design rainfall time distribution. and probability rainfall. As a result, rainfall analysis using minute rainfall data was more accurate and effective than using hourly rainfall data. And the design flood calculated by applying different data period of rainfall time distribution and probability rainfall made a large difference than by applying different data type. It is expected that this will contribute to the hydrological analysis using minutely rainfall.

Keywords
Temporal resolution of rainfall
Periods of rainfall
Design rainfall
Huff’s method
Design flood

대부분의 수문분석은 시 단위 강우를 기반으로 확률강우량과 강우시간분포를 산정하고, 확률강우량과 강우시간분포의 자료기간을 달리 적용하는 방법으로 강우-유출분석을 수행하고 있다. 본 연구에서는 자료형태(시 단위와 분 단위 강우자료)와 확률강우량과 강우시간분포의 다른 자료기간 적용에 따른 설계홍수량 변화를 정량화 하고자, 자료형태와 자료기간에 따라 지점빈도해석을 통한 확률강우량 산정과 Huff의 4분위 방법을 통한 강우시간분포를 산정하였다. 또한, 확률강우량과 설계강우 시간분포의 자료기간을 달리 적용한 강우-유출분석으로 설계홍수량 변동분석을 실시하였다. 분석결과, 자료형태에서는 분 단위 강우가 시 단위 강우보다 더욱 정확하고 효과적인 강우분석을 수행할 수 있는 것으로 나타났으며, 확률강우량과 강우시간분포의 다른 자료기간을 적용하여 산정된 설계홍수량의 차 보다 자료형식에 따른 설계홍수량 결과가 보다 큰 차이를 보이는 것으로 나타났다. 이는 향후 분 단위 강우를 활용한 수문분석에 크게 기여할 것으로 판단된다.

키워드
강우 시간해상도
강우 자료기간
확률강우량
Huff의 4분위 방법
설계홍수량
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Information
  • Publisher :KOREA WATER RESOURECES ASSOCIATION
  • Publisher(Ko) :한국수자원학회
  • Journal Title :Journal of Korea Water Resources Association
  • Journal Title(Ko) :한국수자원학회 논문집
  • Volume : 51
  • No :7
  • Pages :599-606
  • Received Date : 2017-12-29
  • Revised Date : 2018-03-28; 2018-04-05
  • Accepted Date : 2018-04-05
  • DOI :https://doi.org/10.3741/JKWRA.2018.51.7.599
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