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J. Korean Soc. Hazard Mitig. > Volume 18(7); 2018 > Article
하천방재
Journal of the Korean Society of Hazard Mitigation 2018;18(7):613-620.
DOI: https://doi.org/10.9798/KOSHAM.2018.18.7.613    Published online December 31, 2018.
집중지속시간 특성을 반영한 HSD 방법을 이용한 부산 지역 강우시간분포 분석
도연수1, 조현곤2, 김광섭3
1정회원, 경북대학교 건설환경에너지공학부 석사과정
2경북대학교 건설환경에너지공학부 박사과정
3정회원, 경북대학교 건설환경에너지공학부 교수
Analysis of the Temporal Distribution of Rainfall Using the Heavy Storm Distribution Method Reflecting Concentrated Duration Characteristics in Busan
Yeonsu Do1, Hyungon Cho2, Gwangseob Kim3
1Member, M.S. Candidate, School of Architectural, Civil, Environmental, and Energy Eng., Kyungpook National University
2Ph.D. Candidate, School of Architectural, Civil, Environmental, and Energy Eng., Kyungpook National University
3Member, Professor, School of Architectural, Civil, Environmental, and Energy Eng., Kyungpook National University
Corresponding author:  Gwangseob Kim, Tel: +82-53-939-6859, Fax: +82-53-950-6564, 
Email: kimgs@knu.ac.kr
Received: 23 August 2018   • Revised: 24 August 2018   • Accepted: 26 October 2018
Abstract
In this study, we proposed and analyzed a rainfall temporal distribution model for determining the flood discharge of a hydraulic structure. The heavy storm distribution (HSD) method proposed in this study can generate the temporal distribution of rainfall more suitably than existing techniques by reflecting the concentrated duration characteristics of extreme rainfall events. Here, the concentration duration means a time period in which rainfall comprises 70% to 80% of the total duration of an extreme rainfall event, and the concentrated duration of 24 h heavy rainfall is about 3 h. For the application of the HSD method, extreme rainfall events were selected using actual rainfall data from Busan, and the characteristics of the concentrated duration were analyzed. Through this, the type of HSD in Busan was determined and the temporal distribution of rainfall was produced. In addition, we compared this method with the Huff method, Yen and Chow method, Mononobe method, and SCS method. As a result, the HSD method proposed in this study better reflected the intensive duration characteristics of extreme rainfall events compared to existing methods.
Key Words: Rainfall Time Distribution, HSD, Huff, Concentrated Duration
요지
본 연구에서는 수공구조물의 설계홍수량 결정을 위한 설계강우량의 강우시간분포 방법을 제시하고 분석하였다. 본 연구에서 제시하는 방법인 HSD (Heavy Storm Distribution)는 극치강우사상의 집중지속시간 특성을 반영하여 기존의 방법들보다 적합한 강우시간분포를 발생시킬 수 있다. 여기서 집중지속시간이란 극치강우사상의 총 지속시간 중 강우량이 70~80% 집중되어있는 시간을 의미한다. HSD 방법 적용을 위해 부산 지점에 관한 실측 강우자료를 이용해 극치강우사상을 선정하고 집중지속시간 특성을 분석하였으며 24시간 호우에 대하여 집중지속시간은 3시간으로 나타났다. 이를 통해 부산 지역의 HSD Type을 결정하고, 강우시간분포를 생산하였다. 그리고 이를 Huff 방법, Yen and Chow 방법, Mononobe 방법, SCS 방법과 비교하였다. 그 결과, 본 연구에서 제시한 HSD 방법이 기존의 방법들에 비해 극치강우사상의 집중지속시간 특성을 잘 반영하는 것으로 판단되었다.
핵심용어: 강우시간분포, HSD, Huff, 집중지속시간
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