Journal of The Korean Society of Agricultural Engineers (한국농공학회논문집)

The Korean Society of Agricultural Engineers (한국농공학회)
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Analysis of Storm Event Characteristics for Stormwater Best Management Practices Design

강우유출수 관리시설의 설계를 위한 강우사상 특성 분석

  • Kim, Hak Kwan (Institutes of Green Bio Science and Technology, Seoul National University) ;
  • Ji, Hyun Seo (Institutes of Green Bio Science and Technology, Seoul National University) ;
  • Jang, Sun Sook (Institutes of Green Bio Science and Technology, Seoul National University)
  • Received : 2017.09.06
  • Accepted : 2017.10.11
  • Published : 2017.11.30
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Abstract

The objective of this study is to investigate whether the daily rainfall depth derived from daily data represents the event rainfall depth derived from hourly data. For analysis, the 85th, 90th, and 95th percentile daily rainfall depths were first computed using daily rainfall data (1986~2015) collected at 63 weather stations. In addition, the storm event was separated by the interevent time definition (IETD) of 6, 12, 18, and 24 hr using hourly rainfall data. Based on the separated storm events, the 85th, 90th, and 95th percentile event rainfall depths were calculated and compared with the using hourly rainfall data with the 85th, 90th, and 95th percentile daily rainfall depths. The event rainfall depths computed using the IETD were greater than the daily rainfall depths. The difference between the event rainfall depth and the daily rainfall depth affects the design and size of the facility for controlling the stormwater. Therefore, the designer and policy decision-maker in designing the stormwater best management practices need to take into account the difference generated by the difference of the used rainfall data and the selected IETD.

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