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Non-stationary Intensity-Duration-Frequency Curves & Design Flood for Drainage System Design Coping with Climate Change

  • Crisisonomy
  • Abbr : KRCEM
  • 2015, 11(10), pp.237-255
  • Publisher : Crisis and Emergency Management: Theory and Praxis
  • Research Area : Social Science > Public Policy > Public Policy in general

Se Jin Jeung 1 Hong, Il 2 Kim Byung Sik 1

1강원대학교
2한국건설기술연구원

Accredited

ABSTRACT

The design approach of the drainage system has limitation not to consider the extreme rainfall condition of which I-D-F curve is non-stationary by climate change and variability. Therefore, the assumption that the I-D-F curve is stationary to design drainage system maybe not available in the climate change, because climate change has changed the characteristics of extremes rainfall event to be non-stationary. In this paper, design rainfall by rainfall duration and non-stationary I-D-F curve are derived by the conditional GEV distribution. Furthermore, the effect of design flood discharge with increase of rainfall intensity was analyzed by distributed rainfall-runoff model, S-RAT. Although there are some difference by rainfall duration, the traditional I-D-F curves underestimates the extreme rainfall events for high-frequency rainfall condition. As a result, this paper suggests that traditional I-D-F curves could not be suitable for the design of drainage system under climate change condition.

Citation status

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