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Stochastic generation of hourly rainstorm events

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Abstract

Occurrence of rainstorm events can be characterized by the number of events, storm duration, rainfall depth, inter-event time and temporal variation of rainfall within a rainstorm event. This paper presents a Monte-Carlo based stochastic hourly rainfall generation model considering correlated non-normal random rainstorm characteristics, as well as dependence of various rainstorm patterns on rainfall depth, duration, and season. The proposed model was verified by comparing the derived rainfall depth–duration–frequency relations from the simulated rainfall sequences with those from observed annual maximum rainfalls based on the hourly rainfall data at the Hong Kong Observatory over the period of 1884–1990. Through numerical experiments, the proposed model was found to be capable of capturing the essential statistical features of rainstorm characteristics and those of annual extreme rainstorm events according to the available data.

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Acknowledgments

This study is conducted under the auspice of research project “HKUST6016/01E: Investigating Issues in Rainfall Intensity-Duration and Time-Scale Relations in Hong Kong” funded by the Research Grant Council of Hong Kong Special Administration Region.

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Authors and Affiliations

  1. Department of Civil Engineering, National Chiao Tung University, Hsinchu, Taiwan

    Shiang-Jen Wu & Jinn-Chuang Yang

  2. Department of Civil Engineering, Hong Kong University of Science and Technology, Kowloon, Hong Kong

    Yeou-Koung Tung

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  1. Shiang-Jen Wu
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  2. Yeou-Koung Tung
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  3. Jinn-Chuang Yang
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Correspondence to Yeou-Koung Tung.

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Wu, SJ., Tung, YK. & Yang, JC. Stochastic generation of hourly rainstorm events. Stoch Environ Res Ris Assess 21, 195–212 (2006). https://doi.org/10.1007/s00477-006-0056-3

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