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http://dx.doi.org/10.5389/KSAE.2022.64.2.047

Effects of Duration and Time Distribution of Probability Rainfall on Paddy Fields Inundation  

Jun, Sang-Min (Convergence Major in Global Smart Farm, Seoul National University)
Kim, Kwi-Hoon (Department of Rural Systems Engineering, Seoul National University)
Lee, Hyunji (Department of Rural Systems Engineering, Seoul National University)
Kang, Ki-Ho (Rural Research Institute, Korea Rural Community Corporation, KRC)
Yoo, Seung-Hwan (Department of Rural and Bio-Systems Engineering, Chonnam National University)
Choi, Jin-Yong (Department of Rural Systems Engineering, College of Agriculture and Life Sciences, Research Institute of Green Bio Science and Technology, Global Smart Farm Convergence Major, Seoul National University)
Kang, Moon-Seong (Department of Rural Systems Engineering, Research Institute for Agriculture and Life Sciences, Institute of Green Bio Science and Technology, Seoul National University)
Publication Information
Journal of The Korean Society of Agricultural Engineers / v.64, no.2, 2022 , pp. 47-55 More about this Journal
Abstract
The objective of this study was to analyze the effect of the duration and time distribution of probability rainfall on farmland inundation for the paddy fields in the drainage improvement project site. In this study, eight drainage improvement project sites were selected for inundation modeling. Hourly rainfall data were collected, and 20- and 30-year frequency probability rainfalls were estimated for 14 different durations. Probability rainfalls were distributed using Intensity-Duration-Frequency (IDF) and Huff time distribution methods. Design floods were calculated for 48 hr and critical duration, and IDF time distribution and Huff time distribution were used for 48 hr duration and critical duration, respectively. Inundation modeling was carried out for each study district using 48 hr and critical duration rainfalls. The result showed that six of the eight districts had a larger flood discharge using the method of applying critical duration and Huff distribution. The results of inundation depth analysis showed similar trends to those of design flood calculations. However, the inundation durations showed different tendencies from the inundation depth. The IDF time distribution is a distribution in which most of the rainfall is concentrated at the beginning of rainfall, and the theoretical background is unclear. It is considered desirable to apply critical duration and Huff time distribution to agricultural production infrastructure design standards in consideration of uniformity with other design standards such as flood calculation standard guidelines.
Keywords
Inundation; rainfall duration; time distribution; drainage improvement project; probability rainfall;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
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