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http://dx.doi.org/10.3741/JKWRA.2006.39.9.779

A Study on the Improvement of Huff's Method for Applying in Korea : II. Improvement of Huff's Method  

Jang Su-Hyung (Research Center for Disaster Prevention Science and Technology, Korea Univ.)
Yoon Jae-Young (Dept. of Env. System Engr., Korea Univ.)
Yoon Yong-Nam (Water Resources Dept., Saman Corporation)
Publication Information
Journal of Korea Water Resources Association / v.39, no.9, 2006 , pp. 779-786 More about this Journal
Abstract
In this study, we propose a new method that utilizes rainfall data in and out of a basin, which is greater than 25.4mm for point rainfall or 12.7mm for areal mean rainfall respectively. From our analysis, most frequent quartile for point and areal mean rainfall were found to be the same in general for various rainfall duration intervals. From an evaluation of design rainfall per each rainfall duration distributed in time by the MOCT(Ministry of Construction and Transportation) version of Huff's method and this study, peak rainfall intensity by this study was found to be greater than the one by MOCT, but there were no consistent increase or decrease of this difference with rainfall durations. Using the distributed design rainfall per each duration by MOCT and this study, corresponding flood inflow hydrographs were simulated and compared each other. Contrary to the case of peak rainfall intensity, difference in peak flow by both methods per each rainfall duration started to increase from about 12-hr duration. Especially, the difference in peak flow was significant when critical rainfall duration was considered, and this trend was similar for peak flows of other rainfall durations. Therefore, the method proposed in this study is thought to be the effective procedure for the construction of dimensionless cumulative rainfall curve that is representative of a basin while considering time distribution characteristics for different rainfall durations.
Keywords
Huff' method; rainfall time distribution characteristics; representative rainfall mass curve; peak flood;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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