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http://dx.doi.org/10.5389/KSAE.2012.54.3.103

Assessment of Flood Impact on Downstream of Reservoir Group at Hwangryong River Watershed  

Hwang, Soon-Ho (서울대학교 농업생명과학대학 생태조경.지역시스템공학부)
Kang, Moon-Seong (서울대학교 농업생명과학대학 조경.지역시스템공학부, 농업생명과학연구원)
Kim, Ji-Hye (서울대학교 농업생명과학대학 생태조경.지역시스템공학부)
Song, Jung-Hun (서울대학교 농업생명과학대학 생태조경.지역시스템공학부)
Jun, Sang-Min (서울대학교 농업생명과학대학 생태조경.지역시스템공학부)
Lee, Sang-Hyun (서울대학교 농업생명과학대학 생태조경.지역시스템공학부)
Choi, Jin-Yong (서울대학교 농업생명과학대학 조경.지역시스템공학부, 농업생명과학연구원)
Publication Information
Journal of The Korean Society of Agricultural Engineers / v.54, no.3, 2012 , pp. 103-111 More about this Journal
Abstract
Works for dam heightening plan have dual purposes: flood disaster prevention by securing additional storage volume and river ecosystem conservation by supplying stream maintenance flow. Now, the dam heightening project is in progress and there are 93 dam heightened reservoir. After the dam heightening project, 2.2 hundred million ton of flood control volume in reservoirs will be secured. Thus it is necessary to evaluate the effects of the dam heightening project on watershed hydrology and stream hydraulics, and resulting flood damages. This study was aimed to assess the impact of outflow from the dam heightened reservoir group on the Whangryong river design flood. The HEC-HMS (Hydrologic Engineering Center-Hydrologic Modeling System) model was used for estimating flood discharge, while HEC-5 (Hydrologic Engineering Center-5) was used for reservoir routing. This study analysed flood reduction effect on 100yr and 200yr return periods about the before and after heightening of agricultural dams. Based on the results of this study, the reduction of flood peak discharge at downstream of the reservoir group was estimated to be about 41% and 53% for 100yr and 200yr frequencies, respectively.
Keywords
Dam heightened reservoir; multi-reservoir operation; river design flood; HEC-HMS; HEC-5;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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