Analysis of Flood Control Effects of Heightening of Agricultural Reservoir Dam

• Published in: Journal of The Korean Society of Agricultural Engineers Vol. 55; no. 4
• Main Authors: Lee, G.J., Kangwon National University, Chuncheon, Republic of Korea, Park, K.W., Inha University, Incheon, Republic of Korea, Jung, Y.H., Korea Rural Community Corporation, Uiwang, Republic of Korea, Jung, K.W., Water Management Co. Ltd., Seoul, Republic of Korea, Jeon, J.H., Andong University, Andong, Republic of Korea, Lee, J.M., Kangwon National University, Chuncheon, Republic of Korea, Lim, K.J., Kangwon National University, Chuncheon, Republic of Korea, Jung, I.K., Korea Rural Community Corporation, Uiwang, Republic of Korea
• Format: Journal Article
• Language: Korean
• Published: 01.07.2013
• Subjects: EMBALSES; HEC-RAS; HEC-ResSim; Heightening; Reservoir; RESERVOIR D'EAU; WATER RESERVOIRS
• ISSN: 1738-3692

Annual average precipitation of Korea is 1,277 mm and around 2/3 of annual precipitation and 74 % of available water resources occurred during monsoon period. In recent years, many agricultural reservoirs have been heightened to increase flood control capacity, reduce flooding damage at downstream areas, and provide sustainable environmental flow during drought period. Thus in this study, the flood control effects of heightening of reservoir banks were simulated with HEC-ResSim and HEC-RAS models. These modes were applied to Bonghak reservoir and it was found that flood control effects were 3～4.5 % with 7 -m heightening. Also, with proper operation (1 m lower of full water level) of reservoir right before the monsoon period, flooding at downstream could be prevented even with design storm of 80 -year recurrence interval. As shown in this study, heightening of agricultural reservoir provides positive effects in flood control and flood damage reduction.