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http://dx.doi.org/10.3741/JKWRA.2012.45.5.481

Assessing Sustained Drought Impacts on the Han River Basin Water Supply System Using Stochastic Streamflows  

Cha, Hyeung-Sun (Gyeongbuk Regional Reservoir Management & Operations Center, Kwater)
Lee, Gwang-Man (Korea Institute of Water & Environment)
Jung, Kwan-Sue (Department of Civil Engineering, Chungnam National University)
Publication Information
Journal of Korea Water Resources Association / v.45, no.5, 2012 , pp. 481-493 More about this Journal
Abstract
The Uncertainty of drought events can be regarded as supernatural phenomena so that the uncertainty of water supply system will be also uncontrollable. Decision making for water supply system operation must be dealt with in consideration of hydrologic uncertainty conditions. When ultimate small quantity of precipitation or streamflow lasts, water supply system might be impacted as well as stream pollution, aqua- ecosystem degradation, reservoir dry-up and river aesthetic waste etc. In case of being incapable of supplying water owing to continuation of severe drought, it can make the damage very serious beyond our prediction. This study analyzes comprehensively sustained drought impacts on the Han River Basin Water Supply System. Drought scenarios consisted of several sustained times and return periods for 5 sub-watersheds are generated using a stochastic hydrologic time series model. The developed drought scenarios are applied to assess water supply performance at the Paldang Dam. The results show that multi-year drought events reflecting spatial hydrologic diversity need to be examined in order to recognize variation of the unexpected drought impacts.
Keywords
drought scenarios; water supply performance; stochastic hydrologic time series model;
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