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http://dx.doi.org/10.3741/JKWRA.2014.47.5.491

Application of Streamflow Drought Index using Threshold Level Method  

Sung, Jang Hyun (Ministry of Land, Infrastructure and Transport, Yeongsan River Flood Control Office)
Chung, Eun-Sung (Department of Civil Engineering, Seoul National University of Science & Technology)
Publication Information
Journal of Korea Water Resources Association / v.47, no.5, 2014 , pp. 491-500 More about this Journal
Abstract
To estimate the severity of streamflow drought, this study introduced the concept of streamflow drought index based on threshold level method and Seomjingang Dam inflow was applied. Threshold levels used in this study are fixed, monthly and daily threshold, The $1^{st}{\sim}3^{rd}$ analysis results of annual drought, the severe hydrological droughts were occurred in 1984, 1988 and 1995 and the drought lasted for a long time. Annual compared to extreme values of total water deficit and duration, the drought occurred in 1984, 1988, 1995 and 2001 was serious level. In the results of study, because a fixed threshold level is not reflect seasonal variability, at least the threshold under seasonal level was required. Threshold levels determined by the monthly and daily were appropriate. The proposed methodology in this study can be used to forecast low-flow and determine reservoirs capacity.
Keywords
threshold level method; streamflow drought index; water deficit; duration;
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Times Cited By KSCI : 2  (Citation Analysis)
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