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http://dx.doi.org/10.3741/JKWRA.2018.51.11.1011

Development of groundwater level monitoring and forecasting technique for drought analysis (I) - Groundwater drought monitoring using standardized groundwater level index (SGI)  

Lee, Jeongju (Water Data Collection and Analysis Department, K-water)
Kang, Shinuk (K-water Convergence Institute)
Jeong, Jihye (Nakdonggang River Regional Head Office Business Planning Department, K-water)
Chun, Gunil (Water Data Collection and Analysis Department, K-water)
Publication Information
Journal of Korea Water Resources Association / v.51, no.11, 2018 , pp. 1011-1020 More about this Journal
Abstract
This study aims to develop a drought monitoring scheme based on groundwater which can be exploit for water supply under drought stress. In this context, groundwater level can be used as a proxy for better understanding the temporal evolution of drought state. First, kernel density estimator is presented in the monthly groundwater level over the entire national groundwater stations. The estimated cumulative distribution function is then utilized to map the monthly groundwater level into the standardized groundwater level index (SGI). The SGI for each station was eventually converted into the index for major cities through the Thiessen polygon approach. We provide a drought classification for a given SGI to better characterize the degree of drought condition. Ultimately, we conclude that the proposed monitoring framework enables a more reliable estimation of the drought stress, especially for a limited water supply area.
Keywords
SGI (standardized groundwater level index); Drought; Groundwater level; Drought early warning; Unserviced area;
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