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http://dx.doi.org/10.3741/JKWRA.2014.47.11.1087

Effectiveness of Double Negative Barriers for Mitigation of Sewater Intrusion in Coastal Aquifer: Sharp-Interface Modeling Investigation  

Jung, Eun Tae (Dept. of Civil Eng., Dong-A University)
Lee, Sung Jun (Research Institute of Construction Technology and Planning., Dong-A University)
Lee, Mi Ji (Dept. of Civil Eng., Dong-A University)
Park, Namsik (Dept. of Civil Eng., Dong-A University)
Publication Information
Journal of Korea Water Resources Association / v.47, no.11, 2014 , pp. 1087-1094 More about this Journal
Abstract
Saltwater pumping method can be used to mitigate saltwater intrusion in coastal aquifers. However, the saltwater pumping well may discharge large freshwater along with saltwater, thereby wasting precious resources. A double negative barrier was proposed: an inland well to capture freshwater and a saltwater well near the coastline to pump saltwater. A previous study anaylzed effects of double negative barriers in dispersion-dominated coastal aquifers and determined the critical pumping rate at the saltwater well which minimized the saltwater ratio at the freshwater well. However, the study resulted in 1~15% of saltwater ratios, which were too high, for example, for drinking water standards. This study analyzed cases that were considered in the previous study, but for advection-dominated cases, and found that freshwater with sufficiently low saltwater ratios could be developed at the freshwater well. In addition, for optimal groundwater management of a watershed not only the minimum saltwater ratio at the freshwater well but also the least freshwater wasted at the saltwater well must be pursued.
Keywords
double negative barrier; saltwater pumping rate; freshwater pumping rate; management of coastal groundwater;
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Times Cited By KSCI : 1  (Citation Analysis)
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