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http://dx.doi.org/10.7857/JSGE.2013.18.3.011

Analyzing the Effect of Groundwater Dam Construction Using Groundwater Modeling  

Kim, Ji-Wook (Korea Water Resources Corporation)
Lim, Kyung-Nam (Korea Water Resources Corporation)
Park, Hyun-Jin (Korea Water Resources Corporation)
Rhee, Bo-Kyoung (Yooshin Engineering Corporation)
Publication Information
Journal of Soil and Groundwater Environment / v.18, no.3, 2013 , pp. 11-22 More about this Journal
Abstract
SEAWAT, a linked modeling program of Visual MODFLOW was used to analyze the change in groundwater levels and salinity related groundwater dam construction in Cheongsan island, Wando-Gun, Jeollanam-Do. The steady-state model results show the groundwater flow and salinity distribution of the studied area. The groundwater flows from north-west and south-east highlands into the river, located in the middle part of the basin, and is eventually discharged to the ocean. Part of the sea water infiltrates into the river; and through the estuary's alluvium aquifer, the sea water intrusion takes place spreading to about 830 m from the ocean. The transient model results show that after the groundwater dam construction, groundwater levels will rise to a maximum of 2.0 m upstream, and the groundwater storage will increase 21,000 after 10 years. Meanwhile 31% of the total area affected by sea water intrusion will decrease. To conclude, the groundwater dam is a very useful method for a secure water resource in preparation for drought and water shortages in the island regions.
Keywords
SEAWAT; Groundwater dam; Sea water intrusion;
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