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The Study on Constructing Underground Wall to Prevent Seawater Intrusion on Coastal Areas  

부성안 (농업기반공사 농어촌연구원 지하수연구실)
이기철 (농업기반공사 농어촌연구원 지하수연구실)
김진성 (농업기반공사 농어촌연구원 지하수연구실)
정교철 (안동대학교 자연과학대학 지구환경과학과)
고양수 (한국수자원공사 조사기획처 지하수사업부)
Publication Information
The Journal of Engineering Geology / v.12, no.2, 2002 , pp. 215-234 More about this Journal
Abstract
Groundwater Dam is one of the reliable techniques to get huge amount of groundwater abstraction for municipal, agricultural, drinking, industrial water supply system. It can be a major technique to solve water shortage problems when it based on the sufficient watershed, proper topology, and adequate aquifer distribution and pollution control, Groundwater Dam had initiated its construction by RDC(former KARICO) in early eighties in Korea and 4 of it in total were added more until late eighty. However, this technique has shrunken its application due to gradually decreased yield rate after sever years of construction. After we studied several existing sites precisely, we concluded that the main reason of decreasing yield rate was come form engineering roughness on construction in early nineties. Theoretically, the technique itself seemed to be little detectives however, there were a little application in the fields in Korea. With the recent advance in engineering fields, those defects in construction would be no longer obstacle to construct underground wall and the technique could be a one of major ground water production technique in the future. It is essential to study following items thoroughly before select the appropriate site. The topography and the site of the underground wall, aquifer distribution, the specific technique for wall construction to block groundwater flow effectively and strict quality control during construction are critical. The surface and ground water monitoring data should be collected. Sustainability of the Groundwater Dam with huge groundwater abstraction in long term should be based on the long-term water balance analysis for each site. The water quality, environmental effect analysis and maintenance achedule should be also analyzed and planned in prior. It is suggested that the two consecutive underground wall in the coastal area to prevent seawater intrusion beneath a single wall.
Keywords
groundwater dam; subsurface dam; underground wall; seawater intrusion;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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