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Trends of Groundwater Quality in the Areas with a High Possibility of Pollution  

Kim, Gyoobum (한국수자원공사 K-water연구원)
Choi, Doohoung (한국수자원공사 K-water연구원)
Yoon, Pilsun (한국수자원공사 K-water연구원)
Kim, Kiyoung (한국수자원공사 K-water연구원)
Publication Information
Journal of the Korean GEO-environmental Society / v.11, no.3, 2010 , pp. 5-16 More about this Journal
Abstract
Groundwater quality monitoring wells, which is over 2,000 in South Korea, were managed to observe groundwater quality since the early 1990s. Groundwater was sampled and analyzed biannually from 781 monitoring wells located in the areas with a high possibility of pollution. The average concentrations of cyanide, mercury, phenols, hexavalent chromium, trichloroethylene, tetrachloroethylen, and 1.1.1-trichloroethane for 12 years' data of detected cases were above the groundwater quality standard, but the average concentrations of the general quality items such as pH, electric conductivity, nitrate-nitrogen, and chloride, are below the standard. To compare a quality trend for each land-use type of the monitoring site, Sen's method is used for four quality items; chloride, nitrate-nitrogen, pH, and electric conductivity. The upward trend for these items is remarkable in urbideareas and industrial complexes and this trend continues still strongly after 2001. The deviation in a trend slopes of monitoring wells becomes bigger in the mid-2000s. In conclusion, trend analysis using existing monitoring data cidebe effective to forecast the future water quality condition and the solid action to protect groundwater quality should be done in advance using a result of trend analysis.
Keywords
Groundwater monitoring well; Trend analysis; High possibility of pollution; Sen's method;
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Times Cited By KSCI : 3  (Citation Analysis)
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