A Study on the Charateristic of the Groundwater Quality in Seoul

For the purpose of finding out the distributions of groundwater uses, the effect of facilities on the parameter and the correlations among measurements, various statistical analysis were carried out with the data of groundwater quality measurements from January to December in 2002. (1) The rates of groundwater for drinking water were 10.5% in Yungcheon-Gu, 10.2% in Kangdong-Gu, and 9.9% in Eunpyung-Gu. The rates of other uses of groundwater were shown to be 58.1 %(786 wells) for civil defense emergency, 22.1% (299 wells) for contamination-concerning, 9.8%(133 wells) for water quality monitoring, consisting of 90% of all groundwater. (2) The 52.6% of groundwater for drinking were demonstrated to be appropriate while 91.9% for other uses-domestic, industrial, agricultural uses- were shown to be proper. (3) For drinking water, the maximum values of colar, turbidity, NH3-N, F, and Fe were 766.9 degree, 69.16NTU, 860.0 mg/l, 5.6 mg/l and 49.87 mg/l respectively. (4) Comparision of skewness and kurtosis for Seoul groundwater, pH was found to be 0.022 and -0.524, but the T.colony, color, turbidity, NH$_3$-N, NO$_3$-N, Fe and Mn respectively fumed out to be 11.641 and 174.324, 8.501 and 80.260, 5.675 and 32.821, 19.507 and 380.994, 3.323 and 17.436, 10.544 and 134.093 and 5.979 and 39.124. (5) In cases of drinking water wells for emergency, the results of statistical analysis showed that building year of the wells, depth and pumping rate didn't affect on whether it was proper for that use or not. It were shown that there were linear correlations between depth and NO3-N(-0.171) and F(0.332) while the correlation coefficients were 0.381 and -0.169 between the building year of well and depth and pumping rate respectively.

서울지역의 지하수 수질특성에 관한 연구

서울의 지하수는 토양법이나 지하수법이 제정되기 전에 이미 오염물질의 토양 무단투기, 주유소나 유류의 지하저장 탱크 등이 들어서면서 오염에 노출되었으나 최근에 지하수에 관심이 많아지고 지하수 오염방지 계획에 따라 주기적이고 지역적인 검사가 이루어져 지하수 행정에 반명되고 있다. 서울시 소재 지하수 관정 1,352개소의 수질을 분석하여 먹는물중 적합은 52.6％,부적합은 47.4％로 나타났고 생활ㆍ농ㆍ공업용수로 적합은 91.9％인 8.1％가 부적합으로 나타났고 pH는 왜도와 첨도가 0.022와 -0.524인데 반하여 일반세균, 색도, 탁도, 암모니아성 질소, 질산성 질소, 철, 망간이 각각 11.641과 174.324, 8.501과 80.260, 5.675와 32.821, 가 19.507과 380.994, 가 3.323과 17.436, 10.544와 134.093, 5.979와 39.124로 나타났고, 지하수 먹는물 비상급수에서 설치년도, 심도 및 양수량은 수질의 적부에 영향을 미치지 않는 것으로 나타났고 관정 설치 해와 심도, 양수량은 각각 0.381, -0.169로 나타나 시간이 지날수록 지하수 관정의 굴착깊이는 깊어지고 양수량은 적어지는 것으로 나타났으며 심도와 질산성질소, 불소의 상관 계수는 -0.171, 0.332로 나타났다.