해안지역의 지하수 염분화에 대한 시공간적 변화 = Analyzing Spatial-Temporal Variation of Groundwater Salinity in Coastal Area

다국어 초록 (Multilingual Abstract)

In this research, by selecting the east area of Jeju Island as the study object area where the salinization phenomenon appears severely, physicochemical water quality analysis about 32 tube wells of underground water and springs of 15 points was conducted. Then, the distribution properties of underground water quality composition which were acquired from the water quality analysis result and the correlation of ion components according to sea water intrusion were interpreted. First, at the result of assorting water quality properties per zone in March and September by Back’s classification type, Kujwa and Sungsan districts presented water quality composition of types of Cl-SO4 and Cl-SO4-HCO3. Next, Cl concentration of the analysis area showed high correlation of 0.83 to 0.84 with Na. Correlativity of SO4, Mg, K, and EC was about 0.08, and it was represented high. However, it was analyzed that there was no correlation of Ca and HCO3. At the result of finding correlation of analysis values of Sr and F as micro-elements related with Cl, the correlativity was presented high. In case of underground water showing the salinization phenomenon, values of Na+K and Cl are represented high. In case of underground fresh water, values of Mg and HCO3 were represented high. Lastly, to extract ion component elements which become the cause of salinization, from the result of comparing and examining the correlation by the SAS statistics method, correlations of Cl and Na which can judge salinization were 0.84 in case of Kujwa district and 0.83 in case of Sungsan district. Hence, comparatively strong correlation was represented.