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http://dx.doi.org/10.7464/ksct.2020.26.1.39

Groundwater Quality in Gyeongnam Region Using Groundwater Quality Monitoring Data: Characteristics According to Depth and Geological Features by Background Water Quality Exclusive Monitoring Network  

Cha, Suyeon (Department of Production Technology and Engineering, Graduate School of Convergence Science and Technology, Gyeongsang National University)
Seo, Yang Gon (Department of Chemical Engineering/RIGET, Gyeongsang National University)
Publication Information
Clean Technology / v.26, no.1, 2020 , pp. 39-54 More about this Journal
Abstract
This study analyzed the groundwater quality according to the depth and geological features in Gyeongsangnam-do area using groundwater quality monitoring network data to grasp the groundwater quality characteristics and to provide basic data for policy making on efficient groundwater management. Five hundred and three data sets were acquired from background water quality exclusive monitoring network in soil groundwater information system for five years (2013 ~ 2017). Except for the total coliforms and tracer items such as mercury, phenol, and others, the parameters of water quality were significant or very significant, depending on depth and geological features. As the depth got deeper, the average value of pH and electrical conductivity increased; water temperature, dissolved oxygen, oxide reduction potential, arsenic, total coliforms, and turbidity decreased; and total unfit rate for drinking water standards was lower. It was found that the sum of the positive and negative ions was the highest in the clastic sedimentary rock and the lowest in metamorphic rock. The total unfit rate for drinking water standards was the highest for metamorphic rocks, followed by clastic sedimentary rock and unconsolidated sediments and, finally, intrusive igneous rock with the lowest penetration. The Na-Cl water type, which indicated the possibility of contamination by external pollutants, appeared only at some points in shallow depths and in clastic sedimentary rocks.
Keywords
Groundwater quality; Background water quality exclusive monitoring network; Depth; Geological feature;
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