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KMID : 1024520160250121727
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Journal of the Environmental Sciences
2016 Volume.25 No. 12 p.1727 ~ p.1738
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Assessment of Groundwater Flow Modeling according to Hydraulic Conductivity Zonation in the Dae-jeong Watershed of Jeju Island
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Park Jae-Kyu
Kim Min-Chul
Yang Sung-Kee
Lee Jun-Ho
Kim Yong-Seok
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Abstract
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In this study, groundwater flow was analyzed targeting Dae-jeong watershed, which exhibited the largest variations of groundwater levels at the identical elevation points among the 16 watersheds of Jeju Island. The issues of the methods applied in practice were identified and improvement plans were suggested. This groundwater-flow estimates derived by applying hydraulic conductivity values onto zones of equal topographic ground level were found to be quite different from actual measured groundwater flow. Conversely, groundwater-flow estimates that utilized hydraulic conductivity values applied onto groundwater-level equipotential lines indicated relatively lesser divergences from actual measured groundwater flow. The reliabilities of the two approaches were assessed for 60 randomly selected points on DEM (digital elevation model) maps, The method using hydraulic conductivity values applied onto groundwater-level contours turned out to be the more reliable approach for the Dae-jeong watershed in Jeju Island.
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KEYWORD
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Groundwater flow, Dae-jeong watershed, Hydraulic conductivity, equipotential line, Jeju Island
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