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KMID : 1024520190280040423
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Journal of the Environmental Sciences
2019 Volume.28 No. 4 p.423 ~ p.433
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Hydraulic Watershed Classification and Analysis of Flow Characteristics of Groundwater on Jeju Island
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Kim Min-Chul
Yang Sung-Kee
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Abstract
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This study was carried out to identify the problems of the underground watersheds on Jeju Island, and to establish the hydraulic groundwater basin to be used as basis for the analysis of the groundwater model. In order to evaluate the adequacy of the groundwater basin on Jeju Island, a correlation analysis between elevation and groundwater level was conducted using data from 125 observation wells. The analysis, conducted with an elevation step of 100 m, exhibited values of R2 in the range 0.1653-0.8011. No clear correlation was observed between elevation and groundwater level. In particular, the eastern and western areas showed an inverse proportionality between elevation and groundwater level. The Kriging technique was used to analyze the underground water level data and to define the equipotential lines for all areas of Jeju Island. Eight groundwater watersheds were delineated by considering the direction of groundwater flow, the positions of the observation wells, and the long and short axes of the watersheds.
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KEYWORD
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Jeiu, Groundwater, Watershed, Kriging
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