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자료유형
학술대회자료
저자정보
Chae, Gi-Tak (Department of Earth Environment Science, and Environmental Geosphere Research Laboratory, Korea University) Yun, Seong-Taek (Department of Earth Environment Science, and Environmental Geosphere Research Laboratory, Korea University) Kim, Dong-Seung (Department of Earth Environment Science, and Environmental Geosphere Research Laboratory, Korea University) Choi, Hyeon-Su (Department of Earth Environment Science, and Environmental Geosphere Research Laboratory, Korea University)
저널정보
한국지하수토양환경학회 한국지하수토양환경학회 학술발표회 한국지하수토양환경학회 2004년도 임시총회 및 추계학술발표회
발행연도
2004.1
수록면
113 - 114 (2page)

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In order to classify the groundwater recharge characteristics in an urban area, a time series analysis of groundwater level data was performed. For this study, the daily groundwater level data from 35 monitoring wells were collected for 3 years (Fig. 1). The use of the cross-correlation function (CCF), one of the time series analysis, showed both the close relationship between rainfall and groundwater level change and the lag time (delay time) of groundwater level fluctuation after a rainfall event. Based on the result of CCF, monitored wells were classified into two major groups. Group I wells (n=10) showed a fast response of groundwater level change to rainfall event, with a delay time of maximum correlation between rainfall and groundwater level near 1 to 7 days. On the other hand, the delay time of 17-68 days was observed from Group II wells (n=25) (Fig. 1). The fast response in Group I wells is possibly caused by the change of hydraulic pressure of bedrock aquifer due to the rainfall recharge, rather than the direct response to rainfall recharge.

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