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자료유형
학술저널
저자정보
구민호 (공주대학교 지질환경과학과) 김태근 (공주대학교 지질환경과학과) 김성수 (동부엔지니어링) 정성래 (성지엔지니어링) 강인옥 (한국수자원공사) 이찬진 (한국수자원공사) 김용철 (한국지질자원원구원)
저널정보
한국지하수토양환경학회 지하수토양환경 지하수토양환경 제18권 제5호
발행연도
2013.1
수록면
65 - 76 (12page)

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The water-table fluctuation (WTF) method has been often used for estimating groundwater recharge by analysis of waterlevel measurements in observation wells. An important assumption inherent in the method is that the water level rise is solely caused by precipitation recharge. For the observation wells located near a stream, however, the water-level can be highly affected by the stream level fluctuations as well as precipitation recharge. Therefore, in applying the WTF method, there should be consideration regarding the effect of stream-aquifer interactions. Analysis of water-level hydrographs from the National Groundwater Monitoring Wells of Korea showed that they could be classified into three different types depending on their responses to either precipitation recharge or stream level fluctuations. A simple groundwater flow model was used to analyze the errors of the WTF method, which were associated with stream-aquifer interactions. Not surprisingly, the model showed that the WTF method could greatly overestimate recharge, when it was used for the observation wells of which the water-level was affected by streams. Therefore, in Korea, where most groundwater hydrographs are acquired from wells nearby a stream, more caution is demanded in applying the WTF method.

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