A multi-method approach revealing the groundwater-stream water interaction in the Inbuk stream, Korea

전우현; 이진용; Woo-Yeong Cheong; Yeo-Hyun Park; Sang-Hyun Oh; Dong-Hwi Eum; Jae-Yong Park

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저자정보: 전우현 (강원대학교) 이진용 (강원대학교) Woo-Yeong Cheong (Kangwon Science High School) Yeo-Hyun Park (Kangwon Science High School) Sang-Hyun Oh (Kangwon Science High School) Dong-Hwi Eum (Kangwon Science High School) Jae-Yong Park (Kangwon Science High School)

저널정보: 한국지질과학협의회 Geosciences Journal Geosciences Journal Vol.19 No.2

발행연도: 2015.1

수록면: 325 - 340 (16page)

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We examined groundwater and stream water interaction in the Inbuk stream, Korea, using various approaches including hydrologic, thermal, hydrochemical, and isotopic methods. For this purpose, we installed four piezometers (IYHW1–4) in the streambed at 10 m interval across the stream and at depths of 0.90 to 1.54 m. We monitored water levels and water temperatures every hour using automatic transducers at the piezometers and in the stream (IYSW1) from September 2013 to April 2014. We also analyzed chemical and isotopic compositions for the hyporheic waters, stream water, and nearby groundwater in early September and late November in 2013. The water levels and hydraulic gradients revealed that three (IYHW1, 2, and 4) of the piezometers were in upwelling conditions for most of the monitoring period, except for the earliest short period (considered to be the wet season), whereas one piezometer (IYHW3) showed a reverse behavior, indicating that the gaining was dominant in the dry period. The mean calculated influx to the stream was 3.04 × 10‒4 cm/sec. Observed temperatures of stream water, hyporheic waters, and groundwater also revealed that stream water was downwelling in the early monitoring period (wet season), whereas the groundwater was generally upwelling in most of the resting period, which is consistent with the water level interpretation. Chemical composition analysis indicated that most of the waters were Ca-HCO3 type for both seasons. However, no distinctive difference between chemical compositions of water without substantial seasonal variation negated any inference on the flow conditions. The mixing ratios computed from oxygen and hydrogen isotopic compositions indicated that losing conditions were dominant in the wet season, whereas gaining conditions prevailed in the dry season. The interpretations of stream water and groundwater interactions based on these different methods are relatively consistent for this study area, indicating that such combined methods will be very useful in enhancing understanding of groundwater and stream water interaction.

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참고문헌 신청

Allen, C. D. / 2010 / A global overview of drought and heat–induced tree mortality reveals emerging climate change risks for forests / Forest Ecology and Management 259:660~684

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전우현

소속기관 강원대학교

주요연구분야 자연과학 > 지구과학 > 지질학

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소속기관 강원대학교

주요연구분야 자연과학 > 지구과학 > 지질학

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