KSCE Journal of Civil and Environmental Engineering Research (대한토목학회논문집)

Korean Society of Civil Engeneers (대한토목학회)
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An Analysis of Groudwater Budget in a Water Curtain Cultivation Site

청원 수막재배 지역의 물수지 특성 분석

  • Chang, Sun Woo (Korea Institute of Civil Engineering and Building Technology) ;
  • Chung, Il-Moon (Korea Institute of Civil Engineering and Building Technology)
  • 장선우 (한국건설기술연구원 수자원.하천연구소) ;
  • 정일문 (한국건설기술연구원 수자원.하천연구소)
  • Received : 2015.09.24
  • Accepted : 2015.10.12
  • Published : 2015.12.01
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Abstract

In Korea, rural groundwater development faces new challenge, which have not been experienced so far. The problem is a groundwater depletion by the water curtain cultivation (WCC) during winter season. This study investigates the groundwater depletion using three-dimensional finite difference groundwater flow program, MODFLOW to verify the water budget of the shallow aquifer of Cheongweon area. Interdisciplinary research, which has become a worldwide trend, has been adopted in studying groundwater modeling in field scale. In particular, the method of groundwater recharge estimation adopted precise modeling techniques, SWAT to groundwater flow modeling. Based on qualified field data, the model calibrated and validated its reliability. The objective of this study is to simulate various stream-aquifer interactions according to groundwater pumping with artificial boundaries, such as weirs and drainage system. We also analyzed a seasonal variation of cumulative water budget of the site to quantify the groundwater depletion and recovery in the pumping field.

우리나라에서는 기존에 경험하지 못한 농촌의 지하수 개발문제가 새로운 도전으로 대두되고 있다. 이른바 수막재배(Water Curtain Cultivation : WCC)라 불리우는 동절기 농업활동이 주된 이슈이다. 본 연구에서는 대상지역인 충북 청원군 수막재배지역내 충적대수층의 물수지를 검증하기 위해 3차원 유한차분모형인 MODFLOW를 구축하였다. 세계적인 추세인 학제간 융합방식을 현장규모에 맞게 도입한 지하수 모델링을 수행하였고, 특히 정밀한 지하수 함양량의 입력을 위해 SWAT모형을 이용한 소유역 지하수 함양량을 계산하였으며 양질의 현장자료를 기반으로 모형의 신뢰성을 확보하기 위한 검보정이 진행되었다. 본 연구의 목표는 하천의 보와 배수 시스템과 같은 인위적인 경계조건하에서 지하수 양수가 진행될 때 하천과 대수층의 다양한 상호작용을 모의하는 것이다. 또한 부지내의 누적 물수지의 계절변화를 분석함으로써 지하수 고갈과 회복량을 정량화할 수 있었다.

Keywords

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  2. Quantification of seasonally variable water flux between aquifer and stream in the riparian zones with water curtain cultivation activities using numerical simulation vol.53, pp.2, 2017, https://doi.org/10.14770/jgsk.2017.53.2.277
  3. Long-term groundwater budget analysis based on integrated hydrological model for water curtain cultivation site: Case study of Cheongweon, Korea vol.52, pp.3, 2016, https://doi.org/10.14770/jgsk.2016.52.3.201
  4. Analysis and evaluation of hydrological components in a water curtain cultivation site vol.49, pp.09, 2016, https://doi.org/10.3741/JKWRA.2016.49.9.731