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Setup of Infiltration Galleries and Preliminary Test for Estimating Its Effectiveness in Sangdae-ri Water Curtain Cultivation Area of Cheongju, Korea

청주 상대리 수막재배지의 지중 침투형 갤러리 설치와 예비 주입시험

  • Moon, Sang-Ho (Korea Institute of Geoscience and Mineral Resources (KIGAM)) ;
  • Kim, Yongcheol (Korea Institute of Geoscience and Mineral Resources (KIGAM)) ;
  • Kim, Sung-Yun (Korea Institute of Geoscience and Mineral Resources (KIGAM)) ;
  • Ki, Min-Gyu (Chonbuk University, Dept. of Bioenvironmental Chemistry)
  • 문상호 (한국지질자원연구원 지질환경연구본부 지하수생태연구센터) ;
  • 김용철 (한국지질자원연구원 지질환경연구본부 지하수생태연구센터) ;
  • 김성윤 (한국지질자원연구원 지질환경연구본부 지하수생태연구센터) ;
  • 기민규 (전북대학교 생물환경화학과)
  • Received : 2016.10.20
  • Accepted : 2016.11.21
  • Published : 2016.12.28

Abstract

Most of water curtain cultivation (WCC) area in Korea has been inveterately suffering from the gradual draw-down of groundwater level and related shortage of water resources at the late stage of WCC peak time. To solve this problem, artificial recharge techniques has been recently applied to some WCC area. This study introduces infiltration gallery, which is one of the artificial recharge methods, and tentatively examined the effectiveness of three galleries installed at Sangdae-ri WCC area of Cheongju City. Seven galleries are set up at each empty space between eight vinyl houses in this area and its dimension is designed as 50 cm in each width and height and 300 cm in each length. Installation process was including bed excavation, backfill with gravels and silica sands, and completion of gallery by equipment of piezometer and covering with non-woven cloth. For each B, C, D gallery, 3 types of test including preliminary, four step and one long-term injection were performed. The first preliminary test showed the rough relations between injection rates and water level rise as follows; 20 cm and 30 cm level rise for $33.29{\sim}33.84m^3/d$ and $45.60{\sim}46.99m^3/d$ in B gallery; 0 cm, 16 cm and 33 cm level rise for $21.1m^3/d$, $33.98m^3/d$ and $41.69m^3/d$ in C gallery; 29 cm and 42 cm level rise for $48.10m^3/d$ and $52.23m^3/d$ in D gallery. Afterwards, more quantitative results estimating effectiveness of artificial recharge were reasoned out through stepped and long-term injection tests, which is expected to be employed for estimating water quantity re-injected into the aquifer through these galleries by natural injection over the period of WCC peak time.

Acknowledgement

Grant : 수변 충적층 지하수위 복원 기술, 복합 인공함양 기법을 이용한 지하수 확보.활용기술 개발

Supported by : 한국지질자원연구원

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