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2020 Vol.30, Issue 4 Preview Page

Research Article

A Study on Optical Design Factors by Artificial Recharge Performance

인공함양 주입성능평가에 의한 설계요소 산정 연구

Kyoung-Sik Won1
,
Yeoung-Dong Lee2
,
Dong-Min Shin3
,
Byeong-Jun Kim4
,
Gyoo-Bum Kim5*
원 경식1
,
이 영동2
,
신 동민3
,
김 병준4
,
김 규범5*
1President, Geotech Consultant Co., Ltd.
2Executive Vice President, Geotech Consultant Co., Ltd.
3Deputy General Manager, Geotech Consultant Co., Ltd.
4Assistant Manager, Geotech Consultant Co., Ltd.
5Professor, Department of Construction Safety and Disaster Prevention, Daejeon University
1지오텍컨설탄트(주) 사장
2지오텍컨설탄트(주) 부사장
3지오텍컨설탄트(주) 차장
4지오텍컨설탄트(주) 대리
5대전대학교 건설안전방재공학과 교수
*Corresponding Author
31 December 2020. pp. 603-615
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Abstract

The design factors of artificial recharge are determined by considering the hydrogeological characteristics of the aquifer. The optimal design factors for artificial recharge were derived after performing the injection tests step by step for each injection type (vertical well, ditch and mixed type), which were built in the test site of the study area. It was analyzed that the difference in the injection effect according to the diameter of the injection well was not large, and the 100 mm well was evaluated as appropriate in consideration of the availability and economy of land use. Since the injection effect was well maintained even in the upper rock, the depth of the injection well was proposed for the alluvial layer and the upper rock layer. On the other hand, in four cases of filter media in the ditch, it was analyzed that the penetration efficiency and the hydraulic interference effect indicated excellent injection performance when a filter medium of 10 to 30 mm diameter was filled in the ditch. In addition, the proper spacing of the injection wells was analyzed as 9~12 m considering the interference efficiency. The interference efficiency attenuation coefficient per 1 m of hole spacing was calculated to be 1.75% in this area. In the future study, the artificial recharge design factors obtained in this stage are applied and verified on site construction and operation. Also it is expected to contribute to securing water in areas where there is always a lack of water.

Keywords
aritifitial recharge
design of artificial recharge

인공함양의 설계요소 결정은 대수층의 수리지질학적 특성을 고려하여 산정하게 된다. 연구지역의 시험부지 내 구축된 주입유형별(수직정, Ditch 및 혼합형)로 주입시험을 단계별로 수행한 후 인공함양의 최적 설계요소 인자를 도출 하였다. 주입정의 구경에 따른 주입 효과의 차이가 크지 않은 것으로 분석되었으며 토지 이용의 가용성과 경제성 등을 고려하여 100 mm 규격이 적정한 것으로 평가되었다. 상부 암반까지도 주입 효과가 잘 유지되는 것으로 나타나 주입정 설치심도는 충적층 및 상부 암반층을 대상으로 결정하였다. 한편, Ditch에 의한 주입 방식의 경우에는, 10~30 mm의 여재를 채운 경우에 침투효율과 수리간섭영향이 우수한 주입 성능을 보이는 것으로 분석되었다. 또한, 수직주입정의 간격 차이에 따른 간섭효율 분석 결과, 각 주입공 간격 1 m 당 간섭효율 감쇄계수는 1.75% 산출되었으며, 주입정의 적정 간격은 9~12 m로 분석되었다. 향후 본 연구에서 산정한 인공함양 설계요소를 현장 시공 및 운영에 적용하여 검증한다면 상시 물부족 지역의 용수 확보에 기여할 것으로 본다.

키워드
인공함양
인공함양 설계
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Information
  • Publisher :Korean Society of Engineering Geology
  • Publisher(Ko) :대한지질공학회
  • Journal Title :The Journal of Engineering Geology
  • Journal Title(Ko) :지질공학
  • Volume : 30
  • No :4
  • Pages :603-615
  • Received Date : 2020-11-18
  • Revised Date : 2020-12-14
  • Accepted Date : 2020-12-14
  • DOI :https://doi.org/10.9720/kseg.2020.4.603
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