• Journal of the Korean Society of Groundwater Environment
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• v.7 no.1
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• pp.1-7
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• 2000

In order to reduce the groundwater contamination around the Kimpo landfill in Korea by the leakage of the leachate within it, The method establishing 5 sets of Radial Collector Well Laterals(RCWLs) within the landfill, the method utilizing the wells dewatering the condensed water, the method establishing an interception wall to the 2nd layer at the circumference of the landfill and 22 sets of RCWLs within it, and the method establishing an interception wall to the 3rd layer and 40 sets of RCWLs were studied. Hydraulic parameters were measured for this study and then the groundwater flow and contaminant transport systems around the Kimpo landfill were analyzed with the MODFLOW and MT3D models. Conclusively, the method establishing an interception wall to the 2nd layer and 22 sets of RCWLs was evaluated as the most stable and economical option to reduce groundwater contamination concentration below drinking water standards.

• Proceedings of the Korea Water Resources Association Conference
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• 2020.06a
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• pp.289-289
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• 2020

국내에서 강변여과수는 1990년대 말 이후 기술개발이 지속적으로 이루어져 왔으나, 아직까지도 방사형집수정의 적정 취수량 결정에 필요한 조사 및 설계 단계에서의 적정 조사물량에 대한 기준이 마련되어 있지 않은 실정이다. 방사형집수정 1기당 취수량 결정은 경험식에 의한 방법과 수치모델링에 의한 방법을 병행하여 이루어지고 있으나, 취수량 평가에 가장 중요한 수리전도도(k)의 오차로 인하여 설계단계에서 추정한 취수량과 시공 이후의 취수량에 차이가 존재하고 이로 인한 다양한 논쟁이 존재하고 있다. 본 연구에서는 경기도 안성천에서 시공된 방사형집수정의 사례를 토대로 조사단계에서의 적정 시추공의 갯수를 제시하고자 하였다. 수평정의 2m 간격으로 채취된 토양 및 총 8공의 시추공에서 채취된 토양 등 총 164개의 입도분석 자료를 이용하여 대표요소면적(Representative elementary area, REA)의 개념을 적용하여 적정 조사공의 갯수를 분석한 결과, 안성천 방사형집수정 규모의 경우에는 1기당 6~7개의 조사공이 필요함을 도출하였다. 본 연구에서는 경기도 안성천의 사례를 토대로 수행한 만큼 향후 낙동강 등 타 지역의 사례를 토대로 확인되고 검증된다면 강변여과수의 조사 기준으로서 활용될 수 있을 것이다.

• Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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• 2002.04a
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• pp.85-92
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• 2002

When the United Nation classified as Korea is the one of the water deficit country. The consensus was made that the water is the one of the precious national resources. Government increases their R/D budget trying to get more clean water bodies. For instances, 'Sustainable Water Resources Development' project is the one of major title in '21 Century Frontier Research project and there are several small research projects are undergoing by the Ministry of Agriculture and KARICO. However, when the environmental preservation issue has been get more emphasis, construction of the Surface Dam met the blockage from the environmentalists due to the problem of the their water buried area. Since the most fitting site for surface dam had been used in the past, some engineer move their focus on modification of the existing Dam's height to enlarge its capacity or dredging the bottom of the reservoir recently However dredging evoke water quality problem in return by accumulated materials at the bottom. Last year the Dong Gang Dam plan has been canceled by environmental problem in water buried area of the reservoir. With the point of this view, ground water gets more focus for the one of the useful alternative for clean water bodies. Underground dam technique which had widely applied once in the early nineteen eighties by the KARICO and attenuated due to engineering insufficiency. The technique is newly studied with the advanced engineering technique. Still groundwater usage rate in Korea is much lower comparing with the advanced countries and has many rooms to develop. Wells, under ground dam and radial collector wells are typical facilities up to now. There is little application in Korea for the Recharge Dam, which had been widely used in the advanced countries. The Recharge Dam is technique to conjunct surface water and groundwater body together, This technique had developed to increase groundwater recharge at the beginning This research is the result of the study on the possibility of the development of the new technology, Groundwater Reservoir' which was modified from Recharge Dam. Groundwater Reservoir is like a deep artificial lakes trenched in hard rock aquifer to get groundwater. The advantage of the Groundwater Reservoir is followings 1) It can be developed at the plains area, not in the deep valley 2) Huge water body can be developed without dam 3) Small buried area comparing surface water dam makes the least environmental effect. 4) Trenching cost can be substitute by the income of the selling rock debris 5) Outfit of the reservoir can be modified to match with the site prospect 6) Rock debris can be used as constructing materials 7) It can be used as groundwater recharge system when the heavy rains comes 8) The reservoir looks like scenery lake with huge clean water bodies.

• Geophysics and Geophysical Exploration
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• v.21 no.4
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• pp.255-261
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• 2018

The purpose of this study was to obtain a large amount of saline groundwater around coastal aquaculture farms. Thus, we have proposed a method for evaluating the potential amount of saline groundwater resources through the combined analysis of geophysical methods. Refraction seismic survey and electrical resistivity survey were conducted in the vicinity of fish farm at Hadong, Gyeongnam Province. As the result, the velocity of layer in the range of 900 ~ 2,400 m/s was found to be saltwater aquifer with high water content. Geological drilling investigation and analysis of soil samples also showed that the soil at study area was the same as the texture of sandy loam layer in agricultural radial collector wells installed by KRC (Korea Rural Community Corporation). Futhermore, the study area turned out to be quite possible to develop saline groundwater from the coastal shallow aquifer. Therefore, parallel analysis of refraction seismic surveys and electrical resistivity surveys at coastal area are expected to be very useful for the detection of the aquifer composed of sand and gravel layers with high porosity in sandy sedimentary layers along the coastal area.