• 한국지하수토양환경학회:학술대회논문집
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• 한국지하수토양환경학회 2002년도 총회 및 춘계학술발표회
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• pp.167-172
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• 2002

Seoul subway system has been constructed to solve traffic difficulties of Seoul metropolitan, and now is the major public transportation. However, the more line has added in the system the deeper the bottom of the tunnel base. And a huge amount of groundwater along the line has seeping into the tunnel. Several subway stations has pumping system to extract the groundwater to the outside and consequently, groundwater table along the line has declined gradually. Groundwater table has dropped about 40 meters at some areas, There was some study for the proper usage of the abstracted groundwater and the project to use the groundwater has launched already by the local government. However. more serious problem is expected on quality degradation of soil and groundwater as the decline of groundwater table along the subway line. This study suggests that the detailed groundwater environmental study should be made as soon as possible for this. If there is any pollution leaking at the surface area of the groundwater depression, the pollution will be seep into the subway tunnel in some day even though the time will be different with the soil material and hydraulic characteristics of the aquifer. And the polluted area of the soil and groundwater would be enlarged along the pathway The study on possibility of the soil subsidence and reducing surface water flow in small creek were also needed. This study suggest one of the counter measurement that restoring the declined groundwater table after groundwater environmental study

• 물과 미래
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• 제6권2호
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• pp.19-29
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• 1973

The progressive contamination of water resulted from man's activity and the use of fertilizers is not restricted only to surface water, but also the shallow groundwater is affected. This type of groundwater contamination is mainly restricted to areas composed of permeable, nonconsolidated sediments forming a shallow aquifer. The chloride and the sulfate resulted from man's activity and the use of fertilizers were measured to study the variations of the groundwater contamination. In general, (1) When water level rises, the rate of groundwater contamination becomes less and when water level declines, the rate of contamination is increased. (2) The highly contaminated season is the early-summer and the less contaminated season is the winter or after rainy season. (3) The groundwater in weathering zone without covering layer. (4) The degree of contamination of wells is increased with the increase of well depth and lowing the water table, because of increasing contaminated water from enlargement of the area of influence of the well.

• 한국건축시공학회지
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• 제10권3호
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• pp.91-97
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• 2010

현재 건물 부력에 대한 보호조치로 경제성 및 효율성 측면을 고려하여 영구배수 공법의 사용이 증가하고 있다. 영구배수공법은 건축물에 접하는 지하수를 외부로 배수시켜 건축물에 작용하는 부력을 근본적으로 제거하는 공법으로, 영구배수공법 사용시 유출지하수가 발생하게 된다. 또한 우리나라는 국제인구행동연구소(PAI)에서 지정한 물 부족 국가로 지정되어 유출지하수의 활용이 요구되고 있지만 이에 대한 평가프로세스가 아직 충분하지 않다. 따라서 본 연구는 현장 적용 사례를 통해 현장 단위에서 유출되는 지하수의 활용여부를 결정할 수 있는 평가 프로세스를 구축하고 경제성을 분석하였다. 그 결과 상수도와 비교한 10년간 상수절감 비용을 통해 유출지하수의 활용이 가능한 것으로 나타났다.

• 한국지능시스템학회:학술대회논문집
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• 한국퍼지및지능시스템학회 1993년도 Fifth International Fuzzy Systems Association World Congress 93
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• pp.1175-1176
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• 1993

This paper introduces a new model for forecasting groundwater level on the basis of analysing defect of finite element method. The new model is built with fuzzy sets and neural networks. It is convenient for use. We computed the groundwater level of one city in P. R. China with it and got a very satisfactory result. It can be popularized to corecast groundwater level of mine.

• 한국지하수토양환경학회:학술대회논문집
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• 한국지하수토양환경학회 2004년도 총회 및 춘계학술발표회
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• pp.323-327
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• 2004

The groundwater system of the Cheonggyecheon watershed is very complicated because it is influenced by many factors such as pumping out, groundwater leakages into subway stations, civil use of groundwater, and leaking water from water supply and sewage lines. So the characterization and evaluation of tile groundwater flow and contaminant transport in the Cheonggyecheon water system is quite a difficult task. The purpose of this study is to analyze of the influence to the 'groundwater' below the Cheonggyecheon watershed by the 'surface water' on the Cheonggyecheon stream after the restoration. We have so far collected groundwater quality data, hydrogeologic aquifer parameters, and tile amount of leakages into subway stations and its influence on the groundwater system of the Cheonggyecheon. Results show that groundwater level was influenced by the direction and depth of a 녀bway station. This study will continue to monitor groundwater quality, a water level fluctuation relation between rainfall and groundwater recharge for further investigation of the groundwater flow system in Cheonggyecheon.

• 한국지하수토양환경학회:학술대회논문집
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• 한국지하수토양환경학회 2004년도 임시총회 및 추계학술발표회
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• pp.326-329
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• 2004

The groundwater system of the Cheonggyecheon watershed is very complicated because it is influenced by many factors such as pumping out, groundwater leakages into subway stations, civil use of groundwater, and leaking water from water supply and sewage lines. So the characterization and evaluation of the groundwater flow and contaminant transport in the Cheonggyecheon water system is quite a difficult task. The purpose of this study is to analyze the influence on the‘groundwater’ below the Cheonggyecheon watershed by the‘maintenance water’on the Cheonggyecheon stream after the restoration. We have so far collected groundwater quality data, hydrogeologic aquifer parameters, and the amount of leakages into subway stations and its influence on the groundwater system. Results show that groundwater level was influenced by the direction and depth of subway tunnel. This study will continue to monitor groundwater quality, a water level fluctuation relation between rainfall and groundwater recharge for further investigation of the groundwater flow system in the Cheonggyecheon watershed.

• 한국지하수토양환경학회:학술대회논문집
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• 한국지하수토양환경학회 2001년도 총회 및 춘계학술발표회
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• pp.191-193
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• 2001

This paper presents the result of groundwater analysis in Changwon area and the characteristics of the groundwater properties. Changwon city conducted groundwater analysis at 551 sites in 1996 and 1997. The water quality is suitable as groundwater use at 466 sites (84.6 %) and exceeds maximum contaminant levels (MCLs) at 85 sites (15.4 %). Major contaminants are total bacteria, coliform and nitrate-N. DNAPLs, e.g. TCE and PCE are detected in the areas of industrial complex and residence. The detection of TCE and PCE is due to organic solvents from manufacturing companies. They are also derived from laundries, Photographer's studios, septic tanks, etc. In addition, fifty groundwater samples were analyzed. Iron, manganese, zinc, copper, lead, aluminum and fluorine are detected in nearly all the groundwater samples. The groundwaters shown on the Piper diagram mostly belong to Ca-HCO$_3$ type.

• 자원환경지질
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• 제54권3호
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• pp.331-352
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• 2021

The relationship of both heavy metals and major elements in soil, plants, and groundwater was studied in a hyper-arid area and depends completely on the groundwater to cover its all needs. The study reviles that 27.3% of the studied groundwater was strongly acidic and has very low pH values (

• 지질공학
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• 제30권4호
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• pp.435-446
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• 2020

The use of groundwater in Korea has increased in recent years to the point where its extraction is restricted in times of drought. This work models the groundwater pumping field as a confined aquifer in a simplified simulation of groundwater flow. It proposes a genetic algorithm to maximize groundwater development using a conceptual model of a steady-state confined aquifer. Solving the groundwater flow equation numerically calculates the hydraulic head along the domain of the problem; the algorithm subsequently offers optimized pumping strategies. The algorithm proposed here is designed to improve a prior initial groundwater management model. The best solution is obtained after 200 iterations. The results compare the computing time for five simulation cases. This study shows that the proposed algorithm can facilitate better groundwater development compared with a basic genetic algorithm.

• 자원환경지질
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• 제47권3호
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• pp.219-225
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• 2014

전국의 지하수 관정은 2012년 기준 1,474 천 개소이며 지하수 이용량이 총 용수 이용량의 12%를 차지하고 있다. 수자원장기기본계획은 2021년 전국 용수 수요가 공급을 초과할 것으로 전망하고 있어 지하수 이용이 더욱 중요한 과제가 되고 있다. 우리나라는 지하수 활용을 위한 인공함양이나 강변여과 보다 관정에 크게 의존하고 있으므로 관정의 경제성에 대한 평가가 우선적으로 이루어져야 할 것이다. 따라서 본 논문은 관정에 의한 지하수자원 활용이 경제적인지 아닌지를 분석하는 것에 목적을 둔다. 관정의 편익은 크게 3가지로 나누어 첫째, 활용가치로 음용수 및 농공용수의 공급가치, 둘째 비활용 가치로 잠재활용 대비 미래를 위한 부존가치를 포함하고 있다. 또한 비용은 관정의 설치비용 및 교체비용, 관리비용, 그리고 폐공의 환경오염 비용 등을 모두 포함한다. KDI의 수자원사업 예비타당성 가이드라인과 미국 환경청 그리고 세계은행의 지하수자원 비용-편익분석 모델을 원용하여 관정의 비용편익 비율을 계산하였다. 그 결과 지하수 관정의 편익이 비용보다 2.98배 높아 지하수 관정에 의한 지하수자원 공급이 경제성이 있는 것으로 나타났다.