• The Journal of Engineering Geology
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• v.13 no.4
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• pp.457-474
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• 2003

This study aims to elucidate characteristics of groundwater level fluctuation at riverbank filtration sites in Daesan-myeon, Changwon City. Groundwater level fluctuation, river water level change and stream-aquifer interaction are very important to estimate optimal discharge rate of the pumping well. Water level contours from February 2003 to October 2003 show normal decreasing trend toward the Nakdong river with the hydraulic gradient of 0.008. However, flow reversion occurs when groundwater is discharged at the pumping wells or rise of the Nakdong river by rainfall. The fluctuation of the Nakdong river ranges 0 - 10 m msl. Autocorrelation analysis was conducted to the groundwater levels measured on the six monitoring wells (DS1, DS2, DS3, DS4, DS6 and DS7). The analyzed waterlevel data can be grouped into three: group 1 (DS1 and DS3) represents strong linearity and long memory effect, group 2 (DS1 and DS6) intermediate linearity and memory, and group 3 (DS4 and DS7) weak linearity and memory. Waterlevels of group 1 wells are relatively closely related to the change of river-water level. Those of group 2 wells are largely affected by the pumping and the river-water level, and those of group 3 wells are strongly linked to pumping.

• Journal of Korean Society of Environmental Engineers
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• v.34 no.6
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• pp.430-437
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• 2012

In order to obtain information on the design parameters of the horizontal laterals in floodplain filtration, laboratory-scale sand-box experiments were performed where the head distributions on the laterals and the groundwater profiles were measured according to the change in parameters including lateral diameter, hydraulic conductivity of the sand, water level at the well and raw-water supply rate. Measured data were analyzed using a numerical code in order to identify the discharge intensity distribution along the laterals. It was observed from the result that the lowering of the water level at the well had minimal adverse effect on the performance of the floodplain filtration. Results also elucidated that the low conveyance of the laterals to transmit the filtrate was compensated and supplemented by a natural augmentation in horizontal conveyance through the aquifer when the raw-water supply rate exceeded the adequate recovery rate. With this mechanism, the water quality is expected to improve further since the travel distance through the aquifer is amplified. Based on these findings it can be suggested that the diameter of the lateral used in the floodplain filtration may be smaller than those in riverbank/bed filtration. It was also found that the ratio between the head loss occurring in a lateral and the total head loss in the floodplain filtration was proportional to the exit velocities of the laterals, which may be used to design and/or evaluate the lateral in floodplain filtration.

• 한국신재생에너지학회:학술대회논문집
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• 2011.05a
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• pp.200.2-200.2
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• 2011

This study was carried out in order to estimate the greenhouse performance for Ground filtration water source heat pump which was installed for supplying the heat to the paprika greenhouse in Jinju city. Experimental area of Greenhouse was $3,300m^2$, For keeping the heat from greenhouse, single plastic covering and double thermal screen was installed. With considering all of greenhouse insulation condition and designed heatng temperature, heating capacity for experimental greenhouse was calculated as 320,000kcal/hr. Coefficient of performance(COP) of Ground filtration water source heat pump was gauged and greenhouse heating performance was tested from Febuary 1 to Febuary 28 in 2011. The result showed that COP of heat pump was in the range of 3.7~4.7 and COP of heating system was in the range of 3.0~3.5. The vaule of COP was very high and the temperature inside greenhouse was well corresponded to the setting temperature of greenhouse environment controlling system. lots of Ground filtration water made the the number of well fewer and the expense for installing heating system cheaper than that of geothermal system used custmarily. and this system went beyond the limitation of intaking amount of groundwater in normal Groundwater source heat pump.

• Journal of Korean Society of Environmental Engineers
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• v.33 no.7
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• pp.536-543
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• 2011

In order to find the best design of artificial stream for the riverbed filtration in multi-purpose filtration pond, a mathematical model was developed employing the energy line and the Manning's formula and was analyzed by the Euler's technique. Various design factors were investigated through scenario analyses of the artificial stream using the model. Results showed that the appropriate slope of the stream bottom was 2/10,000 and the appropriate infiltration rate at the streambed was $2.5m^3/m^2-day$ for the pond with the area of 100 ha, and that the Manning's roughness coefficient in this case was expected to be about 0.026 and the maximum water-depth was less than 1m. It was also shown that the longer the artificial stream the more advantageous it became for the riverbed filtration. Furthermore, results showed that it was not an efficient way to prevent clogging of the streambed by increasing the flow velocity of the stream and that the performance was higher near a weir with a large head drop.

• Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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• 2002.04a
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• pp.93-97
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• 2002

This research introduces some preliminary results of bank filtering intake method adopted in Dalseo area, Nakdong River. This intake method has been planned to supply water resources of 41,000 ㎥/day to Goryeong-Gun and Seongju-Gun in 2016. It is believed that the bank filtering intake method can afford to supply 41,000 ㎥/day amount of water resources and that the raw water quality using the method has more advantages in water treatment than direct surface water intake. Even though the safety yield about individual vertical well is roughly estimated to about 2,000 ㎥/day, it is desirable to decrease the safety yield to about 1,000 ㎥/day in the consideration of long term and simultaneous well pumpings and other unknown factors. Ongoing study will give basic data and new techniques to solve the problems appearing in application of bank filtering method as well.

• Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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• 2004.04a
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• pp.438-442
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• 2004

국가적인 수자원 다변화 정책의 일환으로 충적층을 활용한 강변여과, 지하수댐, 직접 함양 등의 다양한 충적층 지하수 인공함양 활용 가능성이 점차적으로 증대되고 있지만, 국내에서는 이를 구체적으로 활용하기 위하여 필요한 충적층 지하수의 개발 및 관리를 위한 충적층 수문지질도를 찾아보기 힘든 실정이다. 따라서, 본 발표에서는 부여 군수리 지역을 시범 대상 지역으로 선정하여 수자원 개발을 위한 충적층 활용 가능성을 평가하기 위해 기본적으로 필요한 지형적, 지질학적, 수리적 및 환경적 요소들을 포함하는 시범 충적층 수문지질도를 작성하였다. 본 충적층 수문지질도에는 지하수위 및 수질 변화, 지표 토양조건 및 지하 대수층 분포 등를 추정할 수 있는 다양한 자료들을 포함하고 있으며, 대부분의 이들 자료는 직접 현장 조사를 통해 획득되었다. 이러한 시범 충적층 수문지질도의 작성은 향후 충적층 지하수의 개발 및 관리시에 기본 자료로 활용될 것이다. 그러나, 앞으로 보다 정밀하고 효용성 있는 충적층 수문지질도 작성을 위해서는 이번 시범 작성을 참조하여 보다 많은 개선과 표준화가 요구된다.

• Proceedings of the Korea Water Resources Association Conference
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• 2005.05b
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• pp.1398-1402
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• 2005

Riverbank filtration is a natural process using alluvial aquifers to remove contaminants and pathogens in river water for the production of drinking water. In riverbank filtration, the understanding of contaminant transport is an important task for the production of high quality drinking water. This study investigates the transport behavior of hydrophobic organic contaminants when colloids (dissolved organic matter and bacteria) are present in the aquifer. A mathematical model for the transport of contaminants is developed and solved numerically for various situations. Results show that in the riverbank filtration the presence of DOM and bacteria enhances the mobility of contaminant significantly. Sensitivity analysis indicates that the distribution of the total aqueous Phase contaminant is significantly affected by distribution coefficients which account for affinity of solid or colloidal Phase to contaminant.

• Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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• 2002.09a
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• pp.129-133
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• 2002

본 고에서는 지하 대수층 생태계 및 그에 대한 외국의 연구사례를 개괄하여 소개하고, 지속가능한 지하수 개발에 있어서 대수층 생물이 갖는 의미에 대하여 고찰하였다. 아울러 국내에서 발견된 대수층 생물을 소개하고 향후 연구방향을 설정하였다. 지하 대수층은 다양한 생물로 구성된 독특한 생태계를 가지고 있다. 생물학적 평형상태를 유지하는 경우 이 생태계는 대수층이 장기간 양호한 수질을 유지할 수 있는 기능을 가진다. Parabathynellidae, Parastenocaris 및 선충류의 발견을 통해서 고령군 다산면 대수층이 지하수 생태계 연구를 위한 적합한 대상임이 확인되었다. 향후 연구방향으로서 1) 지하수 동물상 조사, 2) 생태계 구성원에 대한 Autecology 및 Synecology적 접근, 3) Bioremediation 및 Bioindicator 관련 연구 등이 제시되었다.

• Journal of Soil and Groundwater Environment
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• v.17 no.3
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• pp.10-20
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• 2012

The pumping capacity of riverbank filtration using radial collector wells at the Geum, Yeongsan, Seomjin, and Nakdong rivers was evaluated using Milojevic's equation. Assessment of the radial collector wells' pumping capacity in riverbank filtration was carried out using a case study in which one set of collector wells is installed in the watershed of each river. Nakdong River was evaluated to have the highest pumping capacity for riverbank filtration. The areas capable of producing over 10,000 $m^3$ per day were found mostly in the Nakdong River.

• Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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• 2006.04a
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• pp.68-71
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• 2006

Seasonal fluctuation of groundwater level by pumping amount and stream discharge at the riverbank filtrate site adjacent to the Nakdong River in Daesan-Myeon was characterized. Groundwater level fluctuation shows increase in wet season (June, July, August and September) and decrease in dry season (the other months). Seasonal variation of pumping amount shows similar trend to the groundwater fluctuation due to higher consumption of potable water in summer. The relation of specific capacity, Nakdong River and pumping quantity was analyzed. The logarithmic relationship between specific capacity and the stream discharge gives high correlation coefficient, 0.96. This fact indicates that the increase of stream discharge rate reduces the rate of drawdown in the pumping area in wet season.