• Title, Summary, Keyword: Riverbank filtration

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Development of Technology on Water Thermal Energy Utilization of Riverbank(including Alluvial and Riverbed deposits) Filtration (강변여과수(충적층 및 하상) 열자원 활용 기술 개발)

  • Kim, Hyoung-Soo;Seo, Min-Woo;Jung, Woo-Sung;Song, Yoon-Ho
    • 한국신재생에너지학회:학술대회논문집
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    • pp.591-594
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    • 2005
  • Geothermal energy becomes to be one of the promising energy sources. In this study, technology using water thermal energy from riverbank filtration system(including alluvial and riverbed deposit) is reviewed and checked as an energy resources. The objects of this study are (1) long-term monitoring of alluvial and riverbed sites, (2) preliminary design of cooling and heating system at riverbank filtration facility, and (3) calculation of potential groundwater heat energy, including riverbank filtration system. Measuring data of alluvial and riverbank filtration show slight fluctuations comparing to temperature of atmospheric air which indicates that groundwater obtained from the riverbank filtration system have a sufficient potential as a source of cooling and heating energy.

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Site Suitability Analysis for Riverbank Filtration Using Game Theory (게임이론을 활용한 강변여과 개발 적지선정)

  • Lee, Sang-Il;Lee, Sang-Sin
    • Journal of Korea Water Resources Association
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    • v.43 no.1
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    • pp.95-104
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    • 2010
  • The tap water supply in Korea mainly depends on the surface water. However, the advanced water purification process becomes a necessity due to the deterioration of surface water quality and the risk of accidental spill. High cost of water treatment and public concerns make the decision makers turn to riverbank filtration as an alternative to the surface water. Riverbank filtration has been employed for water supply in many developed countries for more than 150 years. In Korea, riverbank filtration has drawn attention since 1990s as a supply source having potential to stably meet the ever-increasing water demand. Some cities located in the Nakdong River Basin are currently supplying water through riverbank filtration. This work studies the site suitability analysis for riverbank filtration using game theory. Theory of games, which is a branch of applied mathematics used in social sciences (most notably economics), biology, engineering and computer science, was applied to candidate locations for the selection of riverbank filtration site. We proposed a policy game model as a new method adopting a probabilistic approach. The model developed turned out to be an effective tool for site selection.

Effect of Colloids on Contaminant Transport in Riverbank Filtration (강변여과에서 콜로이드 물질이 오염물 거동에 미치는 영향)

  • Kim, Dae-Hwan;Lee, Sang-Il;Yoo, Sang-Yeon
    • Proceedings of the Korea Water Resources Association Conference
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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.

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Site Suitability and Developable Amount Assessment for Riverbank Filtration in the Han River (I) (한강에서의 강변여과수 개발을 위한 적지선정 및 개발가능량 산정(I))

  • Lee, Sang-Il;Lee, Sang-Sin
    • Journal of Korea Water Resources Association
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    • v.41 no.8
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    • pp.825-834
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    • 2008
  • Riverbank filtration for water supply has been employed for about 150 years in developed countries. In Korea, the feasibility of riverbank filtration has been investigated since 1990's for large river basins, to find a solution to stably meet the ever-increasing demand for water. Recently, some cites in the Nak-dong River Basin have been supplying the water through riverbank filtration. This research studies the feasibility of riverbank filtration in Seoul. Analytic Hierarchy Process (AHP), which selects the most optimal alternative by hierarchically classifying various attributes and then quantifying the importance of each attribute, was applied to candidate locations for the selection of riverbank filtration site. The Kwangnaru district, which has advantages in water quality and close connectivity to the existing water purification facility, was selected as the most optimal site.

Estimating Groundwater Level Change Associated with River Stage and Pumping using Time Series Analyses at a Riverbank Filtration Site in Korea

  • Cheong, Jae-Yeol;Hamm, Se-Yeong;Kim, Hyoung-Soo;Lee, Soo-Hyoung;Park, Heung-Jai
    • Journal of Environmental Science International
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    • v.26 no.10
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    • pp.1135-1146
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    • 2017
  • At riverbank filtration sites, groundwater levels of alluvial aquifers near rivers are sensitive to variation in river discharge and pumping quantities. In this study, the groundwater level fluctuation, pumping quantity, and streamflow rate at the site of a riverbank filtration plant, which produces drinking water, in the lower Nakdong River basin, South Korea were interrelated. The relationship between drawdown ratio and river discharge was very strong with a correlation coefficient of 0.96, showing a greater drawdown ratio in the wet season than in the dry season. Autocorrelation and cross-correlation were carried out to characterize groundwater level fluctuation. Autoregressive model analysis of groundwater water level fluctuation led to efficient estimation and prediction of pumping for riverbank filtration in relation to river discharge rates, using simple inputs of river discharge and pumping data, without the need for numerical models that require data regarding several aquifer properties and hydrologic parameters.

Evaluation of pumping capacity of radial collector wells using Milojevic's equation in the National River Watershed, Korea (Milojevic 경험식을 활용한 주요 국가하천 유역에서 방사형집수정의 강변여과수 취수가능량 평가)

  • Oh, Se-Hyoung;Jeong, Jae-Hoon;Park, Sang-Gyu
    • 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.

Site Suitability and Developable Amount Assessment for Riverbank Filtration in the Han River (II) (한강에서의 강변여과수 개발을 위한 적지선정 및 개발가능량 산정(II))

  • Lee, Sang-Il;Yoo, Sang-Yeon;Lee, Sang-Sin
    • Journal of Korea Water Resources Association
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    • v.41 no.8
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    • pp.835-843
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    • 2008
  • In Korea, riverbank filtration has drawn attention since 1990's as an alternative having potential to stably meet the ever-increasing water demand. Some cities located in the Nak-dong River Basin are currently supplying water through riverbank filtration. This research is on the application of riverbank filtration for stable water quality in Seoul. For this purpose, we have evaluated developable amount of water with riverbank filtration for the Han River. This paper focuses on the Kwangnaru site, which was selected through a systematic analysis in the companion paper. We have conducted groundwater modeling for a proposed system of wells and an artificial lake. In the Kwangnaru district, the river length to constitute a well system was identified to be about 1,200m, due to the topography and the field condition such as ecosystem preservation zone. After many design changes, it was found that the maximum developable amount of $23.36\;million\;m^3$/year could be obtained, when 16 pumping wells were built in every 80 meters along with an artificial lake upstream.

Development of Riverbank Filtration Water Supply and Return System for Sustainable Green House Heating and Cooling (지속가능 온실 냉난방을 위한 강변여과수 취수 및 회수시스템 개발)

  • Cho, Yong;Kim, Dae-Geun;Kim, Hyoung-Soo;Moon, Jong-Pil
    • The KSFM Journal of Fluid Machinery
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    • v.15 no.2
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    • pp.20-29
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    • 2012
  • The green house on the waterfront is air-conditioned by a water-source heat pump system with riverbank filtration water. In order to supply riverbank filtration water in alluvium aquifer, the riverbank filtration facility for water intake and recharge, two pumping wells and one recharge well, has been constructed. The research site in Jinju, Korea was chosen as a good site for riverbank filtration water supply by the surface geological survey, electrical resistivity soundings, and borehole surveys. In the results of two boreholes drilling at the site, it was revealed that the groundwater table is about 3 m under the ground, and that the sandy gravel aquifer layer in the thickness of 6.5 m and 3.5 m occurs at 5 m and 7 m in depth below the ground level respectively. To prevent the recharge water from affecting the pumped water which might be used as heat source or sink, the distance between pumping and recharge wells is designed at least 70 m with a quarter of recharged flow rate. It is predicted that the transfer term, the recharge water affects the pumping well, is over 6 months of heating season. Hydrogeological simulation and underground water temperature measurement have been carried out for the pumping and recharge well positions in order to confirm the capability of sustainable green house heating and cooling.

Assessment for geothermal energy utilization in the riverbank filtration facility (강변여과수 시설에서의 지열에너지 활용 가능성 평가)

  • Shin, Ji-Youn;Kim, Kyung-Ho;Bae, Gwang-Ok;Lee, Kang-Kun;Jung, Woo-Sung;Suk, Hee-Jun;Kim, Hyeong-Su
    • 한국신재생에너지학회:학술대회논문집
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    • pp.485-488
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    • 2007
  • Riverbank filtration is a kind of artificial aquifer recharge for the fresh water supply. By construction of several production wells penetrating the riverbank, surface water withdrawn from the river would pass riverbed. This extracted water is well known to be cooler than surface water in summer and warmer than surface water in winter, showing more constant water temperature. This characteristic of extracted water is applied to geothermal energy utilization. Prediction of the annual temperature variation of filtrated water is the major concern in this study. In Daesan-myeon, Changwon-si, Gyeongsangnam-do, South Korea, riverbank filtration facility has been on its operation for municipal water supply and thermal energy utilization since 2006. Appropriate hydraulic and thermal properties were estimated for flow and heat transfer modeling with given pumping rate and location. With the calibrated material properties and boundary conditions, we numerically reproduced measured head and temperature variation with acceptable error range. In the numerical simulation, the change of saturation ratio and river stage caused by rainfall was calculated and the resulting variation of thermal capacity and thermal conductivity was considered. Simulated temperature profiles can be used to assess the possible efficiency of geothermal energy utilization using riverbank filtration facility. Influence of pumping rate, pumping location on the extracted water temperature will be studied.

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Determining Optimum Pumping Rates of Groundwater in Ttansum Island Related to Riverbank Filtration

  • Lee, Chung-Mo;Hamm, Se-Yeong;Choo, Yeon-Woo;Kim, Hyoung-Soo;Cheong, Jae-Yeol
    • Journal of Environmental Science International
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    • v.27 no.10
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    • pp.831-844
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    • 2018
  • Riverbank Filtration (RBF) is a kind of indirect artificial recharge method and is useful in obtaining higher-quality source water than surface water when procuring municipal water. This study evaluated optimal riverbank filtered water and the productivity of the radial collector wells on Ttansum Island in the area downstream of the Nakdong River, where Gimhae City is constructing a municipal water plant for the purpose of acquiring high-quality water. The RBF wells are planned to provide water to the citizens of Gimhae City through municipal water works. Groundwater flow modeling was performed with the following four scenarios: (a) 9 radial collector wells, (b) 10 radial collector wells, (c) 10 radial collector wells and two additional vertical wells, and (d) 12 radial collector wells. This study can be useful in determineing the optimum production rate of bank filtrated water not only in this study area but also in other places in Korea.