Hydraulic analysis of a radial collector well for riverbank filtration near Nakdong River, South Korea

Lee, Eun-Hee; Hyun, Y.; Lee, Kang‐Kun; Shin, Jehyun

doi:10.1007/s10040-011-0821-3

Cited by 22 publications

(14 citation statements)

References 19 publications

(30 reference statements)

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“…Using radial well will reduce the load of abstracting water from the centre well and is capable of improving the quality of raw water as it has travelled a distance from its original source which could be the river or the infiltration of rainfall to the ground. Lee et al [10] mentioned that many RBF wells have been used in riparian zones, including both vertical and horizontal (radial collector type) wells. Radial collector wells consist of a vertical caisson, to which a number of horizontal arms are connected.…”

Section: River Bank Filtrationmentioning

confidence: 99%

New entry point of membrane technology for public water treatment plants in Malaysia

Daud¹,

Ujang²,

Noor³

2019

Desalination and Water Treatment

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Membrane applications in public water treatment plants (WTP) in Malaysia have seen more setbacks than successes. Its early applications in a few locations encountered operational problems which saw many systems cease operations due to high operating expenses, membrane fouling or poor raw water quality. The main issue, however, was financial-related in view of the fact that the water tariff has been regulated and heavily subsidised. Both capital expenses (CAPEX) and operating expenses (OPEX) have not been affordable within such a framework. The power consumption of a 3 million L d-1 (MLD) hybrid membrane WTP subjected to study consumed 1.5 kWh m-3 of electricity as compared with 0.43 kWh m-3 for a conventional system in the same district. Besides that, cartridge filters had to be changed on a weekly basis as compared with filter media which can last more than 5 years. Capital cost of a membrane WTP is at least twice more expensive than conventional systems. Based on the standard of raw water adopted in the Malaysia, it is imperative that operators raise raw water quality standards prior to treatment whether through natural process or forced, physically or chemically. Downstream reservoir, river bank infiltration and radial well system have been applied in several projects in Malaysia and had successfully resulted in the high quality of raw water. However it has always been restricted from being implemented holistically due to financial constraints. Hybrid offriver storage implemented as interim measure to improve raw water quantity had indicated prospect of improving raw water to reach higher standards. This paper compares the raw water quality of various non-conventional raw water abstractions, followed by discussion on the proposed entry point of membrane systems in Malaysia for public WTPs.

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Section: River Bank Filtrationmentioning

confidence: 99%

New entry point of membrane technology for public water treatment plants in Malaysia

Daud¹,

Ujang²,

Noor³

2019

Desalination and Water Treatment

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“…Takođe, stvoreni su uslovi za realnije predstavljanje geometrije slojeva i korita vodotoka. U svetu su konkretni zadaci u modeliranju BHD najčešće rešavani upotrebom FEFLOW softvera/koda [15,16].…”

Section: Kratak Pregled Hidrodinamičkihunclassified

Hydrodynamic simulation and analysis of groundwater regime as impacted by radial collector wells: A case study of Belgrade's water supply source

Božović¹,

Polomčić²,

Bajić³

2015

Tehnika

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“…The drawdown affects the mixing ratio of different water sources by altering the infiltration capacity of river water. The quantitative calculation of the mixing ratio is mainly based on the study of river water and groundwater interaction, including field tests and model tests, dynamic water analysis, base‐flow separation, hydrochemistry, and groundwater dynamics (Ascott, Lapworth, Gooddy, Sage, & Karapanos, ; Lee, Hyun, Lee, & Shin, ; Rodgers et al, ; Shamsuddin et al, ). Groundwater dynamics and hydrochemical methods have been widely used to calculate the mixing ratio between the surface water and groundwater.…”

Section: Introductionmentioning

confidence: 99%

The impact of well drawdowns on the mixing process of river water and groundwater and water quality in a riverside well field, Northeast China

Zhu

Zhai

et al. 2019

Hydrological Processes

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Riverbank filtration (RBF) has been widely used throughout the world as an effective means to regulate surface water and groundwater resources and pretreat raw water for municipal water supply. The quality of the water from a riverside well field and the mixing ratios of surface water and groundwater is primarily impacted by the hydrodynamic processes in the RBF system. The RBF system is largely controlled by the water exploiting system in addition to the natural hydrologic condition of the river–aquifer system. As one of the most important design parameters of the riverside well field, the drawdown of groundwater level greatly determines the water head differences between the river water and groundwater as well as the field flow net, which subsequently impacts the mixing of river water and groundwater and water quality significantly. This study aimed to improve the understanding of the mixing process between the surface water and groundwater and estimate the impact of the RBF on the mixing ratio of surface water–groundwater and water quality quantitatively. A set of field pumping tests with various groundwater level drawdowns were carried out independently and successively at a riverside field with a single pumping well near the Songhua River in Northeast China in August 2017. During these tests, the water levels and hydrochemical parameters of the Songhua River, the adjacent aquifer, and the pumping well were monitored. The dynamic mixing process of the river water and groundwater and water quality under various drawdown conditions were analysed systematically using analytical methods. The results obtained from Dupuit method and the Mirror Image method in conjunction with the Hydrochemical Tracing method showed that the pumping water directly from the river water reached 60% ± 10% after a steady flow net was established. The larger the proportion of the pumping water captured from the river, the better quality of the pumping water was, because the quality of the river water (only limited to some water quality parameters monitored which were minority) was better than that of the groundwater. The results also showed that total Fe, TDS, total hardness, CODMn, and K+ were relatively sensitive to the changes of groundwater drawdown, and their concentrations decreased with an increase in the groundwater drawdown. It can be concluded that both the mixing ratio of the surface water and the groundwater and the water quality of the riverside well field can be regulated through adjusting the designed drawdown of the groundwater level, which is helpful for the design and the optimization of the riverside well water intake engineering.

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Hydraulic analysis of a radial collector well for riverbank filtration near Nakdong River, South Korea

Cited by 22 publications

References 19 publications

New entry point of membrane technology for public water treatment plants in Malaysia

New entry point of membrane technology for public water treatment plants in Malaysia

Hydrodynamic simulation and analysis of groundwater regime as impacted by radial collector wells: A case study of Belgrade's water supply source

The impact of well drawdowns on the mixing process of river water and groundwater and water quality in a riverside well field, Northeast China

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