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

Content Provider	Springer Nature Link
Author	Lee, Eunhee Hyun, Yunjung Lee, Kang Kun Shin, Jiyoun
Copyright Year	2011
Abstract	A radial collector well is used for the extraction of a large amount of groundwater without causing a deep drawdown at the well’s center, and it is appropriate for the supply of municipal water through riverbank filtration (RBF). Flow path changes caused by water extraction through a radial collector well were simulated to estimate the amount of river water induction at a RBF site associated with Nakdong River in South Korea. The structure of the screened horizontal arms of a radial collector well was examined with respect to effective riverbank filtration. The relative ratio of the river water induced to the radial collector well compared to the total groundwater extraction was estimated to be 27–52%. The amount of induced river water varies with the distance of a horizontal arm from the river, indicating that the location and structure of the collector well is significant for RBF. In all simulation cases, the maximum drawdown of the groundwater level near the collector well was 2.1 m, which is not significant considering the substantial pumping rate at the study site. It was concluded that RBF radial collector wells can be used at the study site for a sustainable water supply.Les puits à drains rayonnants sont utilisés pour produire de grandes quantités d’eau souterraine sans occasionner de rabattements importants au niveau des puits. Ces puits conviennent pour l’alimentation en eau d’une municipalité via une filtration sur berge (RBF pour riverbank filtration). Les modifications des écoulements causées par les prélèvements dans un puits à drains rayonnants ont été simulées en vue d’estimer la part des eaux de surface drainées sur un site de RBF sur la rivière Nakdong en Corée du Sud. La structure des drains horizontaux crépinés d’un puits à drains rayonnants a été étudiée par rapport à la filtration effective à travers les berges. Le rapport des eaux de surface drainées vers le puits à drains rayonnants sur le total des eaux souterraines pompées a été estimé entre 27 et 52%. La quantité d’eau de surface incorporée varie avec la distance du drain horizontal à la rivière, ce qui montre que la position et la structure du puits sont importantes pour la RBF. Pour chacune des simulations, le rabattement maximum du niveau des eaux souterraines à proximité du puits était de 2.1 m, valeur peu significative au regard du très grand débit de pompage sur le site étudié. Il en a été conclu que les puits à drains rayonnants associés à de la RBF pouvaient être durablement utilisés sur ce site pour l’alimentation en eau.Se usó un pozo colector radial para la extracción de una gran cantidad de agua subterránea sin causar un descenso profundo en el pozo del centro, y es apropiado porque el abastecimiento de agua municipal a través de la filtración de la margen del río (RBF). Se simularon los cambios en la trayectoria de flujo causados por la extracción de agua a través de un pozo colector radial para estimar la cantidad de la inducción del agua del río en un sitio RBF asociado con el Río Nakdong en Corea del Sur. Se examinó las estructuras de los drenes horizontales de un pozo colector radial con respecto a la filtración efectiva de la margen del río. El cociente relativo del agua del río inducida por el pozo colector radial comparado con el total de la extracción de agua subterránea se estimó en 27–52%. La cantidad de agua del río inducida varía con la distancia del dren horizontal a partir del río, indicando que la ubicación y estructura del pozo colector es significativa para el RBF. En todos los casos de simulación, el descenso máximo del nivel de agua subterránea próxima al pozo colector fue 2.1 m, lo cual no es significativo considerando el ritmo sustancial de bombeo en el sitio de estudio. Se concluyó que los pozos colectores radiales RBF pueden ser usados en el sitio de estudio para un abastecimiento de agua sustentable.放射性集水井可用于抽取大量地下水而不会在井中心引起大降深,适用于傍河取水(RBF)的市政供水。通过对放射性集水井中抽水引起的流程变化的模拟估计韩国Nakdong 河RBF点诱发的河水补给量。针对有效河堤过滤对放射性集水井筛过的水平通道结构进行检查。河水诱发补给放射性集水井的相对于完全地下水开采的相对比估计为27–52%。诱发河水量随着水平通道与河的距离变化,表明集水井的位置和结构对RBF而言非常重要。在所有的模拟情景下,靠近集水井的地下水位的最大降深为2.1m,若考虑到研究区较大的抽水速率,并不显著。因此结论为RBF放射性集水井可用于研究区的持续供水。Um poço coletor radial é utilizado para a extração de uma grande quantidade de água subterrânea sem causar um rebaixamento profundo no centro do poço, e é apropriado para o abastecimento municipal de água através de bancos filtrantes na margem do rio (Riverbank Filtration, RBF). Simularam-se as alterações nas direções de escoamento devido à extração de água a partir de um poço coletor radial para estimar a quantidade de indução de água do rio num local de RBF associado ao Rio Nakdong, na Coreia do Sul. Examinou-se a estrutura dos drenos horizontais ranhurados de um poço coletor radial em relação à filtragem efetiva da margem do rio. A razão relativa da água do rio induzida para o poço coletor radial comparada com a extração total foi estimada em 27-52%. A quantidade de água do rio induzida varia com a distância de um dreno horizontal ao rio, o que indica que a localização e a estrutura do poço coletor é significativa para a RBF. Em todos os casos simulados, o rebaixamento máximo do nível de águas subterrâneas junto ao poço coletor foi de 2.1 m, o que não é significativo, considerando o caudal substancial de bombagem no local de estudo. Concluiu-se que os poços coletores radiais RBF podem ser utilizados no local de estudo para um abastecimento de água sustentável.
Starting Page	575
Ending Page	589
Page Count	15
File Format	PDF
ISSN	14312174
Journal	Hydrogeology Journal
Volume Number	20
Issue Number	3
e-ISSN	14350157
Language	Portuguese
Publisher	Springer-Verlag
Publisher Date	2012-01-05
Publisher Institution	International Association of Hydrogeologists
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Groundwater/surface-water relations Riverbank filtration Radial collector well Numerical modeling South Korea Hydrogeology Waste Water Technology Water Pollution Control Water Management Aquatic Pollution Geology
Content Type	Text
Resource Type	Article
Subject	Earth and Planetary Sciences Water Science and Technology

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