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Urbanization and the groundwater budget, metropolitan Seoul area, Korea

The city of Seoul is home to more than 10million people in an area of 605km super(2). Groundwater is abstracted for public water supply and industrial use, and to drain underground facilities and construction sites. Though most tap water is supplied from the Han River, the quantity and quality of gr...

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Bibliographic Details
Published in:Hydrogeology journal 2001-08, Vol.9 (4), p.401-412
Main Authors: Kim, Yoon-Young, Lee, Kang-Kun, Sung, Ig
Format: Article
Language:English
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Summary:The city of Seoul is home to more than 10million people in an area of 605km super(2). Groundwater is abstracted for public water supply and industrial use, and to drain underground facilities and construction sites. Though most tap water is supplied from the Han River, the quantity and quality of groundwater is of great concern to Seoul's citizens, because the use of groundwater for drinking water is continuously increasing. This study identifies the major factors affecting the urban water budget and quality of groundwater in the Seoul area and estimates the urban water budget. These factors include leakage from the municipal water-supply system and sewer systems, precipitation infiltration, water-level fluctuations of the Han River, the subway pumping system, and domestic pumping. The balance between groundwater recharge and discharge is near equilibrium. However, the quality of groundwater and ability to control contaminant fluxes are impeded by sewage infiltration, abandoned landfills, waste dumps, and abandoned wells.Original Abstract: La ville de Seoul possede une population de plus de 10millions d'habitants, pour une superficie de 605km super(2). Les eaux souterraines sont pompees pour l'eau potable et pour les usages industriels, ainsi que pour drainer les equipements souterrains et les sites en construction. Bien que l'essentiel de l'eau potable provienne de la riviere Han, la quantite et la qualite de l'eau souterraine presentent un grand interet pour les habitants de Seoul, parce qu'on utilise de plus en plus l'eau souterraine pour l'eau potable. Cette etude identifie les facteurs principaux qui affectent la qualite de l'eau souterraine dans la region de Seoul et fait l'estimation du bilan d'eau urbaine. Les principaux facteurs affectant le bilan d'eau urbaine et la qualite de l'eau souterraine sont les fuites du reseau d'adduction et du reseau d'egouts, l'infiltration des eaux de precipitation, les fluctuations du niveau de la riviere Han, le reseau de pompage du metro et les pompages prives. Le bilan entre la recharge de la nappe et sa decharge est proche de l'equilibre. Cependant, les infiltrations d'eaux usees, les decharges abandonnees, les decharges d'ordures et les puits abandonnes portent atteinte a la qualite de l'eau souterraine et a la capacite de controler les flux de contaminants.
ISSN:1431-2174
1435-0157
DOI:10.1007/s100400100139