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An overview of the effects of urbanization on the quantity and quality of groundwater in South Asian megacities

机译：城市化对南亚大城市地下水数量和质量的影响概述

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摘要

One of the challenges facing megacities in South Asian developing countries in their attempts to realize so-called urban rejuvenation is groundwater conditioned by canal seepage and immense sewage loads. To understand the connection between groundwater pollutants and urbanization, numerous studies were reviewed, and data obtained from a variety of national and international organizations were analyzed. In Delhi and Dhaka, urbanization has lowered the groundwater level as a result of severe overextraction, and its dense population makes Delhi particularly vulnerable to groundwater pollution. In the coastal areas of Karachi and Mumbai, such pollution is magnified by the proximity of seawater as well as the increasing populations of these areas. Among the groundwater pollutants associated with urbanization, chlorides and nitrates are the chief anthropogenic toxins; thus, they are examined in this study. This paper concludes with policy recommendations for minimizing the impact of urbanization on groundwater.
机译：为了实现所谓的城市复兴，南亚发展中国家大城市所面临的挑战之一是地下水的渗流和巨大的污水负荷。为了了解地下水污染物与城市化之间的联系，对许多研究进行了回顾，并对从各种国家和国际组织获得的数据进行了分析。在德里和达卡，严重的过度开采导致城市化进程降低了地下水位，其人口稠密使德里特别容易受到地下水污染的影响。在卡拉奇和孟买的沿海地区，由于海水的临近以及这些地区人口的增加，这种污染更加严重。在与城市化有关的地下水污染物中，氯化物和硝酸盐是主要的人为毒素。因此，在本研究中对其进行了检查。本文最后提出了一些政策建议，以尽量减少城市化对地下水的影响。

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