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首页> 外文期刊>Journal of Environmental Management >Quantifying the dynamics of sub-daily to seasonal hydrological interactions of Ganges river with groundwater in a densely populated city: Implications to vulnerability of drinking water sources
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Quantifying the dynamics of sub-daily to seasonal hydrological interactions of Ganges river with groundwater in a densely populated city: Implications to vulnerability of drinking water sources

机译：在一个密集的城市中，对地下水进行地下水的船舶河流季节水文互动的动态：对饮用水源的脆弱性的影响

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摘要

Groundwater resources in South Asian cities are facing immense stress due to over-extraction leading to environmental, social and economic instabilities. The perennial mega rivers of Himalayas form the lifeline for South Asia, underpinning food and water security for a large population both directly and indirectly through exchange with groundwater systems. The present study delineates the spatio-temporal variation in patterns and processes of sub-hourly to annual-scale hydrological exchanges between the Ganges and its adjoining highly exploited aquifer in a urban-peri urban reach. Multivariate statistical analyses established river water-groundwater interaction in this region with ～40% loading of first principal component, i.e river water during monsoon on the shallow aquifer. The part of the aquifer detached from the main confined aquifer show an influence of precipitation (the second principal component) with loading of ～90%. Again the part of the aquifer suffering infiltration of local surface water bodies show effect of precipitation with a second principal loading of ～80%. Fourier transformation is used in the hydrograph to remove influence of heavy urbanization on the hydrographs. This study proves that the phenomenon of infiltrating river water during monsoon plays a primary role in controlling aquifer storage although contaminating the aquifer simultaneously. However, during pre and post-monsoon the flow path reversal helps in maintaining river baseflow. Cross-correlation between the river and piezometric series show increased delay of pressure head propagation of the infiltrating river waterfront, with increasing distance. These observations are also substantiated by stable isotope signatures. The present study provides an understanding of potential groundwater vulnerability resulting from waste water and irrigational contamination through river water intrusion which would eventually lead the government to implement proper water and environmental management policies towards availability of long-term sustainable water resources for the residents.
机译：由于环境，社会和经济不稳定，南亚城市的地下水资源面临着巨大的压力。喜马拉雅的多年生巨型河流形成南亚的生命线，通过与地下水系统的交换直接和间接地展开南亚的生命线。本研究阐述了亚小时对恒河和毗邻城市城市达到的恒河和其相邻的高度被剥削的含水层的年度水文交换的模式和过程的时空变化。多元统计分析在该地区建立了河水地下水互动，浅〜40％的第一主成分，I.E河水在浅层含水层上。从主要受限含水层中脱离的含水层的一部分显示沉淀（第二主成分）的影响，载荷〜90％。再次患有局部表面水体浸润的含水层的一部分显示沉淀的效果，第二个主要负载量〜80％。傅里叶变换用于水文编程，消除重型城市化对水文的影响。本研究证明了季风期间渗透河水的现象在控制含水层储存时发挥着主要作用，尽管同时污染含水层。然而，在季风先前和季风期间，流动路径逆转有助于维持河流溢流。河流和压电序列之间的互相关显示距离速度渗透河滨水的延迟延迟，距离增加。这些观察结果也通过稳定的同位素签名来证实。本研究提供了通过河水入侵所产生的废水和灌溉污染导致的潜在地下水脆弱性，最终导致政府实施适当的水和环境管理政策，以便为居民提供长期可持续水资源的可用性。

著录项

  • 来源
    《Journal of Environmental Management》 |2021年第15期|112384.1-112384.11|共11页
  • 作者

    Prerona Das; Abhijit Mukherjee; Dan J. Lapworth; Kousik Das; Sumitro Bhaumik; Mrinal K. Layek; Ashok Shaw; Martin Smith; Probal Sengupta; Alan M. MacDonald; Joy Sen;

  • 作者单位

    Department of Geology and Geophysics Indian Institute of Technology Kharagpur 721 302 India;

    Department of Geology and Geophysics Indian Institute of Technology Kharagpur 721 302 India School of Environmental Science and Engineering Indian Institute of Technology Kharagpur 721 302 India Applied Policy Advisory to Hydrogeosciences Group Indian Institute of Technology Kharagpur 721302 India;

    British Geological Survey Maclean Building Wallingford OX10 8BB UK;

    School of Environmental Science and Engineering Indian Institute of Technology Kharagpur 721 302 India;

    Department of Computer Science and Engineering Indian Institute of Technology Kharagpur 721 302 India;

    Department of Geology and Geophysics Indian Institute of Technology Kharagpur 721 302 India;

    Department of Geology and Geophysics Indian Institute of Technology Kharagpur 721 302 India;

    British Geological Survey Murchison House West Mains Road Edinburgh EH9 3LA UK;

    Department of Geology and Geophysics Indian Institute of Technology Kharagpur 721 302 India;

    British Geological Survey Murchison House West Mains Road Edinburgh EH9 3LA UK;

    Department of Architecture and Regional Planning Institute of Technology Kharagpur 721 302 India;

  • 收录信息 美国《科学引文索引》(SCI);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Fourier transform; Hydrological interaction; Piezometry; Stable isotope; Statistical analysis; Vulnerability;

    机译：傅里叶变换;水文相互作用;压力测量;稳定同位素;统计分析;漏洞;

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