首页|Refining aquifer heterogeneity and understanding groundwater recharge sources in an intensively exploited agrarian dominated region of the Ganga Plain

Refining aquifer heterogeneity and understanding groundwater recharge sources in an intensively exploited agrarian dominated region of the Ganga Plain

扫码查看
原文链接
  • NETL
  • NSTL
  • 万方数据
Densely populated region of Ganga Plain is facing aquifer vulnerability through waterborne pollutants and groundwater stress due to indiscriminate abstraction,causing environmental and socio-economic instabilities.To address long-term groundwater resilience,it is crucial to understand aquifer heterogene-ity and connectivity,groundwater recharge sources,effects of groundwater abstraction etc.In this con-text,present study aims to understand factors responsible for vertical and spatial variability of groundwater chemistry and to identify groundwater recharge sources in an intensively exploited agrar-ian region of the Ganga Plain.Interpretation of chemometric,statistical,and isotopic analysis categorises the alluvial aquifer into zone 1(G1;ground surface to 100 m)and zone 2(G2;＞100 m-210 m).The group G1 samples are char-acterized by a wide variation in hydrochemical species,noted with pockets of F-and NO3-rich groundwa-ter,and fresh to more evolved water types,while group G2 groundwater is characterized by a sharp increase in freshwater types and limited variation in their isotopic and hydrochemical species.The G1 groundwater chemistry is governed by soil mineralogy,local anthropogenic inputs(SO42-,Cl-,and NO3-),and manifested by multiple recharge sources(local precipitation,river,canal water,pond).The G2 group is dominated by geogenic processes and mainly recharged by the local precipitation.Geospatial signatures confirm more evolved water type for group G1 in northwestern region,while fresh-water type covers the rest of the study area.Fluoride rich groundwater is attributed to sodic water under alkaline conditions and enriched δ18O values emphasizing role of evaporation in F-mobilization from micas and amphiboles abundant in the soil.The findings provide insight into potential groundwater vul-nerability towards inorganic contaminants,and ground water recharge sources.The outcome of this study will help to develop aquifer resilience towards indiscriminate groundwater extraction for agricultural practices and aim towards sustainable management strategies in a similar hydrogeological setting.

Stable isotopesHydrogeochemical attributesGroundwater recharge sourcesGanga Plain

Abhinav Patel、Shive Prakash Rai、Nijesh Puthiyottil、Abhinesh Kumar Singh、Jacob Noble、Rajesh Singh、Dharmappa Hagare、U.D.Saravana Kumar、Nachiketa Rai、Kossitse Venyo Akpataku

展开 >

Department of Geology,Institute of Science,Banaras Hindu University,Varanasi,Uttar Pradesh 221005,India

Isotope and Radiation Application Division,Bhabha Atomic Research Centre,Trombay,Mumbai 400085,India

Environmental Hydrology Division,National Institute of Hydrology,Roorkee,Uttarakhand 247667,India

School of Engineering,Design and Built Environment,Western Sydney University,Australia

Isotope Hydrology Section,Division of Physical and Chemical Sciences,International Atomic Energy Agency(IAEA),Vienna,Austria

Department of Earth Sciences,Indian Institute of Technology,Roorkee,Uttarakhand 247667,India

Laboratory of Organic Chemistry and Environmental Science,Department of Chemistry,University of Kara,PO Box 404,Kara,Togo

展开 >

Banaras Hindu University for the financial assistance granted through the Institute of EminenceBanaras Hindu University for the financial assistance granted through the Institute of EminenceHead,Department of Geology,B.H.U.,VaranasiUGC-CSIR for the fellowship(JRF,SRF)National Institute of Hydrology,Roorkee

IoEDev Scheme 603116-9 June 2018/2019

2024

10.1016/j.gsf.2024.101808

地学前缘(英文版)
中国地质大学（北京） 北京大学

地学前缘(英文版)

CSTPCD
影响因子：0.576
ISSN：1674-9871
年,卷(期)：2024.15(4)
  • 75