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Electrical resistivity tomography for assessment of groundwater salinity in west Delhi, India

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Title Electrical resistivity tomography for assessment of groundwater salinity in west Delhi, India
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Creator Partha Pratim Adhikary
H. Chandrasekharan
S. K. Dubey
S. M. Trivedi
Ch. Jyotiprava Dash
 
Subject Resistivity tomography . Groundwater salinity . Delhi . Hydrochemistry
 
Description Not Available
Indiscriminate use of agro-chemicals for intensive
agriculture is mainly responsible for deterioration of groundwater
quality in west Delhi of India. Geophysical and
hydrochemical investigations were carried out to decipher
subsurface geologic formation and assess groundwater salinity.
Electrical resistivity tomography surveys revealed the
presence of potential groundwater zones at 20–30 m below
ground level. The groundwater quality was moderate to poor
as evidenced from the low resistivity value of the potential
aquifer. Only 20.2 % of the study area showed good quality
groundwater potentiality, situated at few pockets in eastern,
western, and northern parts of the study area. Low resistivity
formation at southern part of the study area was due to
infiltration of highly polluted drain water along with fertilizer
rich surface water to the aquifer. Hydrochemical investigation
also confirmed the result. The average electrical conductivity
of groundwater was around 5,950 μS cm−1. Longitudinal unit
conductance and transverse unit resistance values were calculated
and used for delineation of saline groundwater zones. A
direct relationship between longitudinal unit conductance and
groundwater salinity made it possible to develop empirical
equations by which salinity can be predicted from computed
longitudinal unit conductance value. It helps for periodic
monitoring of the pollution level by spending less labour
and money and benefits immensely the policy makers. The
article suggests further study and research work that can lead
to sustainable exploitation/use and management of groundwater
resources in west Delhi.
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Date 2020-03-17T09:01:15Z
2020-03-17T09:01:15Z
2014-03-31
 
Type Research Paper
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/33899
 
Language English
 
Relation Not Available;
 
Publisher Not Available