Authors :
S. Sundaramoorthy; Dr. N. Jawahar Raj; Dr. S. Selva Raj; R. Karpagambal; M. Kavinraj
Volume/Issue :
Volume 7 - 2022, Issue 11 - November
Google Scholar :
https://bit.ly/3IIfn9N
Scribd :
https://bit.ly/3tQuPLL
DOI :
https://doi.org/10.5281/zenodo.7338705
Abstract :
An Integrated geophysical approach
i.emagnetic impedance(lps1200) and Audio magneto
telluric(ADMT 300s) survey was carried out in hard
rock area of Pathalapattai village, Thiruverambur Block
in Tiruchirappalli District of Tamil Nadu State, India,
for delineation of groundwater-bearing zones that would
be feasible for drilling deep bore wells for tapping good
quantum of water. Groundwater movement that moves
through fractures in hard rocks,can be delineated
byintegrated geophysical surveys. A detailed survey of
the area was done using a LPS1200 instrument to target
fractured zones by magnetic impedance variation and
favorable locations were selected for further study using
ADMT 300s (2D Audio Magneto Telluric Scanner).
Hence, the entire area (1 acre of land) was surveyed and
only two places was the favorable where the magnetic
impedance difference was encouraging. Those
anomalous areas were scanned by 2D Audio magneto
telluric scanner up to the depth of 300m. The technique
has provided information on the subsurface lithology &
structures up to 300 m depth. The study shows that the
groundwater occurrence in the area is confined to
fractured and weathered zones. One of the location was
recommended to drill a bore well. Comparing and
correlating these results with the drilling data, it is found
to be good. It can be concluded that the established
interpretation of 2D Audio Magneto Telluric data and
LPS 1200 data pretty well correlates with the actual
fracture depth and lithological conditions. Thus, the
method not only aids in locating water aquifers but also
helps to avoid bore hole failures
Keywords :
Hydrogeology; Geophysical survey, Magneto telluric, water well drilling, Ground water surevy.
An Integrated geophysical approach
i.emagnetic impedance(lps1200) and Audio magneto
telluric(ADMT 300s) survey was carried out in hard
rock area of Pathalapattai village, Thiruverambur Block
in Tiruchirappalli District of Tamil Nadu State, India,
for delineation of groundwater-bearing zones that would
be feasible for drilling deep bore wells for tapping good
quantum of water. Groundwater movement that moves
through fractures in hard rocks,can be delineated
byintegrated geophysical surveys. A detailed survey of
the area was done using a LPS1200 instrument to target
fractured zones by magnetic impedance variation and
favorable locations were selected for further study using
ADMT 300s (2D Audio Magneto Telluric Scanner).
Hence, the entire area (1 acre of land) was surveyed and
only two places was the favorable where the magnetic
impedance difference was encouraging. Those
anomalous areas were scanned by 2D Audio magneto
telluric scanner up to the depth of 300m. The technique
has provided information on the subsurface lithology &
structures up to 300 m depth. The study shows that the
groundwater occurrence in the area is confined to
fractured and weathered zones. One of the location was
recommended to drill a bore well. Comparing and
correlating these results with the drilling data, it is found
to be good. It can be concluded that the established
interpretation of 2D Audio Magneto Telluric data and
LPS 1200 data pretty well correlates with the actual
fracture depth and lithological conditions. Thus, the
method not only aids in locating water aquifers but also
helps to avoid bore hole failures
Keywords :
Hydrogeology; Geophysical survey, Magneto telluric, water well drilling, Ground water surevy.
