GROUNDWATER GEOPHYSICS
Groundwater Exploration & Exploitation
Introduction:
Geophysics and Geology, in the past few years, has reached a place of
vital importance for the scientific development and protection of the
world's precious groundwater supply. Geophysical investigations of the
buried strata can be made either from the land surface or in a drilled
hole in formation.
Selection of Site using ELECTRICAL RESISTIVITY SURVEY:
We
select the site for both borewell and dugwell purely based on the
principles of "Geophysical Investigation" using Electrical Resistivity
Meter. Exploration for groundwater involves the investigation of areas for
the proper location of wells. Electrical Resistivity investigation offer the most
useful aid in locating groundwater resource and groundwater quality. The
depth of water table can also be determined from resistivity
soundings.Resistivity Survey is used mainly to determine the subsoil
lithology and to assess the potential of groundwater in the area being
investigated. The Investigation will also provide us with probable depth
at which water is available to drill accordingly.
We at AQUA-PMP
Research Foundation conduct Surveys employing the latest Scientific
methods to explore, evaluate, extract and manage groundwater. With vast and
extensive experience in this field our investigation has proved highly
successful with many Private, Public, Multinational and also Residential
Projects.
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Drilling of Borewell by Hand Augur, Calyx, Rotary and DTH.
Hand Augur suitable for sandy and
highly loose formation with probable occurrence in coastal areas where
quality of water can be monitored while drilling and representative soil
as well as water sample can be obtained to construct effective borewells
and tube wells.
Calyx drills are used in sedimentary and clayey formation occurring mostly
in river Alluvium or river banks. To develop a large diameter tube wells
with gravel /graded pebble packing.
Rotary and DTH: (Down the hole Hammer) Suitable for
highly compact sedimentary strata consisting of clay, compact
clay, limestone, sandstone and common Gondowana sedimentary rocks up to a
dept of 1300 ft. DTH drilling is adopted for drilling through weathered
medium and massive hard rock formation rapidly up to 500ft
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Drilling in Hard Rock
up to 500' and
Sedimentary and soil up to 1300'
Borewell can be drilled inside the open well with a diameter of 4.5 inch
and 6.5 inches in rocky strata up to a depth of 300ft.
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Conducting yield test
of borewells
We can determine the quantity of water that can be extracted in a day from a borewell
using air compressor, V Notch, over pumping with barrel and stop watch
and step drawn down methods.
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Flushing and cleaning of
borewells with Air compressors
Existing borewells both Active and
defunct can be revived / rejenavated using high pressure air
compressors and
also
by chemical treatment to the pores and slots of
borewells
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Selection supply and
installation of pump
Suitable pumping equipment can be selected based on the hydraulic particulars
derived on conducting yield test to save power and to give optimum efficiency
of the system.
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Chemical Analysis of
Water
We have got a latest well equipped laboratory with highly skilled and
technically qualified chemist to analyze any type of water for domestic,
industrial and construction purposes. Below is the table which shows the
parameters of Drinking Water.
