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Module 7 Ground Water Geology and Groundwater Geophysics
SUBJECT : Geology
AUTHOR : Maruthesha Reddy MT
PUBLISHED ON : 18/10/17
NUMBER OF PAGES : ( 22 Pages)
PRICE : Rs 12.1

Hydrogeology forms the basis for scientific source finding and evaluation of sustained productivity of subsurface reservoirs. Shallow wells and Deep wells: Shallow well, which is dug up to the first water bearing strata. Diameter is 2.5 m to 5 m. Deep wells which are dug up to the second water bearing strata. Diameter is 25 cms to 50 cms. Spacing of wells is roughly estimated to be around 200300 m in alluvial areas and around 75150 m in hard rocks. Hydro geological applications are In identifying the source points for ground water supplies. Estimation of ground water reserves mineral prospecting and mining. Tackling problems related to pollution. Evaluation of site for Geotechnical constructions. Hydrology encompasses several disciplines. An interdisciplinary approach is after the best course for the achievement of satisfactory results from investigation. Aquifers are pertaining to a sub surface water reservoir. T = K.H where. T = Transmissibility, K = coefficient of permeability, H = thickness of the aquifer. Resistivity meter is the instrument used for Ground water survey. T = h .e where T = Transverse resistance, e=resistivity of the aquifer. S = h/e where S = Longitudinal conductance Among various electrode configurations Wenner and Schlumberger configurations are widely used. There are several advantages in using Schlumberger configuration over Wenner configuration.

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