Journal of Geological Society of India (Online archive from Vol 1 to Vol 78)

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Design of Dug Wells in Hard Rock Areas, Case Study in Karnataka State


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1 Agricultural Refinance and Development Corporation, Dr. Annie Besant Road, Worli, Bombay 400018, India
     

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The average transmissivity value arrived at from analyses of pump test data for granitic rocks is 27.32 m2/d and basalts is 49.68 m2/d. The designed specific capacity in order to get an annual draft of 12000 m3 is 561pm/metre drawdown. An optimum diameter of wells in granitic and basaltic rocks for an annual draft of 12000m3 are 8.6 and 6.0m respectively with 2 m of saturated material. These are true only for wells located in groundwater worthy areas of significant transmissivity values.
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  • Design of Dug Wells in Hard Rock Areas, Case Study in Karnataka State

Abstract Views: 194  |  PDF Views: 3

Authors

S. K. Sharma
Agricultural Refinance and Development Corporation, Dr. Annie Besant Road, Worli, Bombay 400018, India
A. N. Seetharam
Agricultural Refinance and Development Corporation, Dr. Annie Besant Road, Worli, Bombay 400018, India

Abstract


The average transmissivity value arrived at from analyses of pump test data for granitic rocks is 27.32 m2/d and basalts is 49.68 m2/d. The designed specific capacity in order to get an annual draft of 12000 m3 is 561pm/metre drawdown. An optimum diameter of wells in granitic and basaltic rocks for an annual draft of 12000m3 are 8.6 and 6.0m respectively with 2 m of saturated material. These are true only for wells located in groundwater worthy areas of significant transmissivity values.