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The analytical results of step-drawdown test data from the study area in Bengal suggest that most test wells were not properly developed with adequate pumping prior to the test and that a significant amount of well development took place during the test exercise. The aquifer loss factor (B1) ranges from a maximum of 19.3 sec/ft2 for Nabinagar to a minimum of 7.0 sec/ft2 for Chandina. The well loss factor (C1) does not indicate any major abnormality and ranges from a maximum of 1.49 sec2/ft5 for Nabinagar to a minimum of 0.96 sec2/ft5 for Laksam and is supported by the minimal differences between the measured and the calculated drawdown values. Highly efficient well conditions are obtained for all the test wells. The unrealistic step-drawdown test procedures and poor prior development of wells have considerable influence on the dissimilar transmissivity values calculated from step-drawdown test data.
The analytical results of step-drawdown test data from the study area in Bengal suggest that most test wells were not properly developed with adequate pumping prior to the test and that a significant amount of well development took place during the test exercise. The aquifer loss factor (B1) ranges from a maximum of 19.3 sec/ft2 for Nabinagar to a minimum of 7.0 sec/ft2 for Chandina. The well loss factor (C1) does not indicate any major abnormality and ranges from a maximum of 1.49 sec2/ft5 for Nabinagar to a minimum of 0.96 sec2/ft5 for Laksam and is supported by the minimal differences between the measured and the calculated drawdown values. Highly efficient well conditions are obtained for all the test wells. The unrealistic step-drawdown test procedures and poor prior development of wells have considerable influence on the dissimilar transmissivity values calculated from step-drawdown test data.
Step-drawdown tests
Alam, Sheikh M. M. (author)
International Journal of Water Resources Development ; 7 ; 259-266
1991-12-01
8 pages
Article (Journal)
Electronic Resource
English
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