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initial version
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recommending abstraction rate for a borehole after test pumping
After completing all the tests for borehole test pumping i.e calibration test, step drawdown test, constant rate test,recovery test i got Transmissivity and storativity from the analysis graphs, last thing now is getting abstraction rate that will last for 10 yrs.
My inquiry is: How do u calculate the abstraction rate from T or S or from the available drawdown of the borehole and the rates that have been used. eg for this particular borehole, the following rates have been used;20, 30, 40, 50 and 60m3/hr in the Step drawdown test and constant rate Q of 45m3/hr . Available drawdown is 16.07m. Transmissivity is 29m2/day and storativity of 0.06378. The aquifer is leaky confined. This is a production borehole.
Thank you
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No.2 Revision
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recommending
Recommended
abstraction rate for a borehole after test
pumping
pumping?
After completing all the tests for borehole test pumping [1], [2] i.e calibration test, step drawdown test, constant rate test,recovery test i got Transmissivity and storativity from the analysis graphs, last thing now is getting abstraction rate that will last for 10 yrs.
My inquiry is: How do
u
you
calculate the abstraction rate from T or S or from the available drawdown of the borehole and the
rates that have been used. eg for this particular borehole, the following rates have been
used;20,
used; 20,
30, 40, 50 and 60m3/hr in the Step drawdown test and constant rate Q of
45m3/hr .
45m3/hr.
Available drawdown is 16.07m. Transmissivity is 29m2/day and storativity of 0.06378. The aquifer
is leaky confined. This is a production borehole.
Thank you
[1] https://archive.knowledgepoint.org/en/questions/3779/where-does-one-put-a-pump-when-doing-test-pumping-of-water-well/ and
[2] https://archive.knowledgepoint.org/en/questions/4062/effects-of-atmospheric-pressure-changes-in-test-pumping-of-boreholes/
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3 |
retagged
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Recommended abstraction rate for a borehole after test pumping?
After completing all the tests for borehole test pumping [1], [2] i.e calibration test, step drawdown test, constant rate test,recovery test i got Transmissivity and storativity from the analysis graphs, last thing now is getting abstraction rate that will last for 10 yrs.
My inquiry is: How do you calculate the abstraction rate from T or S or from the available drawdown of the borehole and the rates that have been used. eg for this particular borehole, the following rates have been used; 20, 30, 40, 50 and 60m3/hr in the Step drawdown test and constant rate Q of 45m3/hr. Available drawdown is 16.07m. Transmissivity is 29m2/day and storativity of 0.06378. The aquifer is leaky confined. This is a production borehole.
Thank you
[1] https://archive.knowledgepoint.org/en/questions/3779/where-does-one-put-a-pump-when-doing-test-pumping-of-water-well/ and
[2] https://archive.knowledgepoint.org/en/questions/4062/effects-of-atmospheric-pressure-changes-in-test-pumping-of-boreholes/
