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Formulating surrogate pumping test data sets to assess aquifer hydraulic conductivity
A hypothesis to estimate hydraulic conductivity from surrogate pumping tests formulated using routinely monitored pumping rates and hydraulic heads is tested. The data set of a surrogate pumping test contains only a few late-time drawdowns represented by changes in heads at selected monitoring wells in responses to changes in pumping rate at an extraction well. The surrogate pumping test can be analyzed using a simple analytical model to estimate hydraulic conductivity. Compared with conventional aquifer testing methods such as short-term pumping and slug tests, the method offers the following advantages: (1) it permits estimation of hydraulic conductivity using fewer data points; (2) it is unaffected by the potentially altered, near-well conditions that often affect slug tests; and (3) it offers cost and schedule savings by eliminating field work. The method was applied at a project site, yielding hydraulic conductivity values more than an order of magnitude higher than those derived from slug tests, and comparable to values derived from a standard 24-h pumping test. Keywords: Surrogate, Aquifer testing, Hydraulic conductivity, Permeability, Pumping test, Slug test
Formulating surrogate pumping test data sets to assess aquifer hydraulic conductivity
A hypothesis to estimate hydraulic conductivity from surrogate pumping tests formulated using routinely monitored pumping rates and hydraulic heads is tested. The data set of a surrogate pumping test contains only a few late-time drawdowns represented by changes in heads at selected monitoring wells in responses to changes in pumping rate at an extraction well. The surrogate pumping test can be analyzed using a simple analytical model to estimate hydraulic conductivity. Compared with conventional aquifer testing methods such as short-term pumping and slug tests, the method offers the following advantages: (1) it permits estimation of hydraulic conductivity using fewer data points; (2) it is unaffected by the potentially altered, near-well conditions that often affect slug tests; and (3) it offers cost and schedule savings by eliminating field work. The method was applied at a project site, yielding hydraulic conductivity values more than an order of magnitude higher than those derived from slug tests, and comparable to values derived from a standard 24-h pumping test. Keywords: Surrogate, Aquifer testing, Hydraulic conductivity, Permeability, Pumping test, Slug test
Formulating surrogate pumping test data sets to assess aquifer hydraulic conductivity
Kerang Sun (author)
2018
Article (Journal)
Electronic Resource
Unknown
Metadata by DOAJ is licensed under CC BY-SA 1.0
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