The storativity of an elastic artesian aquifer is 0.05. If the porosity of the aquifer is
0.30, the compressibility of water (β) at 20 ◦C is 4.58∙10−10, and the thickness of the
aquifer is 10 m, what is the compressibility (βp) of the aquifer matrix? Is this aquifer
likely to undergo compaction if the hydrostatic pressure in the aquifer were to be
decreased?
Answers
Answer:
Aquifer tests (pumping tests, slug tests and constant-head tests) are performed to estimate site-specific values for the hydraulic properties of aquifers and aquitards. Under certain circumstances, however, site-specific hydraulic property data may not be available when needed. For example, reconnaissance studies or scoping calculations may require hydraulic property values before on-site investigations are performed.
The following sections present representative hydraulic property values reported in the literature for horizontal and vertical hydraulic conductivity, storativity, specific yield and porosity. Refer to these values if site-specific data are unavailable for your study or to check the results of field and laboratory tests conducted at an investigation site.
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