Laboratory simulation of the effects of overburden stress on the specific storage of shallow artesian aquifers

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Edited by: J.H. KrishnaVicente Quinones-AponteFernando Gomez-Gomez, and G.L. Morris


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A laboratory experiment to measure the specific storage of an aquifer material was conducted. A known dead load, simulating an overburden load, was applied to a sample of completely saturated aquifer material contained inside a cylinder. After the dead load was applied, water was withdrawn from the sample, causing the hydrostatic pressure to decrease and the effective stress to increase. The resulting compression of the sample and the amount of water withdrawn were measured after equilibrium was reached. The procedure was repeated by increasing the dead load and the hydrostatic pressure followed by withdrawing water to determine new values of effective stress and compaction. The simulated dead loads are typical of those experienced by shallow artesian aquifers. The void ratio and the effective stress of the aquifer sample, as simulated by different dead loads, determine the pore volume compressibility which, in turn, determines the values of specific storage. An analytical algorithm was used to independently determine the stress dependent profile of specific storage. These values are found to be in close agreement with laboratory results. Implications for shallow artesian aquifers, with relatively small overburden stress, are also addressed.

Publication type Conference Paper
Publication Subtype Conference Paper
Title Laboratory simulation of the effects of overburden stress on the specific storage of shallow artesian aquifers
Year Published 1990
Language English
Publisher American Water Resources Association
Publisher location Bethesda, MD
Contributing office(s) Caribbean Water Science Center
Description 8 p.
Larger Work Type Conference Paper
Larger Work Subtype Conference Paper
Larger Work Title Tropical Hydrology and Caribbean Water Resources, Proceedings of the International Symposium on Tropical Hydrology
First page 349
Last page 356
Conference Title International Symposium on Tropical Hydrology
Conference Location San Juan, Puerto Rico
Conference Date July 23-27, 1990
Online Only (Y/N) N
Additional Online Files (Y/N) N
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