BLACKSBURG, VA. — The assumption, held for over half a century, that purely vertical strain used in the definition of the storage coefficient in aquifers is not valid, a study at Virginia Tech shows. Since the analytical work of Theis and Jacob over half a century ago, scientists have used only vertical strain to measure storage in aquifers, ignoring what is going on in the horizontal direction, said Thomas J. Burbey of Virginia Tech's Department of Geological Sciences in the College of Arts and Sciences. Water is released from aquifers in two ways, Burbey said—through aquifer compression or compaction and through the release of pressure that allows the water to expand, much as air expands in a tire when the valve is released.
The above story is based on materials provided by Virginia Tech. Note: Materials may be edited for content and length.
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