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Science 23 April 1965:
Vol. 148. no. 3669, pp. 494 - 495
DOI: 10.1126/science.148.3669.494
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Articles

Radiocarbon Determinations for Estimating Groundwater Flow Velocities in Central Florida

Bruce B. Hanshaw 1, William Back 1, and Meyer Rubin 1

1 U.S. Geological Survey, Washington, D.C. 20242

Carbon-14 activity was determined from HCO3- in samples of groundwater obtained from the principal artesian aquifer in Florida. From these data the "age" of water obtained from a series of wells, each progressively farther down gradient on the piezometric surface, was established. Relative carbon-14 ages indicated a velocity of groundwater movement of 23 feet (7 meters) per year for about 85 miles (137 kilometers) of travel. A velocity of 23 feet per year was calculated independently from Darcy's law.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)