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Science 14 June 2002:
Vol. 296. no. 5575, pp. 1985 - 1990
DOI: 10.1126/science.1067123
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Review

Flow and Storage in Groundwater Systems

William M. Alley,1* Richard W. Healy,2 James W. LaBaugh,1 Thomas E. Reilly1

The dynamic nature of groundwater is not readily apparent, except where discharge is focused at springs or where recharge enters sinkholes. Yet groundwater flow and storage are continually changing in response to human and climatic stresses. Wise development of groundwater resources requires a more complete understanding of these changes in flow and storage and of their effects on the terrestrial environment and on numerous surface-water features and their biota.

1 U.S. Geological Survey, 411 National Center, Reston, VA 20192, USA.
2 U.S. Geological Survey, Post Office Box 25046, Mail Stop 413, Denver Federal Center, Lakewood, CO 80225, USA.
*   To whom correspondence should be addressed. E-mail: walley{at}usgs.gov

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