Derived Operating Rules for Allocating Recharges and Withdrawals among Unconnected Aquifers
Publication: Journal of Water Resources Planning and Management
Volume 132, Issue 1
Abstract
Six balancing rules are derived to inform short-term drawdown and recharge of water in multiple, unconnected aquifers. Management objectives are: (1) minimizing costs; (2) maximizing duration of operation; and (3) maximizing accessibility as a tradeoff between maximizing instantaneous withdrawal rate and the duration to sustain withdrawals. Engineering optimization formulations use either a specified target delivery rate (for withdrawals) or available surface water supply (to recharge). Aquifers are modeled as separate, single-celled basins with lumped parameters representing key physical, institutional, and financial characteristics. Each formulation is solved analytically for the case where constraints are nonbinding. Solutions are explained as operating rules. Two examples confirm the analytical solutions. The results show how cost characteristics, fraction of recharged water available for withdrawal (fractional recovery), initial storage, maximum recharge and pumping rates, and uncertainties regarding the future availability of water for extraction influence recharge and withdrawal decisions.
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Acknowledgments
Tim Blair introduced the aquifer recharge problem. The writers also thank Richard Howitt and Beth Faber for their comments and suggestions.
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Information & Authors
Information
Published In
Journal of Water Resources Planning and Management
Volume 132 • Issue 1 • January 2006
Pages: 25 - 34
Copyright
© 2006 ASCE.
History
Received: Oct 11, 2004
Accepted: May 26, 2005
Published online: Jan 1, 2006
Published in print: Jan 2006
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