Managed Aquifer Recharge (MAR): Has the greatest international use; less common in this country. The original definition referred to intentional banking and treatment of water in aquifers.
Managed Underground Storage of Recoverable Water (MUS): Introduced in 2008 by NRC’s Committee on Sustainable Underground Storage of Recoverable Water to define “purposeful recharge of water into an aquifer system for intended recovery and use as an element of longterm water resource management.” Southwest Hydrology is using the broad definition of ASR."
Since, no clear consensus exists regarding an exact definition, the term ASR throughout most of this website will refer to the injection and recovery of water via wells, irrespective of the number of wells, provided that such wells directly access the storage aquifer; in addition, injected and recovered water is used as a water resource management tool and aquifer restoration purposes. This definition puts parameters on the hydrogeologic conditions required for an ASR scheme to be deemed feasible and for the development of such projects to be used primarily for the purpose of boosting water supply and/or enhancing overdeveloped aquifers.
For a general overview of the basics of ASR and the importance of groundwater, please view the following presentation: