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Recharge and Recirculation 101

       Summary

In a region of periodic droughts and floods, managing our surplus in wet years could provide enough for reliable water supply and for critical springflow during the dry years.  Our problem is not shortage, but storage.

Three sources of water are presently being studied by the Edwards Aquifer Authority for a system of Recharging and Recirculating water into the Edwards Aquifer.   The sources include:

·      Rainwater crossing the recharge zone that can be slowed down so that more water can soak in. 

·      Transfers from rivers

·      Unused permits in wet years.

 

To learn more, click here and view the detailed RECHARGE AND RECIRCULATION 101 PowerPoint web presentation
 


The average recharge from each of these sources taken separately is significant.

A new, calibrated model of the Edwards Aquifer shows multi-year residence times for recharge to the Edwards Aquifer at certain locations.  EAA rules for Recharge Recovery Rights  permit withdrawal of the enhanced recharge that remains in aquifer storage.  They allow otherwise unused Recharge Recovery Rights to be recirculated into aquifer storage so that there will be more carry-over in dry times. 

Benefits for pursuing Recharge and Recirculation:

·    Recovery Rights can be a major source of increase in “firm yield” water

o   To add supply in severe drought

o   To provide a significant portion of a 50-year additional supply

o   To protect existing Edwards Aquifer Rights from further reduction

·    Additional recharge can be dedicated to maintaining springflows during critical drought times

o   Providing a Habitat Plan that would not lead to further pumping reductions

o   Leveraging federal dollars to meet a federal mandate

o   Creating benefits for downstream flows in critical times

·    Unit costs are low compared to other options.

 
 

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Pd. Pol. Adv., Carol Patterson Campaign, Hans Helland Treasurer, P.O. Box 6949, San Antonio, Tx 78209