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How much recharge occurs from watering lawns?

Posted by: Aqua Blog Maven on June 29, 2009 at 6:17 am

From the Pasadena SubRosa blog, the conversation on whether landscape irrigation recharges groundwater or not continues:

Last Week Pasadena Star News Public Editor Larry Wilson started a running discussion going at the JFleck at Instain blog on the question of how much groundwater recharge occurs from watering lawns?

http://www.inkstain.net/fleck/?p=3737#comments

The answers ranged from zero for those mostly amateurs trying to expound from Albuquerque on the Raymond Basin in Pasadena, to about 25%, or 7,000 acre feet of water (enough to supply 14,000 households or about 35,000 people) according to David Powell, a retired water engineer residing in Pasadena based on prior studies.

To put this in perspective, the City of Pasadena is mandating a 10% cutback in water use which is about 3,500 acre feet per year (enough to supply 7,000 households or about 17,500 people). So the calculation of groundwater recharge is a big deal.

Read more from the Pasadena SubRosa blog by clicking here.

June 29, 2009 · Filed Under Conservation

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