Is Water Efficiency a Mitigation Strategy? Metro Atlanta’s Experience.

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Presentation transcript:

Is Water Efficiency a Mitigation Strategy? Metro Atlanta’s Experience

Drought Definition: Any shortage of water that causes water related problems or complications.

4 Levels of Drought Meteorlogic Agricultural Hydrologic Socioeconomic

2007 The Apocalypse

2012 What drought?

It must be raining more this time? 2006 – Beginning of the Drought Rainfall inches Rainfall 2007 – inches 2011 – Beginning of 2012 Drought 2011 Rainfall – inches 2012 Rainfall to date inches (we typically get on average another 10 inches before the end of the year)

Metro Atlanta and Drought Area 99% dependent on surface water. Height of 2007 drought Lake Lanier evaporating 100MGD 4 million people dependent upon two Federally controlled reseviors 3 million dependent upon Lanier – South Georgia Drought means Lanier must balance the basin to meet all needs. Lanier 9% of the drainage area 64% of the storage

Drought Response

Lake Levels September 2012 Lake Allatoona – Lake Lanier – September 2007 Lake Allatoona – Lake Lanier – (Lowest level ever 12/26/ )

What is the Difference? Cobb County-Marietta Water Authority’s Water Use Peak Water Use in 2007 (Pre Outdoor Water Ban) 148 MGD Peak Water Use in MGD 25% Reduction in Water Use

Water Efficiency Conservation Rates designed to make outdoor water use the most costly Drives smarter decisions about landscaping Limits overwatering Incentive Programs Education Programs Experience Policy Changes to encourage efficiency State Mandates Successful partnerships

A tale of two droughts

Kathy Nguyen Water Resource Manager Cobb County Water System

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