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Published byAniyah Lovitt Modified over 9 years ago
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www.waterdm.comwww.incentware.com Urban Water Demand Trends Conservation and the Future of Residential Water Use Peter Mayer, P.E. peter.mayer@waterdm.com www.a4we.org
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Water Demand Management: Why? Water shortages Expensive to develop new supplies Climate change
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Demand Management = Serious Business
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Drought @2050 vs Notorious Recent Historical Droughts 2040-2060 PDSI = Palmer Drought Severity Index PDSI was developed by Wayne Palmer in the 1960s and uses temperature and rainfall information in a formula to determine dryness. Source: Dr. Martin Hoerling, NOAA Earth System Research Laboratory
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Utilities are Asking: Where did the demand go? City of Westminster, CO average annual household water use, 2000 – 2010, with trend line
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Seattle Public Utilities - 1990
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Forecast Without Conservation
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Firm Yield in 2013
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Forecast With Conservation
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2013
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A brief history of demand forecasting in Seattle
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Seattle Saved $725 million PV Cost of New Supply $800 Million PV Cost of Conservation: $ 75 Million _______________________________________________________________ NPV : $725 Million
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Avg. Annual Use Per SF Home (kgal) Source: Mayer, P. et. al. 2013. Residential End Uses of Water Update. AWWA - ACE, Denver, CO.
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1999 REUWS vs. 2014 REUWS gallons per household per day
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2014 REUWS Update
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Homes Meeting Efficiency Criteria Toilet < 2 gal., Clothes washer <30 gal.
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Technological change Behavioral change More intense and frequent drought Water demand management at the retail level
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Peter Mayer, P.E. peter.mayer@waterdm.com
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