Water Supply and Drought Managment Update - Oct. 23, 2014

Water Supply and Drought Management Update

Water Planning Committee October 23, 2014

Presentation by: Alexi Schnell Water Resources Specialist

Lake Oroville, September 5, 2014

Photo: Mike Blake/ Reuters

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U.S. Winter Outlook, Issued October 16, 2014

“…California’s record-setting drought will likely persist or intensify in large parts of the state.”

“Complete drought recovery in California this winter is highly unlikely.”

“While we’re predicting at least a 2 in 3 chance that the winter precipitation will be near or above normal throughout the state, with such widespread, extreme deficits, recovery will be slow.”

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0%

25%

50%

75%

100%

125%

150%

175%

2006 2007 2008 2009 2010 2011 2012 2013 2014

173%

53% 60% 65%

91%

146%

62% 59%

35%

Average Water Year Statewide Runoff Percent of Average (Water Year: Oct 1 – Sept 30)

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State Water Project Reservoir Storage Conditions

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0%

20%

40%

60%

80%

100%

120%

140%

Water Year Inflow to Lake Powell on the Colorado River

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SWRCB Emergency Regulations Monthly Reporting

Water Production by Urban Water Suppliers

SWRCB staff reported statewide production down 11.5% in August

South Coast region down 7.8% in August 8.5 billion gallons saved

Anticipate September statewide production numbers released at Nov. 4th SWRCB meeting

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Fiscal Year Potable Water Use in Water Authority Service Area

20,000

40,000

60,000

Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun

Acre-Feet

Water Use FY14 (AF) Water Use FY15 (AF)

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Average Daily Maximum Temperature at Lindbergh Field – Departure from Normal (oF)

-2.0

0.0

2.0

4.0

6.0

8.0Fiscal Year 2014 Fiscal Year 2015

September 2014 was 5.1o F warmer than normal

Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun

Hotter

Cooler

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Current Drought Activities

Monitor water use and drought conditions

Assist member agencies in compliance with SWRCB Emergency Regulations

Participate in MWD member agency review of Water Supply Allocation Plan

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Initiate review of Water Authority’s Supply Allocation Methodology in early December 2014