san antonio and drought: here we go again · san antonio and drought: here we go again page 10...
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CIESS Water Forum
Kelley Neumann Senior Vice President / Strategic Resources
More information at www.saws.org
San Antonio and Drought:
Here We Go Again
February 13, 2012
February 13, 2012
San Antonio and Drought: Here We Go Again
Page 2
SAWS Current Supplies
February 13, 2012
San Antonio and Drought: Here We Go Again
Page 3
History of the Edwards Issue
1990’s Litigation
February 13, 2012
San Antonio and Drought: Here We Go Again
Page 4
Index Well Level
Historical Experience
Supply Reduction
660’+ 67.6% 650-660’ 14.9% 20% 640-650’ 9.4% 30% 630-640’ 4.3% 35% 625-630’ 2.7% 45% 625’- 1.1% 44%
Edwards Water Restrictions
February 13, 2012
San Antonio and Drought: Here We Go Again
Page 5
2007(wet) and 2008 (dry) Water Use
26,651
19,166
3,604
33,026
20,296
5,398
-
5,000
10,000
15,000
20,000
25,000
30,000
35,000
Residential General (Commercial) Irrigation2007 2008
• Residential increased 23.9%
• General increased 5.9%
• Irrigation 49.8%
Mill
ion
of G
allo
ns
February 13, 2012
San Antonio and Drought: Here We Go Again
Page 6
2011 Drought Demand
Reduced by 50 million gallons/day or more
Rain events Once per week outdoor
watering rules and no
watering on weekends.
Demand can historically
be this high in absence
of rules of use during
hot, dry periods. ~ 26,000 acre-feet
February 13, 2012
San Antonio and Drought: Here We Go Again
Page 7
Residential Seasonal Usage
Average Monthly Usage Per Residential Inside-City
Customer
0
2,000
4,000
6,000
8,000
10,000
12,000
14,000
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Ga
llo
ns
2006 Average 2007 Average 2008 Average
3 - year average
Seasonal Rate Extended to Manage Peak Demand
February 13, 2012
San Antonio and Drought: Here We Go Again
Page 8
• $250 million Investment
– Delivered 40 million gallons/ day in 2011
– More available if drought continues
Saving For a Dry Day
Aquifer Storage & Recovery (ASR)
February 13, 2012
San Antonio and Drought: Here We Go Again
Page 9
SAWS Project & Location
February 13, 2012
San Antonio and Drought: Here We Go Again
Page 10
Water Management
Annualized Project Costs
$283 $324 $400
$839$1,175
$1,924
$2,822$191
$216
$346
$0
$500
$1,000
$1,500
$2,000
$2,500
$3,000
$3,500
EdwardsAcquisitions
EdwardsLeases
Conservation RechargeEnhancements
RegionalCarrizo
Brackish Desal Ocean Desal
An
nu
ali
ze
d C
ost
pe
r A
c-F
t
Project Integration
February 13, 2012
San Antonio and Drought: Here We Go Again
Page 11
Research Wish List
• Better Groundwater models for Edwards Aquifer
• Better Groundwater models for all of Texas
– Communication tools to explain GAMs to non-scientist
• Improvements to desalination equipment
– Seasonal operations
– Energy efficiency
– Brine disposal
• Future meteorological conditions
– Duration and frequency of drought cycles
– Implications of climate change
CIESS Water Forum
Kelley Neumann Senior Vice President / Strategic Resources
More information at www.saws.org
San Antonio and Drought:
Here We Go Again
February 13, 2012