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TRANSCRIPT
Innovative Water Technologies’ Programs
5th Annual Summer Seminar 2015 San Antonio Water Systems
July 24, 2015 By Erika Mancha
The following presentation is based upon professional research and analysis within the scope of the Texas Water Development Board’s statutory responsibilities and priorities but, unless specifically noted, does not necessarily reflect official Board positions or decisions.
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Mission
To provide • Leadership, • Information, • Education, and • Support for planning,
financial assistance, and outreach
for the conservation and responsible development of water for Texas.
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Texas Water Development
Board
Water Science &
Conservation
Water Supply &
Infrastructure
Operations & Administration
Finance
Mission
To provide • research, • develop, and • disseminate
information to advance the development of innovative water management strategies in Texas.
Innovative Water
Technologies
Aquifer Storage
Recovery (ASR)
Water Reuse Desalination
Brackish Resources
Aquifer Characterization System (BRACS)
Rainwater Harvesting
Aquifer Storage and Recovery (ASR)
San Antonio Water Systems City of Kerrville El Paso Water
Utilities
Production Capacity 60 MGD 2.65 MGD 12 MGD
Operational 2004 1998 1985
Source Groundwater Treated surface water Treated Wastewater
Aquifer Carrizo Lower Trinity Hueco Bolson
Feasibility studies funded in 1990s
An Assessment of Aquifer Storage and Recovery in Texas in 2011
Geological Characterization and Data Collection in the Corpus Christi
Technical Note 15-04 Aquifer Storage and Recovery in Texas 2015
• Published June 2015 • Regulatory Framework • Past activities • Current Facilities • 2012 State Water Plan • Other Investigations
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• Historical Activity
• Existing Facilities
• Studies
• Evaluations
• Recommended Water Management Strategies in 2012 State Water Plan
Aquifer Storage and Recovery Activities in Texas
Demonstration Projects for Alternative Water Supplies Grants
• 84th Texas Legislature appropriated from General Revenue Fund $1,000,000 for Fiscal Year 2016 and 2017
• Senate Bill 1, Rider 25 “…for demonstration projects or feasibility studies to prove up certain aquifer storage and recovery projects or any other demonstration projects or feasibility studies that will create new water supplies or otherwise increase the availability of water through use of innovative storage approaches that improve operational efficiencies.”
• Groundwater Conservation Districts to provide matching funds
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Rainwater Harvesting
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• Annual competition program established in October 1, 2007
• Open to all individuals, companies, organizations, municipalities, and local/state governmental entities in Texas
• Three categories – Residential,
– Commercial/industrial, and
– Educational/governmental
• Judging criteria available on the website
• Winners announced at our board meeting in spring and feature on TWDB’s website
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Rainwater Harvesting Reports
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Rainwater Harvesting Training Under Local Government Code §580.004
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Brackish Resources Aquifer Characterization System (BRACS)
• Map and characterize brackish aquifers of the state
• ~2.7 billion acre-feet of brackish groundwater
BRACS Study Areas
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BRACS Reports
Pecos Valley Aquifer • Foundation for methods
Data Dictionary • Describes structure of
the database
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BRACS Data
• Database – Microsoft Access 2007 format – Well data (water, oil/gas)
• ~47,000 data records
• GIS data – Total Dissolved Solid Values
• Geophysical well logs – Available upon request
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Relating to the Development
Brackish Groundwater House Bill 30 (84th Texas Legislature)
• $2,000,000 from General Revenue Fund • Four aquifers must be completed by December 2016
– Carrizo-Wilcox Aquifer located between the Colorado and Rio Grande Rivers,
– Gulf Coast Aquifers and sediments bordering that aquifer,
– Blaine Aquifer, and
– Rustler Aquifer
• Other selected aquifers - must be completed by December 2017
• Designate brackish groundwater production zones • Estimate 30- and 50-year production without causing significant impact
to fresh water aquifers • Include the four aquifer reports, in biennial desalination report due
December 1, 2016 (Water Code Sec. 16.060) • Remaining aquifers in the state will be mapped by 2022
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Desalination Plants
Desalination Plant Capacity in Texas
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12 14
38 44 46
22 MGD 30 MGD
75 MGD
120 MGD 123 MGD
0
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40
60
80
100
120
140
1999 2001 2005 2010 2012
Plan
t Cap
acity
Mill
ion
Gal
lons
per
Day
(MG
D)
and
Num
ber
of F
acili
ties
Year
Number of Facilities Plant Capacity
Desalination Reports Guidance Manual for Permitting Class I and Class II Wells for the
Injection and Disposal of Desalination Concentrate
Developing Practical Alternatives to Pilot Plant Studies for Innovative
Water Technologies
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Seawater Desalination
• One operational seawater desalination facility in Florida – Tampa Bay Seawater Desalination Plant (25 million gallons
per day)
• Second plant is currently being built in California
– Carlsbad Desalination Project (50 million gallons per day)
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ID Project Feasibility Pilot
1 Laguna Madre Yes Yes
2 Brownsville Yes Yes
3 San Antonio -- --
4 Freeport Yes --
5 Corpus Christi Yes --
6 GBRA Yes --
6 Guadalupe-Blanco River Authority
Seawater Desalination Reports
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• Sixth report in series • 12 years of activities
toward advancing seawater desalination
• Provides a status update
Direct Potable Water Reuse Existing and Proposed Facilities
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• Raw Water Production Facility
– Operating since May 2013
• Direct Potable Reuse Project – Operating since July 2014
(emergency project)
• Advanced Purified Water Treatment
– Completed piloting protocol
• Direct potable reuse project – Awaiting city council approval
Evaluating the Potential for Direct Potable Reuse
• Contaminants of Concern • Water quality performance targets • Water quality characterization • Source control • Treatment technologies • Environmental buffers • Quantitative relative risk assessment • Pilot protocols • Regulatory summary • Public awareness and outreach
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Testing Water Quality in a Municipal Wastewater Effluent Treated to Drinking Water Standards
Quarterly sampling Chemicals of Emerging
Concern microbial pathogens
Develop correlations for surrogates compounds
Guidance document for monitoring at direct potable reuse facilities
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Sample Locations
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Brazos River Research Wetland • Engineered wetland constructed in Waco, Texas to
evaluate how endocrine disrupting compounds can be reduced from treated wastewater effluent.
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Erika Mancha Innovative Water Technologies (512) 463-7932 [email protected]
Innovative Water Technologies www.twdb.texas.gov/innovativewater/index.asp
2012 Water Usage in Texas
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2.0 % Reused ~319,000 acre-feet
16,012,545 acre-feet Total Water Use
4,470,999 acre-feet Municipal Water Use
5.8 % is Reused ~261,451 acre-feet
2012 Water Use Survey