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Constructive Water Dialogue: a key to success
Fawzi [email protected]
California Department of Water Resources
For theThe Southern California Water Dialogue Meeting
Los Angeles, October 24, 2007
Total Water Withdrawals, 2000
Courtesy of Dr. Robert Wilkinson, University of California, Santa Barbara
• Done every 5 years
• Water Plan update 2005
• http://www.waterplan.water.ca.gov/
Framework for ActionSustainable & Reliable Water in 2030
3 FoundationalActions Ensure
SustainableWater Uses
UseWater
Efficiently
ProtectWaterQuality
SupportEnvironmentalStewardship
ImplementIntegrated
Regional WaterManagement
2 InitiativesEnsure ReliableWater Supplies
ImproveStatewide Water
ManagementSystems
Vital EconomyHealthy Environment
High Standard of Living
Vision
DiversifyingWater
Portfolios
Resource Management Strategies Reduce Water Demand• Agricultural Water Use Efficiency• Urban Water Use Efficiency
Improve Operational Efficiency & Transfers
• Conveyance• System Reoperation• Water Transfers
Increase Water Supply• Conjunctive Management & Groundwater
Storage• Desalination –Brackish & Seawater• Precipitation Enhancement• Recycled Municipal Water• Surface Storage – CALFED• Surface Storage - Regional/Local
Improve Water Quality• Drinking Water Treatment and
Distribution• Groundwater/Aquifer Remediation• Matching Quality to Use• Pollution Prevention• Urban Runoff Management
Practice Resource Stewardship• Agricultural Lands Stewardship• Economic Incentives (Loans, Grants,
and Water Pricing)• Ecosystem Restoration• Floodplain Management• Recharge Areas Protection• Urban Land Use Management• Water-Dependent Recreation• Watershed Management
0.4 0.40.5
0.81.0
1.4
2.0
3.1By 2030
How is Desalination different from other water supply alternatives?
Unique opportunities: Provides new water supply from oceanwater and unusable
brackish groundwater/reliable Helps alleviate the overdraft of conventional sources Drought resistant/combatant High quality product water Unaffected by climate changes! Flexible modular capacity- can be increased to meet demand
or reduced to reduce supply and or energy consumption Can reclaim contaminated sources which without treatment
are unusable Desal technology makes more water recycling and reuse
possible
Co-location: Operating Scenarios
Assess the impact of various operating conditions:
1. Desalination facility operates only when the power plant operates and requires no additional feedwater
2. Desalination facility operates at times when the power plant is not fully operational, potentially requiring additional feedwater and energy production
3. Changes in the power plant cooling system potentially result in the need for additional feedwater beyond that required by the power plant, with potential impacts on mixing and dilution of the concentrate
4. Closing of a power plant leaves the desalination facility requiring another source of power, its own feedwater and other approaches to mixing and dilution
Co-location: Studying the Issues
Validate / identify the limits of potential benefits:
1. Use of existing feedwater infrastructure
2. Use of existing discharge infrastructure
3. Reduce power transmission costs and line losses
4. Use of power plant cooling water, eliminating the need for additional feedwater (and associated impacts)
5. Dilute brine concentrate with discharge from the power plant, thus decreasing the impacts associated with concentrate discharge
Co-location: DWR Policy
1. Commit to answering questions about the feasibility of seawater desalination along the California coast and the viability of co-location.
2. Prop. 50 funded projects affected by the co-location issue (2 pilots, 1 feasibility, and 1 R&D) will help provide needed information to make informed decisions on future funding for such projects.
3. While taking advantage of the benefits of co-location, it is important that desalination facilities proposing to co-locate with power plants should not aggravate or perpetuate the environmental impacts of these plants.
4. Any future full-production facilities of this nature will have to abide by all laws and regulations governing feed water intake as well as brine discharge
Proposition 50 Desalination GrantsOther important issues
EnergyEnergy
Energy Recovery/Efficiencies: Affordable Desalination Coalition East Bay MUD City of Avalon City of Oxnard …
Alternative / Renewable Energy: Geothermal VTE: USBR Solar Distillation:
o Sweetwater Authorityo Coachella Valley WD
Co-location / Co-generation: Los Angeles DWP San Diego Water Authority
Proposition 50 Desalination GrantsEnergyEnergy
Affordable Desalination Coalition Project
Proposition 50 Desalination GrantsEnergyEnergy
Affordable Desalination Coalition Project
Affordable Oceanwater Desalination Demonstration Project
Main Objective: Test energy recovery efficiency, pump efficiency, and low pressure reverse osmosis membranes.
Location: Naval Facilities Engineering Service Center in Port Hueneme.
Partners: Cal. Energy Commission; Local Water Agencies; USBR; US Navy; Research Institutions; Consulting firms.
Anticipated Results: Reduction of total energy consumption by up to 40% over the commonly used technology.
Status: On-going
Proposition 50 Desalination GrantsEnergyEnergy
Affordable Desalination Coalition Project
Power Consumption Trend for Seawater RO
20.00
8.10
4.864.05
2.431.62
0.00
5.00
10.00
15.00
20.00
1975 1980 1985 1990 1995 2000 2005
kW
h/m
3
Source: Int. Desalination & Water Reuse Quarterly Nov-Dec 2004
Pilot project site
Scattergood Pilot Project Site
Courtesy of City of Los AngelesCourtesy of City of Los AngelesDepartment of Water and PowerDepartment of Water and Power
• Develop environmentally sensitive treatment process adaptable to alternate source water intakes
• Confirm ability to meet water quality goals in cost effective manner
• Optimize pretreatment process that is robust, reliable, and sustainable
• Evaluate warm and cold water as source of supply
Courtesy of City of Los AngelesCourtesy of City of Los AngelesDepartment of Water and PowerDepartment of Water and Power
Seawater Desalination “LADWP” Pilot Project
Proposition 50 Desalination GrantsEnergyEnergy
Affordable Desalination Coalition Project
Proposition 50 Desalination GrantsOther important issues
IntakeIntake
Horizontal/Slant Well Technology: Municipal Water Dist. of Orange County
Under Ocean Floor Intake: Long Beach Water Dept.
Subsurface Intake Filter: Montara Water & Sanitation Dist.
Co-location with power plant cooling intake:
LA Dept. of Water & Power
San Diego Water Authority
Proposition 50 Desalination GrantsOther important issues
Concentrate Management Concentrate Management
Zero Liquid Discharge:
Indian Wells Valley Water Dist.
Sweetwater Authority
Recovery Enhancement: Eastern Municipal Water Dist.
Metal Removal: Calleguas Municipal Water Dist.
Brine Line / Concentrate Conveyance:
San Diego County Water Authority
Irvine Ranch Water Dist.
Percolation well: Sand City
Under Ocean Floor Discharge: Long Beach Water Dept.
Discharge Co-location:
w/ power plant outfall: San Diego County Water Authority (San Onofre)
w/ wastewater plant discharge: Marin MWD, Los Angeles DWP
w/ industrial cooling water outfall: East Bay MUD
Evaporation Ponds: Coachella Valley WD
Proposition 50 Desalination GrantsOther important issuesPre- / Post- Treatment Pre- / Post- Treatment
Pre-Treatment
UV, Chlorine Dioxide: Long Beach Water Dept.
MF/UF:
Los Angeles DWP
Affordable Desalination Coalition
City of Camarillo
NF: Long Beach Water Dept.
Biotoxins, Phytoplankton Blooms: West Basin MWD
Post-Treatment
Blending / Product Water Effects:
Long Beach Water Dept.
Municipal Water Dist. Of Orange County
West Basin MWD
Disinfection/Stabilization: Long Beach Water Dept.
Colorado Water System(Hoover Dam)
Courtesy of Dr. Robert Wilkinson, University of California, Santa Barbara
Bay-Delta Water System(California Aqueduct)
Courtesy of Dr. Robert Wilkinson, University of California, Santa Barbara
There is only certain ways that you can generate electricity. There are only certain number of finite technologies, each with their own strength and weaknesses, each with their own cost to produce, each with own effect on the environment.” Chuck DeVore (Assemblyman- Irvine) SN&R Oct 18, 2007.
There is only certain ways that you can generate electricity “Water”. There are only certain number of finite technologies “options”, each with their own strength and weaknesses, each with their own cost to produce, each with own effect on the environment.”
Helpful Links
Department of Water Resources
www.water.ca.gov
Recycling and Desalination Branch
www.owue.water.ca.gov/recycle/
