1. Constructive Water Dialogue: a key to success Fawzi Karajeh fkarajeh@water.ca.gov California Department of Water Resources For the The Southern California Water Dialogue Meeting Los Angeles, October 24, 2007

2. Total Water Withdrawals, 2000 Courtesy of Dr. Robert Wilkinson, University of California, Santa Barbara

3. Done every 5 years Water Plan update 2005 http://www.waterplan.water.ca.gov/

4. Framework for Action Sustainable & Reliable Water in 2030 3 Foundational Actions Ensure Sustainable Water Uses Use Water Efficiently Protect Water Quality Support Environmental Stewardship Implement Integrated Regional Water Management 2 Initiatives Ensure Reliable Water Supplies Improve Statewide Water Management Systems Vital Economy Healthy Environment High Standard of Living Vision

5. Diversifying Water Portfolios

6. 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

7. 0.4 0.5 0.8 1.0 1.4 2.0 3.1 By 2030

8. 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

10. 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

11. 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

12. 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

13. Energy Proposition 50 Desalination Grants Other important issues Energy 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 Authority o Coachella Valley WD Co-location / Co-generation:  Los Angeles DWP  San Diego Water Authority

14. Energy Proposition 50 Desalination Grants Energy Affordable Desalination Coalition Project

16. 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 Energy Proposition 50 Desalination Grants Energy Affordable Desalination Coalition Project

17. Power Consumption Trend for Seawater RO Source: Int. Desalination & Water Reuse Quarterly Nov-Dec 2004

18. Pilot project site Scattergood Pilot Project Site Courtesy of City of Los Angeles Department of Water and Power

19. 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 Angeles Department of Water and Power Seawater Desalination “LADWP” Pilot Project Energy Proposition 50 Desalination Grants Energy Affordable Desalination Coalition Project

20. Intake Proposition 50 Desalination Grants Other important issues Intake 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

21. Concentrate Management Proposition 50 Desalination Grants Other important issues 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

22. Pre- / Post- Treatment Proposition 50 Desalination Grants Other important issues 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.

23. Colorado Water System (Hoover Dam) Courtesy of Dr. Robert Wilkinson, University of California, Santa Barbara

24. Bay-Delta Water System (California Aqueduct) Courtesy of Dr. Robert Wilkinson, University of California, Santa Barbara

25. 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.”

26. Helpful Links Department of Water Resources www.water.ca.gov Recycling and Desalination Branch www.owue.water.ca.gov/recycle/