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Published on December 28, 2007

Author: Junyo

Source: authorstream.com

Constructive Water Dialogue: a key to success:  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 Total Water Withdrawals, 2000:  Total Water Withdrawals, 2000 Courtesy of Dr. Robert Wilkinson, University of California, Santa Barbara Slide3:  Done every 5 years Water Plan update 2005 http://www.waterplan.water.ca.gov/ Framework for Action Sustainable & Reliable Water in 2030:  Framework for Action Sustainable & Reliable Water in 2030 Use Water Efficiently Protect Water Quality Support Environmental Stewardship Implement Integrated Regional Water Management Improve Statewide Water Management Systems Vital Economy Healthy Environment High Standard of Living Diversifying Water Portfolios:  Diversifying Water Portfolios Resource Management Strategies:  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 Slide7:  By 2030 How is Desalination different from other water supply alternatives?:  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:  Co-location: Operating Scenarios Assess the impact of various operating conditions: Desalination facility operates only when the power plant operates and requires no additional feedwater Desalination facility operates at times when the power plant is not fully operational, potentially requiring additional feedwater and energy production 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 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:  Co-location: Studying the Issues Validate / identify the limits of potential benefits: Use of existing feedwater infrastructure Use of existing discharge infrastructure Reduce power transmission costs and line losses Use of power plant cooling water, eliminating the need for additional feedwater (and associated impacts) Dilute brine concentrate with discharge from the power plant, thus decreasing the impacts associated with concentrate discharge Co-location: DWR Policy:  Co-location: DWR Policy Commit to answering questions about the feasibility of seawater desalination along the California coast and the viability of co-location. 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. 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. 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 Grants Other important issues 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: Sweetwater Authority Coachella Valley WD Co-location / Co-generation: Los Angeles DWP San Diego Water Authority Proposition 50 Desalination Grants Energy Affordable Desalination Coalition Project:  Proposition 50 Desalination Grants Energy Affordable Desalination Coalition Project Slide15:  Proposition 50 Desalination Grants Energy Affordable Desalination Coalition Project Slide16:  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 Grants Energy Affordable Desalination Coalition Project Power Consumption Trend for Seawater RO:  Power Consumption Trend for Seawater RO Source: Int. Desalination & Water Reuse Quarterly Nov-Dec 2004 Scattergood Pilot Project Site:  Pilot project site Scattergood Pilot Project Site Courtesy of City of Los Angeles Department of Water and Power Proposition 50 Desalination Grants Energy Affordable Desalination Coalition Project:  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 Proposition 50 Desalination Grants Energy Affordable Desalination Coalition Project Proposition 50 Desalination Grants Other important issues 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 Proposition 50 Desalination Grants Other important issues 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 Proposition 50 Desalination Grants Other important issues 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. Colorado Water System (Hoover Dam):  Colorado Water System (Hoover Dam) Courtesy of Dr. Robert Wilkinson, University of California, Santa Barbara Bay-Delta Water System (California Aqueduct):  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. 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:  Helpful Links Department of Water Resources www.water.ca.gov Recycling and Desalination Branch www.owue.water.ca.gov/recycle/

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