1 / 13

Update Ocean Desalination Feasibility Studies

Update Ocean Desalination Feasibility Studies Karl Seckel Assistant General Manager. South Orange County Challenges. Region is 95% dependent on imported water to meet potable demand

ranee
Download Presentation

Update Ocean Desalination Feasibility Studies

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Update Ocean Desalination Feasibility Studies Karl Seckel Assistant General Manager

  2. South Orange County Challenges • Region is 95% dependent on imported water to meet potable demand • Single water treatment plant and two pipelines supply imported water to more than 500,000 residents and businesses • Limited groundwater, surface water • Emergency outage of the imported water delivery system could cause significant problems for residents, businesses, and the economy

  3. Planned Reliability Improvements • System Reliability Improvements • Lined and covered reservoirs • Interconnections • Ocean desalination • Supply Reliability Improvements • Water recycling • Water use efficiency/conservation • Groundwater recovery projects • Ocean desalination

  4. Planned Reliability Improvements (cont’d) • Ocean desalination is one part of the solution – and provides two benefits: • A reliable local water source • Emergency water supply during outages of the imported delivery system

  5. SOUTH ORANGE COUNTY WATER RELIABILITY PROJECTS Cost Capacity Component$MCFS Orange County Cross $30 25+ Connector GW P P P P P GW Emergency $15 15 Service Coastal Junction $2 20 Pump Connection IRWD to JTM $16 50 IRWD to SCPS $23 50 Upper & Lower $80 32 Chiquita Reservoirs Dana Point Ocean Desal $?? Total $166 135±(1) (1) Project Capacities are not all additive Projects Further Out in Time: Camp Pendleton Ocean Desal Central Pool Augmentation Project Coastal Pipeline to SD County D D Diemer Filtration Plant Orange County Cross Connector Central Pool Augmentation Project Alignments Lake Mathews Groundwater Emergency Service IRWD to JTM Coastal Junction Pump Connection IRWD to South County Pump Station Upper Chiquita Reservoir Lower Chiquita Reservoir Dana Point Ocean Desal Coastal Pipeline to SD County Camp Pendleton Ocean Desal

  6. Dana Point Ocean Desalination Subsurface Intake System • No entrainment/impingement impacts • Reduces ocean construction impacts • Improved chance for permitting approval • Pretreatment – natural sand and gravel filtration could eliminate need for costly pre-filtration step Questions to be Answered: • Capacity of intake system • Which technology to use for well intake • Power source for treatment plant • Use of existing outfall system for brine discharge

  7. Working with Federal, State and Local Agencies • U.S. EPA • U.S. Bureau of Reclamation • U.S. Fish and Wildlife Service • U.S. Army Corps of Engineers • California Department of Water Resources • California State Lands Commission • California Department of Parks and Recreation • California Department of Fish and Game • California Coastal Commission • San Diego Regional Water Quality Control Board • County of Orange • City of Dana Point • South Coast Water District • Metropolitan Water District of Southern California

  8. Future Desalination Site Phase 1 Exploratory Test Boring Sites B4/M2 B3 B2/M1 Bore Hole//Monitoring Well Bore Hole SOCWA Outfall B1

  9. Dana Point Phase 1 Hydrogeology Conclusions • The permeability of the aquifer formation looks promising • Need information on the formations under ocean floor • Further testing needed to: • Estimate production capacityof the aquifer • Analyze water quality

  10. Phase 2 Near Shore Test Drilling Approach Drill Rig Land Surface Ocean Surface 23o Temporary Vault Ocean Bottom Infiltration Main Aquifer 40 to 130 feet ± Slant test well Fresh Water 200 to 250 feet ± Salt Water

  11. Full Scale Slant Well Concept Future Desalination Plant Site Subsurface Slant Wells & Collector Intake System SOCWA Outfall

  12. Ocean Desal Plant P Slant Well Intake System Concept 1500 feet± from beach pump to plant Drill Rig land beach ocean surface pressure differential ocean floor natural filtration tunneled pipeline gravity flow into caisson for ocean water intake screened slant well buried beach caisson or pipe collector

  13. Questions or Comments? Karl Seckel Assistant General Manager

More Related