1. USA Water Use with emphasis on Southern CA David Quiros Final Project Presentation March 15, 2011

6. Desalination in CA Greatest regional water “need”, especially southern CA Imported water problems include: – Transport losses – Increased total dissolved solids (TDS) – Insecurity (transport over San Andreas fault) Water rights decreasing Increased demand with greater population scale But will it substantially augment the water supply?

8. Index Part 1: Digital Elevation Model Index ValueRange 2< 30 meters 430-60 meters 660-90 meters 890-120 meters 10120-150 meters 12150-180 meters 14180-210 meters 16210-240 meters 18240-270 meters 20> 270 meters Index Part 2: Network Analysis, Coverage Index ValueRange 1Within 20 Miles of Plant 20Greater than 20 Miles from Plant

9. Index = Part 1 + Part 2 Index ValueQualifier 3-10Most Suitable 10-15More Suitable 15-21Suitable 21-40Less Suitable >40Unsuitable

12. Final remarks Membrane separation with Reverse Osmosis makes this feasible Large energy costs in production and distribution, much of population areas unsuitable Marine coastal effects large with rationale for keeping of once-through cooling systems At $0.10/kWh, conservation is 5x cheaper than desalination, and price signals will help maintain populations, and is the suggested route.

13. Original Data (Desalination Plant Locations)

14. Model (calculation of annual rainfall)

16. Google Mashup of Original Data http://dquiros.bol.ucla.edu/mashup.html