AWWA SOURCES66395 Identification of Purchase Quantity of Desalinated Water: Sweetwater Authority

Conference Proceeding by American Water Works Association, 02/01/2008

Bostad, Dennis; Garrod, Michael; Means, Edward G., III; Everest, Bill; Hunt, Andree; Hurley, Michael

Full Description

This paper describes the process undertaken by Sweetwater Authority (a member agency of San Diego County Water Authority - SDCWA) andMalcolm Pirnie, Inc. to identify the appropriate amount of annual water supplies topurchase from a proposed seawater desalination plant. To identify this quantity, Sweetwater and Malcolm Pirnie assessed the following factors:risk of spill from the reservoirs;increased reliability with supply diversification; and,benefit for developing local supplies during a shortage allocation under theSDCWA Drought Management Plan. Five alternatives were analyzed to determine the appropriate annual quantity to purchase.The alternatives represent a range of demand conditions, from fairly conservative (10%of historic demands) to worst case (the third year of a multiple dry year). The alternativesanalyzed were:10% of historic 10-year total demands;10% of projected 10-year total demands;average SDCWA demands over the past 10 years;projected SDCWA demands over a single dry year; and,projected SDCWA demands over a multiple dry year period. Includes tables.

Product Details

Edition: Vol. - No. Published: 02/01/2008 Number of Pages: 25 File Size: 1 file , 330 KB