AgdaPkt 2007-02-26 - Laserfiche WebLink

Browse Search

8A Page 11 Future Water Supply Reliability Figure 1 shows the historic and projected water use for Redwood City between 1975 and 2030, The projections show the incremental impacts from the City's water conservation and recycled water programs. Over time, the reduction in potable water use from these three programs progressively adds up and equals 3,374 af/yr, or 25% of water demands in 2030. Figure 1 also shows the expected SFPUC water supplies associated with 10% and 20% system-wide cutbacks that could be implemented by SFPUC, as previously described, in event of drought or emergencies. Table 4 shows this information in tabular form. As shown, holding all factors constant, Redwood City would be only modestly impacted by the 10% SFPUC cutback scenario. Under the 20% cutback scenario, Redwood City would be significantly affected, needing to reduce water use by between 19.5 and 27,7%. Thus, conservation savings and recycled water use will greatly lessen but not entirely avoid the impacts of future droughts. Figure 1: Future Water Supply Reliability (Source: Redwood City 2005 UWMP) -------1--.----.-----.....-..-.--.. I ...HiSlori~.1 ProieCle.~ ",OM 1- "000 j l-------------------- 12,000 i I I I ---- .. " >- ... " a. -a; 10,000' .. 1l; l':! o ..: -Historic I 1 ..,,_,~___...,~'",.....__~._J -I 1 I I I -Base Water Use Projection 6,000 _Water Use With Passive I . Conservation , r.-"".-.wwaler Use With Passive and Active i Conservation I I i -Water Use With Passive & Active ! i Conservation and Recycling ; I-Supply with 10% SFPUC Cutback 1- Supply with 20% SFPUC Cutback l'. n. Waler Supply AssurancB 12,243 AFY _. ___J I I 4,000 I 1975 1985 1995 2005 2015 2025 Page 8 of 10