Water Stanford University水斯坦福大学.docVIP

Water Goal Summary W1 Meet a water performance target W2 Implement water conservation strategies W2.1 Minimize consumption of potable water W2.2 Minimize water for cooling towers W2.3 Minimize water for irrigation W2.4 Reduce off-site water treatment W1 Meet a water performance target Goal Set a water performance target for a specific building type according to benchmark water consumption. Methods and Justification Green Globes awards credits for water performance target according to different building types. For schools and universities, water performance target receiving Green Globes credit divides into 3 levels: less than 45, 25, and 15 gallons per student per year. This translates to a minimum requirement of water performance target less than 45 gallons/student/year. Supply 1999 Demand 2010 Demand Mil. Gallons per day 3.033 2.7 3.6 Gallons per capita per day 165 147 196 Gallons per capita per year 60272 53655 71540 Table W1: Water supply and demand Referring to Table W1, from 1999 to 2000, Stanford has an average daily water consumption of 2.7 million gallons. This demand is expected to rise to as much as 3.6 million gallons per day by 2010, while water supply from SFPUC is only 3.033 million gallons per day. To alleviate the problem of limited supply and increasing demand of water, Stanford University has developed a master plan for water conservation. Since Stanford water performance target is to keep demand under supply, a conservative assumption of 2.7 million gallons per day from 1999 is used in Green Globes analysis. Normalized by the number of people on campus, such consumption is equivalent to 147 gallons per capita per day. This means that Stanford annual consumption is 53655 gallons per capita, which is 1192 times the minimum requirement for schools and universities to get credits in Green Globes (Table W2). Water Consumption (Gallons/student/year) Water Consumption (Normalized by GG min req) 1999 Stanford 53655 1192 14% academic 7