San Francisco, CaliforniaSan Francisco relies on spring snowmelt stored in the Hetch Hetchy Reservoir in the Sierra Mountains for 85% of its drinking water supply, and the city forecasts that global warming could have long-term negative effects on this resource. And while changes to runoff patterns anticipated by 2025 are expected to fall within current annual variations, more research is necessary to make further predictions.The city has serious concerns about rising sea levels as well. Rising seas and more frequent and intense rainstorms could result in increased flooding in low-lying areas and threaten city infrastructure such as pipelines and sewage treatment plants. The San Francisco Public Utilities Commission has implemented several programs to help residents and businesses become more water efficient. The Commission offers rebate coupons for residents who purchase water efficient toilets and clothes washers, and also offers free efficient showerheads. Customers may also sign up for a free “Water Wise house call,” which provides a comprehensive review of their household’s water usage and suggests methods for eliminating water waste. Long term, the utility is implementing an adaptation strategy that involves diversifying water sources and integrated urban water management plans, and an action plan that seeks to advocate for increased research and engage water system ratepayers in the issue. 2007 AMWA Annual Meeting Presentation: Modeling, Coalition Building, and Adaptation Response: San Francisco's Approach to Climate Change. 
|
