8 Water and Sewage Part 1 Review.docx

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Ryerson University
Environment and Urban Sustainability
EUS 202
Christopher Greene

WATER & SEWAGE PART 1 Water Use in North America  the United States= 2 ; Canada=4 th  pressures on freshwater resources: o Climate Change o Pollution o Population Growth o Resource Extraction o Intensification of Oil and Gas  ^ demand for water & water treatment o ^energy use & GHG/pollutants  Need ^ infrastructure capacity o ^ infrastructure capacity =>^$ (construction, monitoring, treatment,maintenance) o ^$=^tax  ^water conservation efforts=less shortages Water and Energy are connected Promoting Water Conservation  Discounted prices=less $ to maintain or repair system  equity issues with metering & raising prices  supply side management  new wells, deeper wells, diversions=unsustainable o Easiest =exploited first & less $ o Remaining =difficult to access & ^$  Demand-side management: less h2o through changing behavior/technology improvements o benefits: less$/treatment requirements/pressure to ^capacity Soft Path  ^demand-side management  holistic way of water resource management  how/why h2o used  goal: sustainability/long-term behavior shift/institustional/management change  Soft Path Principles WATER & SEWAGE PART 1 o Treat water as a service rather than an end in itself: alternatives to water-based services rather reducing use or increasing supply o Make ecological sustainability a fundamental criterion: ecosystem+humans o Match the quality of water delivered to the quality needed at end use: match use with what it is needed for  Recycling water can reduce wastewater generation/energy input/treatment required o Plan from the future back to the present: Traditional approach to planning begins in the present and forecasts into the future  identify policies =>desirable end Role of Senior Government Tools and Initiatives  Voluntary o Water Efficient Demonstration Garden: educate the public about technology and techniques  Technology: drip irrigation, weather-based irrigation, capture systems for rain and runoff, permeable surface materials  Techniques: drought tolerant landscaping, mulching o Education Pro
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