SWITCH Training Kit: Module 3A – Water supply Module 3: Exploring the options SWITCH Training Kit...
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Transcript of SWITCH Training Kit: Module 3A – Water supply Module 3: Exploring the options SWITCH Training Kit...
SWITCH Training Kit: Module 3A – Water supply
Module 3: Exploring the options
SWITCH Training Kit
Module 3A: Sustainable options for water supply
An overview
SWITCH Training Kit: Module 3A – Water supply
The issues facing urban water supply
Changing weather patterns due to climate change
Increasing demand for water
Deteriorating infrastructure
Energy costs
SWITCH Training Kit: Module 3A – Water supply
Links between urban water supply and other areas of the water sector
Stormwater management
Wastewater management
Water treatment
Water quality
SWITCH Training Kit: Module 3A – Water supply
Links between water supply and other sectors of urban management
Parks, gardens and recreation
Housing
Local economic development
Health
Waste management
Energy
SWITCH Training Kit: Module 3A – Water supply
The conventional approach
• Increased abstractions from rivers and aquifers
• The construction of storage reservoirs
• The transfer of water from areas with a surplus
• The use of energy and chemicals for water treatment
SWITCH Training Kit: Module 3A – Water supply
Drawbacks of the conventional approach to urban water supply
• Unsustainable use of local resources
• Cost
• Carbon emissions
• Wasteful use of resources
• Non-flexible
SWITCH Training Kit: Module 3A – Water supply
A more sustainable approach
• Using natural systems for pre-treatment of raw water
• Reducing urban water demand
• Using alternative, non-conventional sources of supply
SWITCH Training Kit: Module 3A – Water supply
• Riverbank filtration
• Reduction in system losses
• Metering and tariffs
• Domestic water efficiency measures
• Rainwater harvesting
• Greywater reuse
• Public education
A more sustainable approach
Options include:
SWITCH Training Kit: Module 3A – Water supply
Benefits of water demand management solutions
• Reduced treatment and pumping costs• Reduced abstractions from the environment• Reduced infrastructure investment costs• Reduced water shortages• Reduced carbon emissions• Reduced runoff• Reduced interruptions to water supply• Reduced volumes of wastewater
SWITCH Training Kit: Module 3A – Water supply
Why a non-conventional approach is more sustainable
Improved water supply reliability
Reduced water bills
Reduced abstraction, treatment and pumping costs
Reduced infrastructure costs
Less water abstracted
Reduced carbon emissions
SWITCH Training Kit: Module 3A – Water supply
Acknowledgements
Ralph Philip and Barbara Anton ICLEI – Local Government’s for Sustainability
based on the joint efforts of the following SWITCH partners:
C. Muñoz-Trochez (WEDC Loughborough University), S. Kayaga (WEDC Loughborough University), S.K. Sharma (UNESCO-IHE), I. Smout (WEDC Loughborough University), A. Turner (University of Technology Sydney), S. White (University of Technology Sydney), S.K. Maeng (UNESCO-IHE), M.O. Rivett (University of Birmingham), D. Rousseau (UNESCO-IHE), S.K. Sharma (UNESCO-IHE)
The UNESCO-IHE led SWITCH project runs from Feb. 2006 to Jan. 2011 and is part-financed by Directorate General Research of the European Commission under the Sixth Framework Programme. For more information see www.switchurbanwater.eu
This presentation has been produced as part of the SWITCH Training Kit by: