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SWITCH Training Kit: Module 3A – Water supply Module 3: Exploring the options SWITCH Training Kit Module 3A: Sustainable options for water supply An overview

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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

More sustainable solutions

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: