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Towards water sensitive urban settlements – integrating design, planning and management of South Africa’s towns and cities. K. Winter, K. Carden, L. Fisher-Jeffes, & S.Pan Public input into the National Water Resource Strategy October 2012. Urbanisation in SA, 1950 - 2030.

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K winter k carden l fisher jeffes s pan

Towards water sensitive urban settlements – integrating design, planning and management of South Africa’s towns and cities

K. Winter, K. Carden, L. Fisher-Jeffes, & S.Pan

Public input into the National Water Resource Strategy

October 2012


Urbanisation in sa 1950 2030

Urbanisation in SA, 1950 - 2030

Source: Haldenwang, 2010


Water sensitive urban design wsud

Water Sensitive Urban Design (WSUD)

  • Multi-disciplined approach to urban water management aimed at managing the urban water cycle in a more sustainable manner so as to improve water security (Wong, 2006).

  • Considers the environment in conjunction with infrastructure planning, design and management at the earliest possible stage of any decision-making process (McAlister, 2007).


Influence of wsud on the urban water cycle

Influence of WSUD on the urban water cycle

Source: Hoban & Wong (2006)


K winter k carden l fisher jeffes s pan

Potable water supply and treatment plant

Water treatment plant

Natural environment

Built environment

USE

Human consumption - kitchen

Hot water system

Shower and bathroom taps

Clothes washing

Toilet flushing

Garden irrigation

Built environment

Sewage treatment plant (STP)

Natural environment

Discharge


K winter k carden l fisher jeffes s pan

Potable water supply and treatment plant

MINIMISE

Natural environment

Built environment

Stormwater

treatment

Train

All water is an opportunity

Not a threat

USE

Human consumption - kitchen

Hot water system

Shower and bathroom taps

Clothes washing

Toilet flushing

Garden irrigation

REUSE

Sewage treatment plant (STP)

Built environment

Natural environment

Discharge

Discharge

PROTECT & ENHANCE ENVIRONMENT

MINIMISE


Descriptive understanding of wsud

Descriptive understanding of WSUD

“…mitigating water scarcity, improving water quality, thereby protecting ecosystems, through the development of water sensitive urban areas (for all) that are sustainable, resilient and adaptable to change, while simultaneously being a place where people want to live….”


Narrative definition

Narrative definition


Wsud principles strategies

WSUD principles / strategies

  • Sustainable water supply options

  • water conservation / demand management

  • alternative water sources, e.g. rainwater / stormwater harvesting

  • aquifer storage

  • Wastewater minimisation

  • quality improvement

  • use of treated wastewater / recycled water

  • Stormwater management

  • SUDs (Sustainable Urban Drainage)

  • enhancement of amenity and biodiversity


Wsud transitions framework

Cape Town

WSUD transitions framework

Source: Brown et al. (2008)

Ethekwini


Green point park cape town

Green Point Park, Cape Town


And the ugly

And the ugly.

Housing

Water Supply

Drainage

Sanitation

Solid Waste


Wsud transitions framework1

WSUD transitions framework

Source: Brown et al. (2008)


Vision

Vision

WSUD in SA: “2 History’s, 1 future”

Water supply city

Sewer City

Drained city

Water way City

Water cycle city

History

The road ahead

What we need to do now

Goal

Informal settlements

Un-service high density areas

Apartheid/separate development

Develop water sensitive services

Water Sensitive city

Develop water sensitive services

Green fields

Formal settlements

RETRO FIT

WSUD a tool for redress and sustainability


The vision component

The Vision Component

History

What we need to do now

The road ahead

Goal

Needs

Civil unrest/demand for equitable services

Need for “cheap” labour

Water scarcity, public health

Water

supply communities

Sewered communities

Drained communities

Waterway Communities

Water

cycle communities

Un-serviced, high density communities

Develop water sensitive services

Apartheid/separated communities

Informal

settlements

Amenity and environmental protection

Limits on natural resources

Inter-generational equity

Allow the formation of informal settlements with no services

Adhoc provision of services

Water Sensitive Cities

Develop water sensitive services

Green fields

Water Supply

Public Health

Flood Protection

Management of diffuse pollution

Fit for purpose use of water

Adaptive, multifunctional infrastructure designed to emphasise water sensitivity

Formal

settlements

RETRO FIT

Supply Hydraulics

Separate Sewers

Channelization

Integrated Urban Water Cycle management (IUWCM), management of point source

Solutions


Presentation of benefits of wsud

Presentation of benefits of WSUD


Acknowledgements

Acknowledgements

Water Research Commission of South Africa – Contract no. K5/2071: “Water Sensitive Urban Design (WSUD) or Low Impact Design (LID) for improving water resource protection/conservation and reuse in urban landscapes”


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