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Decentralised wastewater recycling schemes in WA: Towards integrated urban water management
Conference paper   Open access

Decentralised wastewater recycling schemes in WA: Towards integrated urban water management

J. Hunt, M. Anda, K. Mathew and G. Ho
3rd International Conference on Water Sensitive Urban Design (Adelaide, SA, Australia, 21/11/2004–25/11/2004)
2004
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Abstract

Integrated Urban Water Management (IUWM) seeks to extend Water Sensitive Urban Design and take a total water cycle approach that includes not only stormwater but also reuse of wastewaters where appropriate. This paper investigates the appropriateness of environmental technologies for application at decentralised scales in IUWM. A model to rate land developments based on IUWM principals is presented together with a case study on a subdivision in Western Australia where IUWM strategies have been designed. A number of different scenarios are prepared for the site being considered and finally the preferred scenario is selected. The base scenario assumes that water efficient appliances and systems will be used throughout the development. It is assumed the building guidelines will ensure scheme water use only occurs inside the home with AAA minimum water efficient appliances, rainwater from tanks supplies some internal uses, and that all landscape irrigation is by surface or subsurface drip with non-scheme sources. This alone ensures that the development is using in the order of 50% less water than a conventional development. The other scenarios variously substitute scheme and groundwater use with recycled greywater or total wastewater. Infiltration of stormwater occurs increasingly while moving through the scenarios. Local and regional strategies to improve groundwater quality increase also while moving through the scenarios.

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