Historical Benefits Water Conservation Source Control

Written by peter@uwcs.com.au

July 8, 2016

HH_expense

Average household water bills for all Australian water utilities, major Australian water utilities and NSW major water utilities. Sustainable (BASIX) households in NSW have reduced growth in utility water bills.

Water resources, stormwater and waterway benefits of water conservation measures for Australian capital cities

Peter J Coombes, Michael Smit, Josh Byrne and Christopher J Walsh. Presentation at Stormwater 2016 Conference: 2:15 pm on Thursday 1 September 2016

Water conservation and source controls at households includes rainwater harvesting and water efficient appliances. These approaches made a profound contribution to Australian society by ensuring that many cities did not run out of water during the millennium drought. Nevertheless, as the memory of millennium drought fades, the value of sustainable households is contested.

The society benefits of source control and water efficiency was investigated using audited metadata from national agencies and water utilities, peer reviewed research, selected case studies and a Systems Framework analysis of Australian capital cities. The key findings of this investigation confirm the substantial contribution of sustainable buildings to improving the performance of water cycle infrastructure and ecological systems in cities.

In 2014, more than 1.12 million households in capital cities included rainwater harvesting and water efficient appliances to provide over 125 GL of water savings at a value of greater than $400 million to households. These average annual savings in reduced water bills are $355 per household. These households also reduced greenhouse gas emissions by up to 350,000 tonnes and provided net present benefits for water security of over $483 million. The water security benefit of sustainable buildings was more than $429/household. These households also contributed to protection of urban waterways by substantial reductions in stormwater runoff volumes (65 GL) and contaminant loads (TSS: 13,040 tonnes/year; TP: 25 tonnes/year; TN: 172 tonnes/year).

Source control measures including rainwater harvesting, water efficient appliances and vegetable gardens at households makes a substantial contribution to the viability of water resources and ecosystems in Australian capital cities. The case studies presented in this paper also demonstrate that sustainable buildings and households operate as integrated systems to produce synergistic and accumulative benefits for water conservation, protection of waterways, improving the performance of infrastructure, and decreasing impacts on ecosystems.

 

About
Dr Peter Coombes

Dr Coombes has spent more than 30 years dedicated to the development of systems understanding of the urban, rural and natural water cycles with a view to finding optimum solutions for the sustainable use of ecosystem services, provision of infrastructure and urban planning.

Connect with Peter

Related Articles

An Interesting Year for a Systems Scientist

An Interesting Year for a Systems Scientist

An interesting year for a systems scientist
It has been an interesting and productive year that included fascinating applied science and policy projects, research activity and contributions legal, economic and planning domains.

Is zero afflux the question or answer to better flooding outcomes?

Is zero afflux the question or answer to better flooding outcomes?

Presentation by Peter J Coombes and Andrew Allan at HWRS 2022: Is zero afflux the real challenge or solution for better flood management? It is vitally important to establish science and legally based rules for fair administration of the objectives and exploration of options that respond to flood risks. Otherwise, there will be a substantial administrative burden for marginal benefit. Our professionals and agencies need to be prepared for a different and challenging future, and our methods need to be fit for purpose from a whole of society perspective.

c