Please note that this site is under construction, so results from calculators are not finalised. Results may change as the algorithms in this tool evolve and are refined over time.
The tool should be used in conjunction with the associated guideline and user manual:
About Water Sensitive SA
Water Sensitive SA is capacity building program that provides resources and training to assist practitioners to deliver best practice water sensitive urban design.
This tool provides a user friendly and technically robust method of assessing the performance of the proposed stormwater management and design elements of a development against the nominated performance criteria set out in the SA water sensitive urban design policy) and Council engineering requirements.
Visit the Water Sensitive SA website
We would like to thank the following people for their advice and technical support:
Melissa Bradley – Water Sensitive SA
Andrew Allan – Stormwater Australia
Dr Peter Coombes – Urban Water Cycle Solutions
Professor John Argue AO – University of South Australia
Baden Myers – University of South Australia
Nathan Wicker – NWDS / City of Port Adelaide Enfield
Peter Dillon – CSIRO
Andrew King – Stormwater SA / West Torrens City Council
Chris Beardshaw – Afflux consulting
Edmund Horun – RMIT University
Micah Pendergast – Melbourne Water
To begin please register and/or log in if you have not already. Registration is free.Register
To get started on project performance against design objectives, go to ‘My Projects’ in the top menu and then click on the ‘New Project’ button. Complete the three pages of the tool and submit it to be able to generate reports.
To generate reports go to ‘Reporting’ in the top menu. You can save a draft project, or return and edit or update a completed project at any time.
Ensure you save your changes using the ‘Save Draft’ button in the tool or the ‘Update’ button on the third page.
About InSite Water
InSite Water is designed and maintained by Ian Adams BEng(Env) MIEAust GSAP and the team at Organica Engineering. We are an independent engineering consultancy specialising in helping organisations and projects thrive on integrated water management and other sustainability opportunities. We are based in Melbourne, Australia. This site has been developed with the support of Water Sensitive SA, Manningham Council and Melbourne Water.
13 Feb 2019 – Changed post development runoff coefficient to align with development type. Non-residential developments will now require marginally larger storage volumes to meet the more stringent requirements for Commercial and Industrial drainage. Details:
The runoff coefficient is designed to align with the FLOW Performance objective in the ‘Guide’:
Guideline objective 2.1: Stormwater flow management performance measure – residential development
• Post development peak rate of runoff from the development site for the critical design storm shall not exceed that from the pre-development site from a 5-year ARI (0.2 EY) storm event.
• This option is automatically loaded if in the ‘New development type’ drop-down menu ‘Non-residential development’ is not selected.
Guidelines objective 2.2: Stormwater flow management performance measure – commercial, industrial and institutional development
• Post development peak rate of runoff from the development site for the critical design storm shall not exceed that from the pre-development site from a 20 year ARI (5% AEP) storm event.
• This option automatically loaded if in the ‘New development type’ drop-down menu ‘Non-residential development’ is selected.
Jan 2019 – Added the option to add permeable paving. The permeable paving area will now be counted as pervious surface, and as such will not generate stormwater in a small rain event (less than 1 in 5 years).