We are currently developing our In-Site user training.

Our Approach

Urban stormwater design has traditionally focused on peak flows and pipe conveyance. Design standards have evolved and now require stormwater design to consider catchment changes created by urbanisation. Engineers Australia[1] now recommends the design and installation of volume management facilities as part of drainage design.

Stormwater design also needs to look after the needs of the site, the surrounding catchment infrastructure, and the receiving waterways.  Water Sensitive Urban Design (WSUD) promotes the sustainable use and re-use of water in urban planning and buildings.  This type of design integrates the water from all sources – including rainwater, stormwater, groundwater, mains water and waste water – into urban development and building design. WSUD measures and tools can be applied to residential, commercial and industrial developments and buildings. They include the storage, infiltration into the ground, treatment or use of stormwater runoff. Capture and use of stormwater run-off in urban areas has many social, economic and environmental benefits including:

    • Saving money and reducing potable water use where rainwater is applied to fit-for-purpose practices, such as in toilets, hot water, laundry washing and garden irrigation.
    • Creating greener and cooler urban environments with high visual amenity.
    • Reducing flood risk and damage.
    • Extending the useful life of existing Council stormwater infrastructure.

Developments must incorporate the three following volume management objectives. These three principles, and their respective design responses, must be targeted when considering the stormwater design options for a site.

Developments must target three volume management objectives.

[1] Adapted from Australian Rainfall and Runoff Guide – ARR 2016, Engineers Australia 2016, See Chapter 9 (Urban Drainage)

Quick Start Instructions

In addition to conveying stormwater in pipes, stormwater design should: Reduce the total Volume of runoff, manage peak Flows so as not to overwhelm local drainage networks, improve water Quality flowing into streams and coastal areas, and improve water Efficiency for drought resilience.

STEP 1: Please enter all impervious areas in your site connected to Council or Water Authority drains. Pervious paving, gravel and lawn areas can be excluded. Then enter any connected tank and WSUD treatments.

STEP 2: Press ‘Calculate’ and check which of the stormwater design criteria your project has passed.

STEP 3: Optimise your design by changing the impervious areas, tank sizes and treatments. Press ‘Calculate’ each time you make a change

For background reading on Integrated Urban Water Management, please see the following links:

Best Practice Sustainable Design in Planning:

Manningham Sustainable Urban Drainage Guide

IMAP – Sustainable Design Factsheets
IMAP 4.0 Stormwater Management.pdf
IMAP 3.0 Water Efficiency.pdf

WSUD Engineering Procedures Stormwater Stormwater eBook by Melbourne Water

Available on the Amazon.com.au Kindle Store

Other online resources

Melbourne Water Stormwater site

Technical Design Guidelines – Water by Design

RMIT Masters of sustainable practice Integrated Water Management course slides

2016 RMIT Integrated Water Management Course