Stormwater Requirements for Developers
Stormwater Quantity (flood protection) requirements, including allowable discharge, pipe design, allowance for 1 in 100 year storm events are explained within Council’s design standard: Civil Design Requirements for Developers, Part A: Integrated Stormwater Management.
See the Engineering Assessments page for the relevant documents.
Stormwater Quality Contribution Payments
Stormwater Quality (pollution reduction) requirements, including Water Sensitive Urban Design standards are also documented within the above design standard. Kingston Council & Melbourne Water have launched flexible options for developers to meet stormwater quality management obligations, on all development applications other than 1 - 2 dwellings.
Developers can now apply to:
✓continue to provide stormwater treatment measures on-site, business as usual
✓ pay a fixed contribution towards Council managed off-site stormwater projects.
The stormwater quality contribution payment is based on the total impervious area within each development and can be estimated using our Stormwater Quality Contributions Calculator that allows applicants to calculate the likely contribution payment. If you would like to request a quote for the required stormwater quality in-lieu developer contribution payment - please click here.
For more details please see:
Integrated Water Cycle Strategy
The pressures that have been placed on the water cycle due to urbanisation are immense. In Kingston this has serious implications for water security, stormwater quality, flooding, groundwater quality, wastewater and waterway health.
In response, the Kingston's Integrated Water Cycle Strategy was developed in 2012. This strategy recognises that all elements in the water cycle are linked and considers the opportunities that are available to Council and the community, in order to ensure that we use water in a smarter way.
The strategy outlines the vision and steps required to achieve our goal of becoming a water sensitive city by 2040. See the Strategies and Plans page to find out how Council is currently using alternative water sources, and the projects we are undertaking to reach our goal of being a water sensitive city. This video below provides an overview of Council's approach and projects:
Kingston Council has implemented a broad range of rain garden projects within streetscapes, reserves and carparks over the last 10 years.
The video below gives an overview of Councils largest stormwater harvesting and reuse project at Edithvale Recreation Reserve
Watkins Reserve, Aspendale
In 2014, a large rain garden was integrated within the reserve as part of an integrated water quality and road renewal project, with the assistance of Melbourne Water’s Living Rivers program.
The viewing platform sits above an underground tank that provided added flood protection and reducing scouring previously caused by stormwater flowing across the adjacent beach.
Collins St, Mentone
19 attractive rain gardens were constructed as part of a road renewal project in 2010. This is one of our most popular stormwater treatment projects, featured in a number of local and international magazines, and demonstrates how rain gardens can be successfully integrated into an urban streetscape.
Stawell St, Mentone
Rain gardens in Stawell St were upgraded to our current design standard in 2008.
This design incorporates the use of attractive rocks, more interesting shapes, the use of exposed aggregate concrete paving abutting the kerb (to address parking concerns) and the subtle use of treated pine terracing to avoid steep grades.
Bear St, Mordialloc
Bear St was reconstructed in 2007 as a narrower curvilinear road. The layout specifically designed to create space within the nature strips for 5 rain gardens and a large 70m long bio-retention retarding basin.
The Bear Street bio-retention retarding basin has the multi-purpose function of reducing pollutant load, providing flood mitigation and enhancing the overall streetscape.
Warren Rd, Parkdale
Warren Rd was completely reconstructed in 2007 to upgrade the road pavement, address traffic issues and treat stormwater runoff.
The project incorporated an unusual rain garden within a kerb outstand using rock walls to minimise erosion. The treatment was designed to look as natural as possible and minimise maintenance.
Coleman Rd, Aspendale
The beach at Aspendale was suffering from erosion of the sand dunes and three unattractive stormwater outlets.
This project involved the construction of an attractive erosion control wall and the removal of the pipes by redirecting the stormwater runoff into soakage wells (primary treatment) and then into large bio-retention swales (secondary treatment).
Constructed during 2008 with funding assistance from the State Government.
What is a Rain Garden?
‘Rain Garden’ is the term commonly used to describe a vegetated area that removes pollutants from storm water runoff (also known as bio-retention systems). Rain water flows into a Garden bed and filters through a layer of engineered soil. The clean water is collected by slotted pipes and directed back into the traditional drainage system.
The surface traps litter, leaves and sediment whilst the soil (in combination with the plants root system) helps to filter and breakdown microscopic pollutants such as nutrients, heavy metals and hydrocarbons.
Rain gardens are designed to filter pollutants from frequent low intensity showers (catering for 95% of all storm water runoff). The traditional drainage system (pits and pipes) are still required to cater for larger infrequent storm events to prevent flooding.
Typical Section through a Rain Garden
Gross Pollutant Traps
Council has Gross Pollutant Traps (GPTs) throughout the municipality which require regular cleaning and maintenance. They are mostly located within road reserves or parks and won’t be obvious from the road surface however are instrumental in removing solid wastes from the drainage system prior to it entering creeks, rivers and the sea.
GPTs are structures, mostly concrete, that use physical processes to trap solid waste such as litter and coarse sediment. They are commonly used as the primary treatment because they mostly remove large, non-biodegradable pollutants.
Soakwells & Sump Pits
Council has installed various soakwells and sump pits through the municipality which require regular cleaning and maintenance. These treatments derive significant environmental benefits.
A soakwell is an underground tank/cells with angled holes in the side walls and base which allows water to seep away without causing damage to surrounding areas. Typically, rain water from a dwelling roof or impermeable ground area travels via storm water piping to a soakwell or underground tank, gently seeping into the surrounding soil.
The main purpose of the soakwell is to direct the stormwater into the soil where there may not be any underground stormwater drainage and provide an environmental benefit by returning the water into the ground. They rely on the soil to drain away the water provided the soil is sandy in nature.
A sump pit collects rubbish at the bottom of the pit to avoid rubbish entering the drainage pipes connected the pit. Generally the sump pit depth will be deeper than the lowest pipe exiting the pit.
How to Build a Rain Garden
‘Rain Garden’ is the term commonly used to describe a vegetated area that removes pollutants from storm water runoff (also known as bio-retention systems). A rain garden is similar to a regular garden bed, but it is specifically designed to capture stormwater from hard surfaces such as driveways, patios and roofs via downpipes - after it rains. Rain water flows into the garden bed and filters through a layer of engineered soil. The clean water is collected by slotted pipes and directed back into the traditional drainage system. This video gives an overview of how they work and includes some backyard landscaping designs: watch video.