Flooding and Stormwater Management

E2 Design Pty Ltd, trading as E2Designlab, has been appointed to assist us in developing Manningham’s Integrated Water Management Strategy.

An increasing population and changing climate are putting growing pressure on our water supplies.

This strategy will review flooding and stormwater management risks and respond to emerging challenges, including:

• population growth
• the forecast for reducing annual average rainfall moving forward;
• increasing flood and drought risk.

It will identify opportunities to reduce reliance on potable water, harness alternative water sources and contribute to planning for a resilient and liveable Manningham.

E2Designlab will assist with data gathering to:

• inform integrated water management targets for Manningham
• undertake investigations into potential integrated water management capital works improvements
• provide technical advice, identify and assess opportunities to inform the development of an action plan.

At its June meeting, Council endorsed a revised version of the Integrated Water Management Strategy Implementation Plan, including the following changes:

• referral of some actions to now be addressed though the development of the proposed Stormwater Management Strategy.
• updated reflection of State Government planning to advance Integrated Water Management in Victoria and the Yarra catchment including the recently received transition report.
• updates to the project communications approach and program.

We are also working alongside the Flooding and Stormwater Management Community Reference Panel (CRP) in the development of the strategy. The CRP has recently contributed to identifying and prioritising drivers for integrated water management for Manningham.

Once finalised, the drivers will guide the CRP and Council in developing a draft vision for integrated water management in Manningham.

The draft Integrated Water Management Strategy will be publicly exhibited in mid-2024, before final adoption early in 2025.

The fourth meeting of the Flooding and Stormwater Management Community Reference Panel (CRP) was held on 31 May 2023.

The CRP is helping to guide the development of the Manningham Flood Mapping Project and Integrated Water Management Strategy.

Summary of Flooding and Stormwater Management CRP Meeting 4 minutes:

• The focus of the meeting was on responding to questions previously raised by community members.
• Key differences between the previous and current flood mapping projects were presented, as well as a briefing on land use planning.
• Officers advised that it is proposed to develop a Flood (Stormwater) Management Strategy in parallel with the flood mapping and development of the Integrated Water Management Strategy. This strategy is proposed to be reviewed once the newly mapped flood extents have been developed.
• The CRP was also advised that:
  1. Afflux consulting was appointed to progress the local catchment flood mapping.
  2. Council would consider the updated Integrated Water Management Strategy Implementation Plan at its June meeting.

All meeting minutes will be available on the Your Say Manningham Flooding and Stormwater Management page.

More information

• Flooding and Stormwater Management Community Reference Panel Meeting 4 - Minutes
• Manningham Flood Mapping Project FAQs
• Integrated Water Management Strategy FAQs

The third meeting of the Flooding and Stormwater Management Community Reference Panel (CRP) was held on 29 March 2023.

Together with the CRP, we’re working to better understand and address increasing challenges to water management, including climate change, development pressure and population growth.

The CRP is helping to guide the development of the Manningham Flood Mapping Project and Integrated Water Management Strategy.

Summary of Flooding and Stormwater Management CRP Meeting 3 minutes:

• Luke Cunningham of Rain Consulting Pty Ltd delivered a presentation on ‘Flood Modelling Methodology and Mapping’, followed by a Q&A session.
• Feedback was sought from the Panel on the best ways for Council to communicate and engage with our diverse community on these complex issues.
• A range of questions were raised relating to:
  • how the current project differs from the previous flood mapping project
  • how the flood mapping will consider climate change impacts
  • questions around a potential Planning Scheme Amendment; and,
  • other matters.
• These questions will be addressed at the May 2023 Community Reference Panel meeting.

All meeting minutes will be available on the Your Say Manningham Flooding and Stormwater Management page.

More information

• Flooding and Stormwater Management Community Reference Panel Meeting 3 – 29 March 2023 - Minutes
• Manningham Flood Mapping Project FAQs
• Integrated Water Management Strategy FAQs

Afflux Consulting Pty Ltd has been awarded the Manningham Flood Mapping contract. The project scope includes the modelling and mapping of flood extents, flow depths and velocities for Council extents for a range of scenarios.

The Manningham Flood Mapping Project is being delivered by Manningham Council and Melbourne Water. This project will provide maps indicating flood extents for the regional and local drainage networks in Manningham. The flood mapping process will also be informed by the latest available data and guidance recommended under the 2019 version of Australian Rainfall and Runoff.

Current and reliable flood mapping information is essential to understand and manage flood risk. It can be used to:

• assess the frequency, severity and location of flood risks within catchments
• better plan and prioritise mitigation activities
• plan for future development
• build community awareness; and
• inform emergency management planning.

Melbourne Water has appointed Jacobs consultants to undertake flood mapping for the regional flood extents.

We are working alongside the Flooding and Stormwater Management Community Reference Panel (CRP) in the development of the flood mapping.

Modelled flood extents will be publicly exhibited late in 2024.

We’re inviting the community to help prepare for Manningham’s future by sharing how you use and conserve water, and why it’s important to you via ‘Manningham's water future’ survey.

Take the survey

We rely on water for our personal health and household needs, as well as for creating and sustaining the ecosystems. It's integral to food production, energy, health and wellbeing, economic activity, social stability and human life.

Southern Australia is forecast to receive less annual rainfall, reducing water availability from water supply catchments and increasing drought risk.

Conversely, the changing rainfall patterns are also anticipated to bring greater intensity rainfall events, which will increase flood risk.

Your responses will help us better understand community views, priorities, needs and expectations relating to Manningham’s water. We will also use this information to inform how we engage with and deliver information to you on water matters in the future.

We’re undertaking various flood and stormwater management initiatives, aimed at building a more resilient and liveable Manningham. Part of this work includes developing a draft Integrated Water Management Strategy, which will be available for public exhibition in mid-2024. This strategy will respond to emerging water risks and challenges and identify opportunities to adapt to a more water constrained future

The survey closes 5 June 2023. You will have the opportunity to enter the draw to win a $100 Westfield gift voucher.

Help us prepare for the City's future by telling us how you use and conserve water and why it’s important to you.

Survey opens 24 April 2023.

The Flooding and Stormwater Management Community Reference Panel (CRP) held its second meeting on 15 December 2022.

Together with the CRP, we’re working to better understand and address increasing challenges to water management arising from climate change, development pressure and population growth.

This meeting focused primarily on undertaking some preliminary work, which will help guide our approach in developing the Integrated Water Management Strategy.

The CRP was tasked to identify and prioritise drivers for integrated water management for Manningham. This list will be further refined by the CRP at upcoming meetings, with consideration of other stakeholder feedback.

Once finalised, the drivers will guide the CRP to develop a draft vision for integrated water management in Manningham.

The CRP will help guide the development of the Manningham Flood Mapping Project and Integrated Water Management Strategy.

All meeting minutes will be available on the Your Say Manningham Flooding and Stormwater Management page.

Flooding and Stormwater Management Community Reference Panel Meeting 2 - 15 December 2023 - Minutes

The next meeting will be held on Wednesday 29 March 2023.

The newly appointed Flooding and Stormwater Management Community Reference Panel (CRP) held its first meeting on 9 November 2022.

Together with the CRP, we’re working to better understand and address increasing challenges to water management, including climate change, development pressure and population growth.

The CRP will help guide the development of the Manningham Flood Mapping Project and Integrated Water Management Strategy.

Summary of Flooding and Stormwater Management CRP Meeting 1 minutes:

• Cr Stephen Mayne formally welcomed CRP members.
• The project team provided a project overview, covering the forecast impacts of climate change and population growth on water availability and flood risk.
• CRP members discussed the project scope, which includes flood mapping and the preparation of an Integrated Water Management Strategy for the city.
• CRP members agreed how they will work together, including role and responsibilities.
• CRP members worked in small groups to discuss what project success would look like.

All meeting minutes will be available on the Your Say Manningham Flooding and Stormwater Management page.

More information

• Flooding and Stormwater Management Community Reference Panel Meeting 1 - 9 November 2023 - Minutes
• Manningham Flood Mapping Project FAQs
• Integrated Water Management Strategy FAQs

The Minister for Planning has approved Corrective Amendment C137mann.

The purpose of the amendment was to correct Special Building Overlay 1 (SBO1), as it applies to properties in and around Hillcroft Drive, Templestowe.

Notice of the approval of Amendment C137mann appeared in the Government Gazette on 18 November 2022.

The revised SBO1 mapped area can now be viewed on the Department of Environment, Land, Water and Planning (DELWP) website.

More information

• Corrective Planning Scheme Amendment C137mann FAQs.
• Contact Manningham Council on 9840 9333, or at manningham@manningham.vic.gov.au

Warrandyte Uniting Church has a peace vision which in part focuses on engaging the community in ways to protect and care for our environment. In keeping with this vision, the church is leading a program around raingardens and caring for the earth.

A feature of the program is a newly constructed raingarden on the church grounds which was financially supported by Warrandyte Community Bank and Manningham Council.

The raingarden will divert and treat rainfall runoff from across the site as an example of what people can do in their own gardens.

Church project lead Ken Keam, said raingardens improve the quality of our waterways by filtering pollutants from stormwater and using stormwater to irrigate plants. They create habitat for local wildlife by promoting vegetation growth. By using stormwater for irrigation, they also conserve drinking water supplies.

“The project also aims to improve community understanding and knowledge about simple opportunities to preserve our natural environment and adapt to the impacts of climate change,” Ken said.

The program has included several information and interactive sessions for the local community and schools. Other contributors have included the Wurundjeri Woi Wurrung Cultural Heritage Aboriginal Corporation, as well as other local community groups and Melbourne Water.

Manningham Mayor, Cr Deirdre Diamante, said Council hoped the program would empower locals to consider how they can help build a resilient, liveable and sustainable future for Manningham.

“It’s great to see community members taking action to help secure our water future,” she said.

“Council is currently undertaking a number of flooding and stormwater management initiatives, aimed at building a more resilient and liveable Manningham and to facilitate robust planning for the future,” Cr Diamante said.

Ken also serves as a member on our recently formed Flooding and Stormwater Management Community Reference Panel. When asked about his interests in serving on the Panel, Ken said he is concerned about mitigating and adapting to the impacts of global warming.

“I hope that this opportunity will help to preserve the natural environment and liveability of this municipality by ensuring that the management of stormwater, as far as possible, encompasses the principles of Water Sensitive Urban Design, climate change adaption and community expectations,” he said.

More information