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There are five maps being updated in the Nillumbik area, reflecting the different sources of flooding. The information they provide will be used to plan for infrastructure, housing and emergencies.

Underway Watsons Creek
Underway Plenty River (Lower)
Underway Diamond Creek
Underway Stormwater drains
Underway Yarra River (Lower & Middle)

This work is being supported by Nillumbik Shire Council, as part of the Greater Melbourne Flood Information Program.

Thanks for your input

Thank you to everyone who shared their past experiences of flooding in Nillumbik Shire. Your contributions have been passed on to our flood modelling specialists, who will contact you if they have questions about the information you supplied.

Consultation for this stage of engagement has now closed. To be notified by email when the updated flood maps are available for your feedback, select the 'follow’ button at the top of this webpage.
Consultation ran from 4 to 24 August 2025. During this period:

Flooding was reported at the locations indicated below.

Map of Nillumbik Shire showing 13 locations where flooding was reported.

Next steps

Updating flood maps is a lengthy process that generally takes 12 to 18 months. Once this process is complete, we’ll share the updated maps for your review – so you can let us know if we’ve got them right before they’re finalised.

Diagram of steps involved in flood modelling program. Refer to table for a description.

Year Step Timeframe
1 Seek community experiences of past flooding and begin flood modelling Consultation: 1-2 months
1-2 Peer review of model and preparation of flood maps Planning: 12-18 months
2 Consult on updated flood maps and seek community feedback Consultation: 2 months
2-3 Review community submissions, validate and finalise flood maps Planning: 3-6 months
3 Publish final flood maps ready for use in decision making and request authorisation for Planning Scheme Amendment Publishing: 1 month
3 Publish updated flood emergency management plans Planning: 2 months

To learn more about what’s involved and how the information is used, visit our flood modelling webpage.

To receive email updates on our progress, select the ‘follow’ button in the banner at the top of this webpage.

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