Contact Us


Wimmera CMA

Street Address:
24 Darlot Street, Horsham, 3400
(enter via Gleed St)

Postal Address:
PO Box 479, Horsham, VIC, 3402
Phone: (03) 5382 1544
Fax: (03) 5382 6076
Office Hours:
Monday to Friday, 8:30 - 5:00pm
(excluding Public Holidays and Christmas - New Year Closure.  Office may also be closed for short periods Monday mornings)

Flood Investigations and Flood Extent Maps

Flood investigations involve a detailed technical analysis of historic information to determine future flooding possibilities and their impacts. Community participation and ground-truthing are essential parts of investigations.

 Flow Gauge Board on Wimmera RiverFlow Gauge Board on Wimmera River

A flood investigation will determine the impacts of various flood intensities and often looks at possible options to reduce expected damages.

Dependent upon funding, an investigation may also help to determine actions to be taken by emergency service agencies during times of flooding, and often recommends flood-warning systems to improve community awareness to risks posed. Once a flood investigation is completed Wimmera CMA works closely with local government to amend planning schemes so that learnings from the investigation are incorporated and planning development is managed to the appropriate flooding risks identified.

Flow Modelling Study

Wimmera CMA has also completed a flow modelling study of the Wimmera River and Yarriambiack Creek between Glenorchy, Horsham, and Warracknabeal. The study undertook hydrologic and hydraulic modelling of the waterways; it was completed in September 2009. The study assessed both current and 'pre-European' catchment-waterway-floodplain regimes.

Flood and Flow Investigation Reports

The following flood and flow investigations have been completed:

Flood and Flow Extent Maps

AEP (Annual Exceedance Probability) Flood and Flow Event Extent Maps
Note: Wimmera CMA is not the lead agency to contact during a flood event.
You can find further information from: 

Please note that these maps are a lower resolution to enable quicker downloading. 
Find high resolution maps here.

Flood Map Locations

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AEP Flood and Flow Events

Beulah 2006 10% 5% 2% 1% 0.5%
Dimboola 2006 20% 10% 5% 2% 1% 0.5%
Dunmunkle 2016 - Boolite, Murtoa
and Upper Dunmunkle Creek
Glenorchy 2006 20% 10% 5% 2% 1% 0.5%
Halls Gap 2008 10% 5% 2% 1% 0.5%
Horsham 2002 20% 5% 2% 1%  0.5%
Jeparit 2008 20% 10% 5% 2% 1% 0.5%
Jeparit 2008 - no levee 20% 10% 5% 2% 1%  0.5%
Lower Wimmera 2016 - downstream
of Horsham 
Expected regional extent
Mount William Creek 2014 20% 10%  5% 2% 1%  0.5%
Natimuk 2013 20% 10% 5%  2% 1% 0.5%
Upper Wimmera 2014 20% 10% 5%  2% 1% 0.5%
Wimmera River & Yarriambiack Creek
2009 (inc. Horsham)
20% 10% 5% 2% 1% 0.5%
Yarriambiack Creek 2016 - Brim 20% 10% 5% 2% 1% 0.5%
Yarriambiack Creek 2016 -
20% 10% 5% 2% 1% 0.5%
Yarriambiack Creek 2016 - Jung
20% 10% 5% 2% 1% 0.5%

PLEASE NOTE: Maps are provided for general community information purposes only.
Flood levels and floor levels are determined from information available at a particular time and actual levels may exceed those shown. For information about flood conditions and restrictions affecting a particular property, contact Wimmera CMA or the relevant council. Neither Wimmera CMA nor the State of Victoria claim or warrant that the information in this map is accurate, complete or up to date, and neither Wimmera CMA nor the State shall be responsible or liable in respect of any use of or reliance placed on it by any person.

Flood Warning Network

Wimmera CMA has worked with emergency response agencies and the community to develop the Wimmera Flood Warning Network. The network consists of radio-telemetry equipment at existing river and rain gauges throughout the Wimmera, linked to the Bureau of Meteorology (BoM) and Wimmera CMA offices.  The information is then fed into computer based models that are used to predict the likelihood of flooding that may occur, the extent of the flooding and the timing so as to provide information to emergency services and the community through early warning messages.

The system is under constant review, with all flood investigations considering opportunities for network improvement.

You can find real-time information from these gauges on the BoM website.

Flood Project Updates

UPDATE: Warracknabeal and Brim Flood Investigation

Sep 01, 2016

Wimmera CMA and Yarriambiack Shire Council are seeking feedback from the community on the proposed Warracknabeal levee design and all draft reports produced by the Warracknabeal and Brim Flood Investigation (listed below);

Warracknabeal and Brim Flood Investigation - Flood Intelligence Report
Warracknabeal and Brim Flood Investigation - Flood Warning Assessment Report  
Warracknabeal and Brim Flood Investigation - Hydrology & Hydraulics
Warracknabeal and Brim Flood Investigation - Flood Mitigation Options

You can view a map of the levee height proposed for Warracknabeal below, as well as a map of the modelled one-in-100 year flood event extent if no levee is built.

Warracknabeal and Brim Flood Investigation - Proposed Levee Height Map
Warracknabeal and Brim Flood Investigation - No Levee 100 year Flood Extent


Please contact Wimmera CMA on (03) 5382 1544 or email to leave your feedback. Keep checking our website and Facebook page for information on upcoming community information sessions to present the proposed levee alignment, flood intelligence and mitigation option modelling. There is also a Facebook page specifically dedicated for updates and discussion about the proposed levee in Warracknabeal which you can view and like here

Alternatively, visit the Yarrambiack Shire Council website for additional information about the proposed levee and their contact information.

Proposed Levee Height Signs

Look out for these signs along the Yarriambiack Creek that will indicate the proposed location for the levee in Warracknabeal. Adjacent to each sign is a peg that shows the height of the proposed levee. 

  Warrack Levee Sign2