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

Please note that these maps are a lower resolution to enable quicker downloading. 
High resolution 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: 

Flood Map Locations

year event

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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

Apr 24, 2017

A noisy chorus heralds the arrival of water in Dock Lake

After a wet winter and a wet start to spring, a noisy chorus of frogs and waterbirds are heralding the arrival of water into Dock Lake.

Mar 24, 2017

Update: Dunmunkle Creek Flood Investigation

The final community meetings for the Dunmunkle Creek Flood Investigation were held during March in Rupanyup, Boolite, Murtoa and Lubeck.