FLOOD WARNING SYSTEM
This brochure describes the flood
warning system operated by the Australian Government, Bureau of
Meteorology for the Tully-Murray Rivers. It includes reference
information which will be useful for understanding Flood Warnings and
River Height Bulletins issued by the Bureau's Flood Warning Centre
during periods of high rainfall and flooding.
Tully River at Kareeya
|Contained in this
document is information about:
(Last updated April 2014)
The Tully River catchment covers an area of 1475 square kilometres at Euramo. The Tully River is a relatively short stream, rising in high rainfall areas of the coastal ranges and flowing across the coastal plain. Floods in the Tully and the adjacent Murray River inundate cane lands and the larger floods isolate farm houses. An important impact of Tully River floods is the cutting of the Bruce Highway at Euramo.
The Tully River station at Euramo has a well documented history of flooding with records dating back to 1972. The figure below shows the significant flood peaks which have occurred at Euramo since records began. The 1967 peak was obtained by surveying a flood mark and has been included in the figure.
The Bureau of Meteorology operates a flood warning system for the Tully-Murray Rivers based on a rainfall and river height observations network shown on the map. The network consists of a number of volunteer rainfall and river height observers who forward observations by telephone when the initial flood height has been exceeded at their station, as well as a number of automatic telephone telemetry stations which are operated by the Bureau of Meteorology and the Department of Environment and Resource Management.
The Bureau's Flood Warning Centre issues Flood Warnings and River Height Bulletins for the Tully and Murray Rivers during flood events. Quantitative flood forecasts are issued when moderate flood levels are likely to be exceeded at Euramo. The objective is to provide 6 to 9 hour advanced warning of the river height. These warnings are updated up to 6 times per day throughout the flood event.
The Cassowary Coast and Tablelands Regional Councils are able to provide further information on flooding in your area of the Tully and Murray River catchments.
The Tully and Murray River ALERT system was installed in August 2001 by the (former) Cardwell Shire Council, with the assistance of the Bureau. It was funded through the Regional Flood Mitigation Program. The system consists of a network of rainfall and river height field stations which report via VHF radio to base station computers in the Council office at Cardwell and in the Flood Warning Centre in Brisbane.
The Tully River monitoring network has nine field stations - two which measure river height and rainfall, and seven which measure only rainfall; the Murray River monitoring network has three field stations - two which measure river height and rainfall, and one which measure only rainfall. These field stations send reports for every 1 millimetre of rainfall and every 50 millimetre change in water level.
The base station computer collects the data and has software that displays it in graphical and tabular form. The data is transmitted to the Bureau's Flood Warning Centre in Brisbane where it is used in hydrologic models to produce river height predictions during times of heavy rain and flooding.
The Bureau of Meteorology issues Flood Warnings and River Height Bulletins for the Tully and Murray Rivers, regularly during floods. They are sent to radio stations for broadcast, and to local Councils, emergency services and a large number of other agencies involved in managing flood response activities. Flood Warnings and River Height Bulletins are available via :Radio
These include the Councils, Police, and State Emergency Services in the local area.
Internet/World Wide Web
Flood Warnings, River Height Bulletins and other weather related data is available on the Bureau's Web page at http://www.bom.gov.au . The Queensland Flood Warning Centre website is http://www.bom.gov.au/qld/flood/ .
Flood Warnings are available through a recorded voice retrieval system, along with a wide range of other weather related and climate information.
|Main Directory||Phone||1900 955 360|
|Flood Warnings||Phone||1300 659 219|
Telephone Weather Services Call Charges:
1900 numbers: 77c per minute incl. GST; 1300 numbers: Low call cost - around 27.5c incl. GST.
(More from international, satellite, mobile or public phones)
Flood Warnings and River Height Bulletins contain observed river heights for a selection of the river height monitoring locations. The time at which the river reading has been taken is given together with its tendency (e.g. rising, falling, steady or at its peak). The Flood Warnings may also contain predictions in the form of minor, moderate or major flooding for a period in the future. River Height Bulletins also give the height above or below the road bridge or causeway for each river station located near a road crossing.
One of the simplest ways of understanding what the actual or predicted river height means is to compare the height given in the Warning or Bulletin with the height of previous floods at that location.
The table below summarises the flood history of the Tully-Murray River basin - it contains the flood gauge heights of the more significant recent floods.
|River hieght station||Bolinda Estate||Euramo||Upper Murray||Murray Flats|
Historical flood heights for all river stations in the Tully-Murray Rivers floodwarning network, as shown on the map, are available from the Bureau of Meteorology upon request.
TULLY RIVER CATCHMENT - ASSESSMENT OF THE FLOOD POTENTIAL
Major flooding requires a large scale rainfall situation over the Tully and Murray River catchment. The following can be used as a rough guide to the likelihood of flooding in the catchment:
Average catchment rainfall in excess of 200mm in 24 hours may result in stream rises and the possibility of moderate to major flooding developing in the lower reaches of the Tully River around Euramo and extending downstream to the Tully River and Murray Flats delta area.
Average catchment rainfall in excess of 300mm in 24 hours is likely to result in significant stream rises with major flooding causing closure of the Bruce Highway near Euramo and along the Murray flats.
At each flood warning river height station, the severity of flooding is described as minor, moderate or major according to the effects caused in the local area or in nearby downstream areas. Terms used in Flood Warnings are based on the following definitions.
|Minor Flooding :
Causes inconvenience. Low-lying areas next to watercourses are
inundated. Minor roads may be closed and low-level bridges submerged.
In urban areas inundation may affect some backyards and buildings below
the floor level as well as bicycle and pedestrian paths. In rural areas
removal of stock and equipment may be required.
Moderate Flooding :In addition to the above, the area of inundation is more substantial. Main traffic routes may be affected. Some buidlings may be affected above the floor level. Evacuation of flood affected areas may be required. In rural areas removal of stock is required.
Major Flooding :In addition to the above, extensive rural areas and/or urban areas are inundated. Many buildings may be affected above the floor level. Properties and towns are likely to be isolated and major rail and traffic routes closed. Evacuation of flood affected areas may be required. Utility services may be impacted.
Each river height station has a pre-determined flood classification which details heights on gauges at which minor, moderate and major flooding commences. Other flood heights may also be defined which indicate at what height the local road crossing or town becomes affected by floodwaters.
The table below shows the flood classifications for selected river height stations in the Tully and Murray River catchment.
River Height Station
First Report Height
Minor Flood Level
Crops & Grazing
Moderate Flood Level
Towns and Houses
Major Flood Level
|Murray Flats||-||8.5 (A)||7.0||-||7.5||-||8.0|
The above details are correct at the time of preparing this document. Up-to-date flood classifications and other details for all flood warning stations in the network are at:
For the latest rainfall and river height conditions please use the following link:
For the latest rainfall and river height network map please use the following link:Network maps
For further information, contact:
The Regional Hydrology Manager, Bureau of Meteorology, GPO Box 413, Brisbane Q 4001