Rainfall and Flood Map - additional notes

Flood Warning Maps and Data

The data is provided for flood warning purposes and not all data will be available outside flood periods.

Some of the data is provided to the Bureau of Meteorology by other agencies. Separate approval may be required to use the data for other purposes.

The rainfall and river data shown in these products includes real-time operational data from automated telemetry systems and has not been quality controlled. Some of the data are the result of interpolation of observations reported at irregular time intervals. Rain gauge calibration test data may appear as rainfall on dry days.

The mapping information in some products is supplied via Geoscience Australia.

River Height Plots

River height plots provide a graphical view of recent observations at a station. The data has been collected in real time either by polling the station or by the station reporting the data on its own by radio transmission. This plot brings together all the data received over the last 4 or 7 days (this varies according to how quick the river behaviour is). The data is extracted from the database and filtered to remove some bad data. This filtering of bad data is not comprehensive.

The plots also show some details of the station at the top. They also show, where available the flood class levels. These are explained in detail in Flood Classifications. These levels provide a general understanding of the impact of expected flooding and the flood risk faced. Generally, Flood Warnings are issued when the river heights exceed the minor flood level.

River Height Series

River height series table provides a tabular view of recent observations at a station. The data has been collected in real time either by polling the station or by the station reporting the data on its own by radio transmission. This plot brings together all the data received over the last 4 or 7 days (this varies according to how quick the river behaviour is). The data is extracted from the database and filtered to remove some bad data. This filtering of bad data is not comprehensive.

The tables also show some details of the station at the top. They also show, where available the flood class levels. These are explained in detail in Flood Classifications. These levels provide a general understanding of the impact of expected flooding and the flood risk faced. Generally, Flood Warnings are issued when the river heights exceed the minor flood level.

Latest River Heights

Latest River Heights is a table of river height observations for selected locations. Each table shows the data for a collection of river basins. The States and the Northern Territory are divided up to several such collections for easy viewing. They show the latest available river height observation and the time the observation was made.

River heights are measured at selected locations throughout Australia. This information will help understand how a river is rising and falling, and which sites are exceeding flood threshold levels or other key heights such as a bridge or a causeway (culvert). Especially during floods, this gives some understanding of how high the water is above such crossings. The Flood Class is a classification of impacts from possible flooding. These are explained in detail in Flood Classifications. These levels provide a general understanding of the impact of expected flooding and the flood risk faced. Generally, Flood Warnings are issued when the river heights exceed the minor flood level.

The Latest river heights table list the latest observations available for river height stations. If no data has been received within a given window, the station will not be shown.. These observations may be from manual or automatic river height gauges. Some data checking is performed on the data, however it is still possible for bad data to appear. Care should be taken in using the tendency field in the Latest River Heights table, which tells whether the river is rising, falling or remaining steady at that time as it is often based on just the last few readings, and may not be completely representative of the true trend of the river.

River height data collection

River height data collection has been going on for over a hundred years. River height data are obtained from different types of observing stations around Australia. They include manual reading of staff gauge, automatic recording stations which communicate to a base either via radio or the telephone lines. This data is used for a variety of purposes, including flood warning, water resources and also for recreational use.