River Health
While devastation to the land is a highly visible consequence of fire, rivers are also affected because surrounding catchment condition is critical to river health.
The immediate impact of the fires themselves may appear to be minimal, however there are several key ways in which stream ecosystems can be affected by fires. These include changes in flows, sedimentation from soil and ash, and algal blooms from increase nutrients from sediments and less shade from vegetation.
The biggest issue can often be not the severity of the fire but by whether heavy rains followed, washing large amounts of ash and sediment into the river, and whether the fire left unburnt areas that allowed river life to take refuge and recolonize
ACTIONS
Water quality
After a fire, ash and soil from paddocks with inadequate groundcover may be blown into dams causing poor water quality for stock. Once in the water, organic materials provide ideal food for bacteria and algae.
ACTIONS
1 |
Consider getting your dam water tested |
2 |
Aerate dam water if required |
3 |
Set up silt traps around dams |
FURTHER INFORMATION
In 2009, the Department of Primary Industries (DPI) produced a report called ‘Recovery after fire. Practical steps for landholders’. This document covers many topics and may be useful