| An environmental
flow is the water released for the primary purpose of maintaining
the health of the river system.
These flows are important to prevent the unnatural drying
of the river, and allows the aeration of water and flushing
of the river system. It also allows for the migration
of fish and provides habitat to instream fauna.
Since European settlement, our rivers and wetlands have
been used to store and deliver water for use when required.
Dams and infrastructure on waterways hold water and release
it on demand, changing the natural flow of many rivers.
In some cases the seasonal flow regime (or pattern) of
regulated rivers has been reversed to enable water to
be provided for water users when it is needed. These changes
have affected the health of our rivers and today, salinity,
increased algal blooms and a reduction in native plants
and animals are evident.
The provision of environmental flows, or water that is
allocated for environmental purposes aims to produce a
more natural flow regime to maintain biodiversity and
ecological functioning while protecting water quality.
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