The indicators that are measured in the Little Para River are
nutrients (nitrogen and phosphorus), turbidity and salinity.
The concentrations of these indicators are used to classify the
water chemistry as being in good,
moderate or poor
condition, according to the needs of aquatic ecosystem protection.
Water chemistry classification for October 2005 to March 2006
|
Indicator
|
Classification
|
|
|
Poor
|
|
|
Poor
|
|
|
Good
|
|
|
Moderate
|
|
|
Good
|
The amount of nitrogen or phosphorus can increase as a result
of fertilisers or animal wastes entering the river during storms.
The poor nitrogen results for the recent samples are consistent
with previous results. Phosphorus levels are usually classified
as good. The oxidised nitrogen levels in the Little Para River
have tended to peak during warmer months, which can lead to excessive
algal growth. It is likely that dry conditions cause reduced flows
in the river, which contribute elevated nitrogen concentrations,
which can lead to excessive algal growth.
Water chemistry classification for April to September 2005
|
Indicator
|
Classification
|
|
|
Poor
|
|
|
Poor
|
|
|
Good
|
|
|
Good
|
|
|
Good
|
The amount of nitrogen can increase as a result of fertilisers
or animal wastes being washed off farms during storms or due to
effluent outfalls. The poor nitrogen results for the recent samples
are consistent with previous results.
