Monitored sites in the Rakaia River Catchment catchment
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For much of its journey, the river is a braided, running through the wide shingle bed. Close to Mount Hutt the river is briefly confined to a narrow canyon known as the Rakaia Gorge. The river supports a large wrybill population which represents 73% of the total population. Other important bird species known to be found in the Rakaia riverbed are Black Fronted Tern and Banded Dotterel.
Two sites are monitored in the Rakaia River as part of the Environment Canterbury's state of environment monitoring programme. These sites represent upper and lower reaches of alpine-fed rivers.
The upper reach has good water quality with low level dissolved nutrient concentrations, low levels of bacteria and good aquatic life supporting parameters (temperature and dissolved oxygen). The lower reach is also of good water quality, but with slightly higher dissolved nutrient concentrations and bacteria (although still at low levels). This is most likely a result of cumulative land use effects with significant dilution from the alpine-fed river water.
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This dashboard shows information on the data collected by the regional councils for water quality indicators, analysed as
The state for the catchment is represented by theconcentration for the across all sites within the catchment and then compares that value to the for all monitored sites in New Zealand.
Click on the parameters state icons to compare this catchment with others in the region.
State shows how theof samples from this site compares to other sites
Trend shows how the quality of water is changing over time. Depending on the sampling history duration, five and ten year timescales are available:
The Cawthron Institute has worked alongside regional councils to verify the processes and methods used for data collection, laboratory analysis of samples collected and the statistical analysis and interpretation of the results presented.
If all Cawthron ticks are green, then you can trust this data. However, if one or more ticks are orange, then conclusions should be treated with some caution.
For more details on each tick, see our 'Can I Trust This Data?' Factsheet.
All samples were collected using approved field protocols and have been analysed in accredited laboratories. Therefore the data shown here has been collected and analysed following best practice.
All samples were collected using approved field protocols and have been analysed in accredited laboratories. Therefore the data shown here can be trusted.
This data is not flow adjusted. National guidelines suggest that flow-sensitive variables are flow 'adjusted' before trend analysis. Therefore, any trends shown here may be affected by variations in flow across sampling occasions.
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