Monitored sites in the Orari River Catchment catchment
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The Orari River catchment has a temperate climate, characterised by warm, dry summers and cool winters. The upper catchment is a mixture of exotic vegetation and grassland/tussock with low intensity landuse activities. The lower plains are under moderate-to-high landuse pressures from such activities as pastoral beef and sheep, dairying and cropping.
Several sites are monitored on the Orari River and tributary streams as part of Environment Canterbury’s state of environment monitoring programme. The sampling site locations are representative of hill-fed, lower spring-fed plain river types.
Water quality data indicates increased demands for water and the effects of increasing agricultural activities are putting pressure on the water quality and aquatic ecosystem values of the River. The best water quality is observed in the upper reaches of the Orari catchment where little degradation and anthropogenic activity occurs. Water quality of the upper catchment is characterised by low levels of dissolved nutrients and bacterial concentrations. The poorest water quality is typically found closest to the coast where the river and tributary streams have been under pressure from increasing landuse intensification, both rural and urban. As the river flows down the plains towards the coast, dissolved nutrient levels and bacterial concentrations increase.
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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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