Monitored sites in the Conway River catchment
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The upper reaches of the Conway River catchment are dominated by native vegetation, and the middle and lower reaches are mainly used for beef and sheep finishing, cropping and dairying. Two sites are monitored routinely on the Conway River for water quality as part of Environment Canterbury’s state of environment (SoE) monitoring programme. Another site, on the Charwell River has been monitored in the past. These sites represent upper and lower reaches of hill-fed rivers.
Increasing pressure is being placed on the Conway by intensifying land-use and increased demand for water supplies. Lowland areas are the worst affected. The best water quality is often found in the upper reaches of the Conway where there has been less change to the catchment and less human activity. The poorest water quality is typically found at sites nearer the coast where waterways are under pressure from increasing land-use intensification.
The upper reaches of the Conway River have high water quality and low concentrations of nutrients and bacteria. This is typical of alpine / hill-fed rivers dominated by natural vegetation. In the lower reaches nutrient concentrations and bacterial indicators increase. Sources of bacterial contamination are likely to include the effects of intensive land-use in the middle catchment area and birds living in the riverbed. The bacterial quality of the river at State Highway 1 is often poor during summer, which reduces the recreational value of the river.
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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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