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Lyell Creek

Lyell Creek is situated in the Kaikoura zone between the Pacific Ocean and the Inland Kaikoura ranges. The catchment has a mild maritime climate and high sunshine hours with an average annual rainfall that ranges from 1,750mm in the headwaters to 844 mm near the coast. It is a lowland spring-fed river and has come under strong land-use pressure from a mixture of low and high producing grassland, with dairying and beef farming being the main activities.

Several sites on Lyell Creek and its tributaries that are included in the regional state of the environment (SoE) long term monitoring programme represent spring-fed rivers. Increasing pressure is being placed on Lyell Creek by intensifying land-use and increased demand for rights to take water for uses including irrigation and urbanisation.

The best water quality is in the upper reaches of the creek where there has been less change to the catchment and less human activity; consequently there is low level nutrient enrichment. The poorest water quality is found closer to the coast where the waterway is under pressure from land-use activities. Intensive agriculture in this area means higher nutrient concentrations, high bacteria concentrations and poor ratings for factors that support aquatic life, such as dissolved oxygen.

Sites 4

Monitored sites in the Lyell Creek catchment

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Scientific Indicators
Scientific data for this catchment

This dashboard shows information on the data collected by the regional councils for water quality indicators, analysed as state and trend.

The state for the catchment is represented by the median concentration for the parameter across all sites within the catchment and then compares that value to the quartiles for all monitored sites in New Zealand.

Click on the parameters state icons to compare this catchment with others in the region.

  • State

    State shows how the median of samples from this site compares to other sites

  • Trend

    Trend shows how the quality of water is changing over time. Depending on the sampling history duration, five and ten year timescales are available:

Can I trust this data?

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.

Can I trust the data?
Data Collection

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.

State

All samples were collected using approved field protocols and have been analysed in accredited laboratories. Therefore the data shown here can be trusted.

Trend - Adjustment for flow

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.

Bacteria

E. coli
State
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Trend
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Clarity

Clarity

Black disc
State
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Trend
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Clarity

Turbidity
State
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Trend
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Nitrogen

Nitrogen

Total Nitrogen
State
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Trend
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Nitrogen

Total Oxidised Nitrogen
State
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Trend
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Nitrogen

Ammoniacal Nitrogen
State
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Trend
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Phosphorus

Phosphorus

Dissolved Reactive Phosphorus
State
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Trend
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Phosphorus

Total Phosphorus
State
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Trend
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Download Data

.ZIP file of indicator readings for all sites in New Zealand
Download
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