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Current state vs freshwater objectives (Report)

Description

Report describing concentrations and loads of nitrogen, phosphorus, sediment and Escherichia coli in New Zealand’s aquatic receiving environments and their comparison to national bottom lines

 

Date: 30 November 2023 Version: v2

Contact: Ton Snelder, LWP Ltd

 

Link to report / paper

Snelder TH, Whitehead AL, Fraser C, Larned, S, Schallenberg, M. (2020) Nitrogen loads to New Zealand aquatic receiving environments: comparison with regulatory criteria. New Zealand Journal of Marine and Freshwater Research 54:527–550

 

Preview Image

 

Dataset attributes

Spatial extent New Zealand
Spatial resolution
Temporal extent
Temporal resolution
Evaluation method (Validation)
Evaluation result (Numeric)
Evaluation result (Categorical)
Uncertainty method
Uncertainty data format (Numeric)
Uncertainty data format (Categorical)

 

Methodology

Based on spatial statistical models and a comparison of predicted concentration to criteria defined by the NPSFM for various nutrient related attribute target states for rivers and lakes and equivalent thereof for estuaries.

 

Fitness for purpose / limitations

This table indicates whether the dataset is suitable for different types of questions at different scales.

Note: Users should carefully consider their purpose as this dataset may not be suitable.

Operational Absolute Relative Screening/scoping
Block/farm No No No No
Multi-farms(5+) No No No No
Catchment Maybe Maybe Maybe Maybe
National/regional No No No No
Caveat(s) The study has used all the available data. Therefore, it would be difficult in most catchments to improve on the analysis. However, because the models were all national in extent, there may be a degree of model bias when the results are applied at fine scales.

Data and Resources