This indicator measures the average percentage of streambed covered by fine sediment for areas of smooth, unbroken water in hard-bottomed, wadeable streams and rivers, at 215 sites across six regions assessed at least bi-monthly for two consecutive years between 2014 and 2019.
Summary report available at www.mfe.govt.nz/publications/fresh-water/indicator....
More information on this dataset and how it relates to our environmental reporting indicators and topics can be found in the attached data quality pdf.
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This dataset reports modelled reference and current state of streambed deposited fine sediment at the REC1 stream segment scale. It provides predicted reference state from a boosted regression tree model trained on 1.) reference site data defined by land cover rules, 2.) all available deposited sediment. It also shows predicted current state trained on all available deposited sediment data.
See Clapcott & Goodwin (2017) for further information on the relevant model rules and data inputs.
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