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Technical reports

Technical reports

Updated 17 November 2020 12:18pm

Ecological health of rivers and streams in the Wellington Region


Ecosystem health in Wellington City urban streams and supplementary data report

Presents results of baseline ecosystem health monitoring for open and piped streams within Wellington City



Low flow patterns in the Ruamahanga River catchment: 1975-2015


Groundwater Nitrate Trend Analysis Report for data collected between 2003-2006


Toxic algae summary report

Toxic Algae in Wellington Region Rivers (2016) (PDF, 2MB) provides a summary of the technical report listed below. It outlines a decade of monitoring and research on toxic algae in the Wellington Region. This information will help inform decision-makers on how to manage toxic algae in the future.





Benthic cyanobacteria full report

Benthic cyanobacteria blooms in rivers in the Wellington Region (2016) (PDF, 3.6MB) presents a comprehensive analysis of monitoring and research carried out over the last 10 years to better understand benthic cyanobacteria (toxic algae) blooms in rivers in the Wellington Region and the environmental factors that contribute to them.



LakeSPI results for the four lakes in the Wellington Region (PDF, 8MB) details an assessment undertaken in 2016 of the submerged plant values in Lakes Kohangapiripiri, Kohangatera, Pounui and Waitawa using the LakeSPI methodology.


Use of periphyton cover to estimate chlorophyll a concentration (PDF, 1.24MB) summarises the results of a study undertaken to assess when visual assessment of periphyton cover can be reliably used in place of measurement of chlorophyll a for monitoring compliance with Greater Wellington Regional Council’s Proposed Natural Resources Plan periphyton outcomes and the National Policy Statement for Freshwater Management periphyton attribute.


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