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Water quality trend analysis functions for R

November 2021
The LWP-Trends library to undertake water quality trend analysis in the R statistical computing environment (updated 17 November 2021).

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Trend assessment guidance including worked examples

May 2021
Guidance for the analysis of temporal trends in environmental data including and R code and data for worked examples.

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Manawatū-Whanganui Region Catchment Nitrogen Models

March 2021
LWP Ltd and Streamlined Environmental Ltd collaborated to set up and calibrate catchment nitrogen models to assist with Regional Plan Change...

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State and Trends of River Water Quality in the Manawatū-Whanganui Region

January 2020
This study analysed the available river water quality data in the Manawatū-Whanganui Region. The report describes the state of water quality...

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Solutions assessment for Regional Water Plan Change

January 2020
Environment Canterbury worked with the Waimakariri zone committee over a number of years to develop a plan to manage water quality...

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Nitrogen allocation in the Hurunui catchment (Canterbury region) and its relevance for dryland farming

December 2018
This memo sets out the current state of nitrogen allocation in the Hurunui catchment in the Canterbury region.

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State and trends of river water quality in the Manawatū-Whanganui Region

December 2018
Analysis of river water quality state and trends for the Manawatū-Whanganui Region for the period up to 2017.

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Aggregating trend data for environmental reporting

December 2018
Methods for aggregating trend analyses performed on many sites to summarise broad-scale water quality changes.

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Predictive modelling of current and natural loads of nutrient and estimation of anthropogenic increases

October 2017
Predictive modelling of current and natural loads of nutrient and estimation of anthropogenic increases

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Consideration of proposed fencing rules in New Zealand with respect to contaminant generation at the national scale

September 2017
Consideration of proposed fencing rules in New Zealand with respect to contaminant generation at the national scale

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Water quality: related PDFs