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You are here: Home Resource Finder Journal Article Monitoring to detect changes in water quality to meet policy objectives
Monitoring to detect changes in water quality to meet policy objectives
January 2024
Publication: Scientific Reports
Author(s): R. W. McDowell, A. Noble, M. Kittridge, O. Ausseil, C. Doscher, D. P. Hamilton
Detecting change in water quality is key to providing evidence of progress towards meeting water quality objectives.
A key measure for detecting change is statistical power.
Here we calculate statistical power for all regularly (monthly) monitored streams in New Zealand to test the effectiveness of monitoring for policy that aims to decrease contaminant (phosphorus and nitrogen species, E. coli and visual clarity) concentrations to threshold levels in 5 or 20 years.