Raw data, and state and trend calculations for key groundwater quality indicators, including nitrate-nitrogen, ammoniacal-nitrogen, dissolved reactive phosphorus, dissolved iron, dissolved manganese, total dissolved solids content, and electrical conductivity.
Statistics reported on include:
- median and median absolute deviation
- trend magnitudes
- statistical test p-values (from the Mann-Kendall trend test, Kruskal-Wallis test for seasonality, and sign-tests and Wilcoxon rank-sum tests for distribution differences).
The following report and spreadsheets relate to the "Ground water quality" measures on the Environmental Indicators, Te taiao Aotearoa website:
- Moreau M, Daughney C, 2015. Update of National Groundwater Quality Indicators: State and Trends December 2004-2013, GNS Science Consultancy Report 2015/16. 38 p.
- raw_data_for trends_NGMP.
|Must credit creator|
|File size||1.96 MB|
|Added||Oct. 19, 2015|
|Current revision||Created on Oct. 19, 2015 from CR 2015-16 Update of National GW Quality State and Trends.pdf.|