Update of National Groundwater Quality Indicators: State and Trends December 2004-2013


Creative Commons Attribution 3.0 New Zealand

You may use this work for commercial purposes.

You must attribute the creator in your own works.

19 Oct 2015

This item was first added to MfE Data Service on 19 Oct 2015

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
- percentiles
- 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.
- Spreadsheet2_NGMP_results
- Spreadsheet1_NGMP_metadata
- raw_data_for trends_NGMP.


Technical Details
Document ID11707
File Nameupdate-of-national-groundwater-quality-indicators-state-and-trends-december-2004-2013.pdf
File size1.96 MB
AddedOct. 19, 2015
Current revisionCreated on Oct. 19, 2015 from CR 2015-16 Update of National GW Quality State and Trends.pdf.