Lake Water Quality for Swimming Categories [Raw Model Output]

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Creative Commons Attribution 4.0 International

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641
7
Added
27 Jun 2018

This dataset was first added to MfE Data Service on 27 Jun 2018.

Water quality for swimming categories for lakes with perimeters over 1.5 km. This dataset was used to compose the current state for water quality for swimming.

Note this data is under review and will be updated in due course. This information is based on modelled and measured data using the approach outlined at
www.mfe.govt.nz/fresh-water/freshwater-management-...

The modelling methods used are outlined in Snelder et al. (2016) Strategic assessment of New Zealand’s freshwaters for recreational use: a human health perspective. LWP Client Report 2016-011 www.mfe.govt.nz/publications/fresh-water/strategic...

Versions

This dataset is the geometric version of this: data.mfe.govt.nz/table/53620-river-water-quality-f...

This dataset has now been superseded due to consultation with local authorities, and this is the latest version: data.mfe.govt.nz/layer/95555-river-water-quality-f...

Column headings:

LID: FENZ Lake ID

Name: Name of lake (where available

RC: Regional council name

CHLA: Chlorophyll a (mg/L)

SECCHI: Secchi disc depth (m)

TLI3: Trophic Level Index (unitless)

TN: Total nitrogen (mg/m3)

TP: Total phosphorus (mg/m3)

CyanBVl: Cyanobacterial biovolume (mm3/L)

Cy_cat: Water quality for swimming category see www.mfe.govt.nz/fresh-water/what-government-doing/...

Note: blank cells are reaches where a prediction was not possible because of missing predictor variables.

Layer ID 95561
Data type Vector multipolygon
Feature count 3801
Services Vector Query API, Web Feature Service (WFS), Catalog Service (CS-W)

Nitrogen leaching trend statistics xlsx

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Creative Commons Attribution 3.0 New Zealand

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You must attribute the creator in your own works.

417
134
Added
07 Oct 2015

This item was first added to MfE Data Service on 07 Oct 2015

Document ID11459
File namenitrogen-leaching-trend-statistics-xlsx.xlsx
TypeXLSX
Size12.4 KB

Te Arawa Lakes Trust Cultural Monitoring Datasheet 2016

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Creative Commons Attribution 3.0

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You must attribute the creator in your own works.

468
14
Added
30 Apr 2017

This item was first added to MfE Data Service on 30 Apr 2017

The dataset underlying the report "Te Arawa Lakes Trust fresh water management project: six monthly report from 1 January to 30 June 2016". Available from www.mfe.govt.nz at www.mfe.govt.nz/publications/fresh-water/te-arawa-....

Document ID12904
File namete-arawa-lakes-trust-cultural-monitoring-datasheet-2016.xlsx
TypeXLSX
Size16.4 KB

raw_data_for trends_NGMP

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Creative Commons Attribution 3.0 New Zealand

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409
36
Added
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.

Document ID11708
File nameraw_data_for-trends_ngmp.csv
TypeCSV
Size2.37 MB

Update of National Groundwater Quality Indicators: State and Trends_results

Licence

Creative Commons Attribution 3.0 New Zealand

You may use this work for commercial purposes.

You must attribute the creator in your own works.

370
44
Added
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.

Document ID11710
File nameupdate-of-national-groundwater-quality-indicators-state-and-trends_results.xlsx
TypeXLSX
Size3.81 MB

Update of National Groundwater Quality Indicators: State and Trends_metadata

Licence

Creative Commons Attribution 3.0 New Zealand

You may use this work for commercial purposes.

You must attribute the creator in your own works.

373
16
Added
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.

Document ID11709
File nameupdate-of-national-groundwater-quality-indicators-state-and-trends_metadata.xlsx
TypeXLSX
Size437 KB

River water quality, state, 2013–2017

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Creative Commons Attribution 4.0 International

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You must attribute the creator in your own works.

398
54
Updated
15 Apr 2020

This dataset was last updated on MfE Data Service on 15 Apr 2020.

16 April 2020: Subsequent to publication in April 2019 we discovered two small errors with this dataset. These included:

  • Errors in the coordinates of some sites and their associated metadata (such as landcover and elevation).
  • Errors in our calculation of dominant landcover.

In addition, flow data from TopNet has also been updated.

These changes have a minor impact on overall results. These changes have have been corrected, and are republished here, as part of the Our freshwater 2020 release.

This dataset contains ten parameters of water quality based on measurements made at monitored river sites:

  • Nitrate-nitrogen
  • Ammoniacal nitrogen
  • Ammoniacal nitrogen (adjusted)
  • Total nitrogen
  • Total phosphorus
  • Dissolved reactive phosphorus
  • Water clarity
  • Turbidity
  • Escherichia coli
  • Macroinvertebrate community index

This dataset includes:

  • Median values for the period 2013 to 2017
  • for selected indicators, how these values compare to the National Objectives Framework (NOF) (MfE, 2017) bands related to ecosystem health and human health for recreation, and to expected concentrations in natural conditions, as shown by the default guideline values in the Australian and New Zealand guidelines for fresh and marine water quality (ANZG, 2018)

More information on this dataset and how it relates to our environmental reporting indicators and topics can be found in the attached data quality pdf.

Summary report available at www.mfe.govt.nz/publications/fresh-water/water-qua....

Table ID 99867
Data type Table
Row count 7988
Services Web Feature Service (WFS), Catalog Service (CS-W), data.govt.nz Atom Feed

Nitrate leaching from livestock time series 1990–2017 data quality

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Creative Commons Attribution 4.0 International

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You must attribute the creator in your own works.

165
32
Added
16 Apr 2019

This item was first added to MfE Data Service on 16 Apr 2019

3
Document ID21936
File namenitrate-leaching-from-livestock-time-series-19902017-data-quality.pdf
TypePDF
Size732 KB

Nitrate leaching from livestock time series 1990–2017 raw data

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Creative Commons Attribution 4.0 International

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162
41
Added
16 Apr 2019

This item was first added to MfE Data Service on 16 Apr 2019

Document ID21937
File namenitrate-leaching-from-livestock-time-series-19902017-raw-data.csv
TypeCSV
Size53.4 KB

Nitrate leaching from livestock 2017 data quality

Licence

Creative Commons Attribution 4.0 International

You may use this work for commercial purposes.

You must attribute the creator in your own works.

179
23
Added
17 Apr 2019

This item was first added to MfE Data Service on 17 Apr 2019

2
Document ID21962
File namenitrate-leaching-from-livestock-2017-data-quality.pdf
TypePDF
Size357 KB
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