Data

This dataset relates to the March 2018 report National E. coli modelling - Supplementary material to support setting draft regional targets for swimmable rivers.

Scenario 1 represents the level of stock exclusion and riparian planting for the nominal year 2030
when the CWP rules have been implemented assuming that the effects of the measures have been realised and water quality has attained a new attribute state. Scenario 1 also includes the impact of regional committed work (that is, work already committed to by councils in their policy plans, or planned infrastructure investment) in regions that have committed to mitigation beyond the CWP.

The geometries are based off REC1, and the field 'Swimability_band' defines the modelled E. coli attribute state NPS-FM human health for recreation value. The rest of the fields come from the River Environment Classification.

This dataset relates to the March 2018 report National E. coli modelling - Supplementary material to support setting draft regional targets for swimmable rivers.

It represents Scenario 0, baseline (i.e. 2017) including the current level of on-farm fencing and land use - further details available in the above report.

The geometries are based off REC1, and the field 'Swimability_band' defines the modelled E. coli attribute state NPS-FM human health for recreation value. The rest of the fields come from the River Environment Classification.

This dataset includes three “packages” of information, each with multiple variables. The packages include:

1. Load – results on mean annual suspended sediment load reported by REC 2 river reach scale for various model scenario variations.
2. Lakes – results on sediment inflow, outflow, and entrapment in lakes and reservoirs
3. Coastal – results on sediment inflows, trap efficiency, and sedimentation rates in coastal hydrosystems (estuaries)

For further detail on the modelling methods and discussing results, see Hicks, M., Semademi-Davies, A., Haddadchi, A., Shankar, U., Plew, D. (2019) Updated sediment load estimator for New Zealand. NIWA Client Report No. 2018341CH, prepared for Ministry for the Environment. January 2019. Available online: www.mfe.govt.nz/publications/fresh-water/updated-s...

Note that some portions of this dataset refine and update 2011 modelling on suspended sediment loads across New Zealand, whereas other components, especially the coastal package, report new modelling results.

State of the Environment (SOE) swimming water quality monitoring point data.

This data is a component of the Water Quality for swimming maps: www.mfe.govt.nz/fresh-water/state-of-our-fresh-wat...

Versions

This version has now been replaced with a later edition: data.mfe.govt.nz/layer/95566-swimming-water-qualit...

Column headings

WKT: Point geometry

sitename: Name of site

NZReach: ID of nearest River Environment Classification reach

category: Water quality for swimming category see www.mfe.govt.nz/fresh-water/national-targets-swimm...

Region: Region

name: Name of water body (if available)

catchment: Name of catchment (if available)

Dualcatch: Is catchment a two-part catchment

algae: Algae status

clarity: Clarity status

State of the Environment (SOE) swimming water quality monitoring point data.

This data is a component of the Water Quality for swimming maps: www.mfe.govt.nz/fresh-water/state-of-our-fresh-wat...

Versions

This version is the latest edition in the set.

Column headings

WKT: Point geometry

sitename: Name of site

NZReach: ID of nearest River Environment Classification reach

category: Water quality for swimming category see www.mfe.govt.nz/fresh-water/national-targets-swimm...

Region: Region

name: Name of water body (if available)

catchment: Name of catchment (if available)

Dualcatch: Is catchment a two-part catchment

algae: Algae status

clarity: Clarity status

Suitability for Recreation Grade (SFRG) swimming water quality monitoring point data.

This data is a component of the Water Quality for swimming maps: www.mfe.govt.nz/fresh-water/state-of-our-fresh-wat...

Versions

This version has now been replaced with a later edition: data.mfe.govt.nz/layer/95564-swimming-water-qualit...

Column headings

WKT: Point geometry

NZReach: ID of nearest River Environment Classification reach

category: Water quality for swimming category see www.mfe.govt.nz/fresh-water/national-targets-swimm...

Council_na: Regional council name

Region: Region

sitename: Name of site

LAWA_siten: Land, Air, Water, Aotearoa's name of site

Program_ty: Type of waterbody

catchment: Name of catchment (if available)

algae: Algae status

clarity: Clarity status

Suitability for Recreation Grade (SFRG) swimming water quality monitoring point data.

This data is a component of the Water Quality for swimming maps: www.mfe.govt.nz/fresh-water/state-of-our-fresh-wat...

Versions

This version is the latest edition in this set.

Column headings

WKT: Point geometry

NZReach: ID of nearest River Environment Classification reach

category: Water quality for swimming category see www.mfe.govt.nz/fresh-water/national-targets-swimm...

Council_na: Regional council name

Region: Region

sitename: Name of site

LAWA_siten: Land, Air, Water, Aotearoa's name of site

Program_ty: Type of waterbody

catchment: Name of catchment (if available)

algae: Algae status

clarity: Clarity status

The Stock Exclusion Low Slope Land 2020 layer identifies areas of "low slope land" as defined in the Resource Management (Stock Exclusion) Regulations 2020. The layer shows the land parcels, or part parcels, defined as low slope land. These areas have a mean slope is less than or equal to 10 degrees. Parcels with a parcel intent of "ROAD" are excluded. Areas of lakes, ponds, settlements and urban parkland, as defined in Land Cover Database 5, are also excluded. Areas of low-slope grassland and annual cropland within high-slope parcels are also included in the Stock Exclusion Low Slope Land extent.

This dataset provides boundaries for catchments that drain to the sea (i.e. sea draining catchments).

It is extracted from the Freshwater Ecosystems of New Zealand (FENZ) v1.0 geodatabase. Ministry for the Environment hosts this copy of this layer for convenience and visibility. For all inquiries please contact Department of Conservation directly.

FENZ requires specialist GIS knowledge for its technical operation and biodiversity knowledge for understanding the content. Because of FENZ’s complexity, DOC is providing advice, briefings and training (where possible) to ensure users understand its strengths, limitations and appropriate applications.

If you would like more information about FENZ or access to any FENZ data sets, email fenz@doc.govt.nz.

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www.doc.govt.nz/our-work/freshwater-ecosystems-of-...

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Variables:

Catch_id - This is a unique identifier that can be used to link to other datasets in the FENZ database, or datasets from other sources that also use a FENZ id.

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Catchment names:

Currently a definitive catchment names dataset does not exist. However for your convenience, an unofficial list has been provided in the attachments ("fenz_catnames.csv") which can be joined to the catchment boundaries to provide names. Feedback on the accuracy or completeness of these names is welcomed.

Summary

Water quality for swimming categories for rivers 4th order and above. This dataset was used to compose the current state for water quality for swimming.

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 is the latest version of the Water Quality for Swimming Categories set.

Column headings:

NZREACH: NZREACH from the River Environment Classification Version 1

ORDER: Strahler stream order

Category: Water quality for swimming category see www.mfe.govt.nz/fresh-water/national-targets-swimm...

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