Accumulated freshwater takes, 2013–14

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Creative Commons Attribution 3.0 New Zealand

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7390
53
Added
25 Apr 2017

This dataset was first added to MfE Data Service on 25 Apr 2017.

Flow is the volume of water passing a point over a certain time, and provides information about the availability of water for people and the environment. Overall, this affects how much water is available for irrigation, drinking water, hydroelectricity generation, and recreational activities. River flows also influence a waterway’s physical form, habitat, and ecological processes like migration, spawning, and food supply for aquatic life.

The file provides the estimated impact of upstream consents on the modelled median flow of a particular reach in the digital river network. This is calculated by upstream total consented takes by median flow.

Table ID 53614
Data type Table
Row count 692989
Services Web Feature Service (WFS), Catalog Service (CS-W), data.govt.nz Atom Feed

Cultural Health Index scores for waterways, 2005–16

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Creative Commons Attribution 3.0 New Zealand

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7331
40
Added
25 Apr 2017

This dataset was first added to MfE Data Service on 25 Apr 2017.

Cultural Health Index scores for a waterway is a combination measure of historical cultural use and access, mahinga kai assessment, and water quality assessment from a cultural perspective of a site on a waterway.

The Cultural Health Index scores compile this information into a classification system to provide an overall grading of the state of a site and how the state of a site on a waterway affects the mauri, the ability for tangata whenua to feed the hapu and iwi and the overall water quality for the site. These are all important indicators of the cultural health of a waterway, and are also a consideration for other cultural and recreational activities like karakia, cleansing, swimming and wading.

Table ID 53617
Data type Table
Row count 42
Services Web Feature Service (WFS), Catalog Service (CS-W), data.govt.nz Atom Feed

Predicted capture of 11 fish species, 1977–2015

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Creative Commons Attribution 3.0 New Zealand

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7279
59
Added
25 Apr 2017

This dataset was first added to MfE Data Service on 25 Apr 2017.

Freshwater fish are an important component of freshwater ecosystems, have intrinsic biodiversity values and are a valued resource for Māori, recreational and commercial fishers. The presence of fish species can be affected by changes in catchment land cover and land use, in-stream habitat, fish passages (routes for moving up and down waterways), pests, and contaminants.

File contains predicted capture, including upper and lower confidence intervals for 11 fish species, including indices of native fish, exotic fish, and all fish, over the period 1977 ̶ 2015.

Table ID 53608
Data type Table
Row count 39
Services Web Feature Service (WFS), Catalog Service (CS-W), data.govt.nz Atom Feed

Estimated contemporary and pre-human wetland area, by type (2008 estimate)

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Creative Commons Attribution 3.0 New Zealand

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7232
50
Added
29 Sep 2015

This dataset was first added to MfE Data Service on 29 Sep 2015.

Wetlands support unique biodiversity and provide important services. They clean water of excess nutrients and sediment, help absorb floodwaters, and act as carbon sinks (remove carbon dioxide from the atmosphere). They also have cultural importance for Māori, and provide valuable food and materials (eg flax). Draining wetlands for agricultural and urban development over the past 150 years has significantly reduced their extent, leading to a loss of biodiversity and natural function. This dataset contains estimates of the national extent of the different types of wetlands in contempary and pre-human times.

This dataset relates to the "Wetland extent" measure on the Environmental Indicators, Te taiao Aotearoa website.

Table ID 52541
Data type Table
Row count 14
Services Web Feature Service (WFS), Catalog Service (CS-W), data.govt.nz Atom Feed

Groundwater pesticides survey, 2014

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Creative Commons Attribution 3.0 New Zealand

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7227
19
Added
25 Apr 2017

This dataset was first added to MfE Data Service on 25 Apr 2017.

Pesticides, which include insecticides, fungicides, herbicides and plant growth regulators, are commonly used in New Zealand to control insects, diseases and weeds in primary industries such as agricultural farming, forestry and horticulture. Once applied to land or crops, pesticides can make their way through soil and enter groundwater systems.

File contains whether a pesticide was detected at monitored wells, and if so, what the concentration is. File also includes surrounding land use, well use, well diameter, well depth, and screen depth, where available.

Table ID 53605
Data type Table
Row count 153
Services Web Feature Service (WFS), Catalog Service (CS-W), data.govt.nz Atom Feed

He Pātaka Wai Ora Report_datasheet raw water quality

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Creative Commons Attribution 3.0 New Zealand

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7196
8
Added
25 Apr 2017

This dataset was first added to MfE Data Service on 25 Apr 2017.

Table ID 53611
Data type Table
Row count 796
Services Web Feature Service (WFS), Catalog Service (CS-W), data.govt.nz Atom Feed

Stream bed sedimentation - observed cover at fish monitoring sites

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Creative Commons Attribution 3.0 New Zealand

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7171
30
Added
29 Sep 2015

This dataset was first added to MfE Data Service on 29 Sep 2015.

Fine sediment is the collective term for inorganic particles smaller than 2mm that are deposited on the beds of rivers and streams. Urban development, agriculture, and plantation forestry around waterways can increase the amount of sediment entering river systems. Sediment can clog the spaces between pebbles used by aquatic insects and fish, and degrade food sources and sites used for egg laying. Excessive sedimentation can also affect the suitability of rivers and streams for recreation.

Stream bed sediment observations are visual estimates of the proportion of the river bed covered by fine sediment. This information was collected during fish surveys, and stored in the Freshwater Fish database managed by NIWA. Observed in-stream sediment values for 10,025 sites are provided, dating from 1990 to 2011 in order to represent contemporary cover. The exception to this date range is the Fiordland area where all available information (1970 to 2011) was used to fill a representation gap.

This dataset relates to the "Stream bed sedimentation" measure on the Environmental Indicators, Te taiao Aotearoa website.

Table ID 52539
Data type Table
Row count 40928
Services Web Feature Service (WFS), Catalog Service (CS-W), data.govt.nz Atom Feed

Lake water quality state 2013–2017

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Creative Commons Attribution 4.0 International

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7166
32
Added
16 Apr 2019

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

This dataset contains ten lake water quality variables based on measurements made at monitored lake sites: chlorophyll-a, nitrate-nitrogen, total nitrogen, ammoniacal nitrogen, dissolved reactive phosphorus, total phosphorus, Escherichia coli, water clarity, and lake trophic level index (TLI3 and TLI4). 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 When nitrogen and phosphorus accumulate above certain concentrations in lakes (referred to as ‘nutrient enrichment’), they can stimulate excessive growth of algae and cyanobacteria. Chlorophyll-a is a measure of the phytoplankton (algae) biomass. The lake trophic level index (TLI) indicates the health of a lake based on concentrations of three variables:
· total nitrogen
· total phosphorus
· chlorophyll-a.
Water clarity is a measure of underwater visibility. Lakes with poor clarity and TLI are poor habitats for some species of animals and plants, and they may not be suitable for recreation. Ammoniacal nitrogen can be toxic to aquatic life if concentrations are high enough.

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 99872
Data type Table
Row count 454
Services Web Feature Service (WFS), Catalog Service (CS-W), data.govt.nz Atom Feed

Urban stream water quality - trends - 2008–15

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Creative Commons Attribution 3.0 New Zealand

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7124
30
Added
24 Apr 2017

This dataset was first added to MfE Data Service on 24 Apr 2017.

Urban water quality indicators include heavy metals, nutrients, and E.coli. The concentrations of these indicators are compared to the proportion of urban land cover in catchments.

Zinc and copper are heavy metals that can accumulate in sediments, shellfish, and other aquatic organisms. Metals can reach toxic levels in organisms making them unsafe to eat and can be toxic to aquatic life. Nitrogen and phosphorus are nutrients that can cause excessive algal growth. Ammonical nitrogen and nitrate-nitrogen can be toxic to aquatic life if concentrations in streams are high enough. E.coli is an indicator of disease-causing organisms, which may affect human health and recreational values in streams.

File contains trend analyses by site for water quality indicators in Auckland, Wellington, and Christchurch over the period 2008–15.

Table ID 53598
Data type Table
Row count 217
Services Web Feature Service (WFS), Catalog Service (CS-W), data.govt.nz Atom Feed

Predicted E.coli concentrations in rivers, 1990–2013

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Creative Commons Attribution 3.0 New Zealand

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7011
31
Added
24 Apr 2017

This dataset was first added to MfE Data Service on 24 Apr 2017.

River water quality is valued for many reasons including recreational value.
Escherichia coli (E.coli) can indicate the presence of pathogens (disease-causing organisms) from animal or human faeces, which can cause illness.

File contains the model outputs for E.coli concentrations as four different statistics for each river segment in New Zealand’s digital river network.

Table ID 53603
Data type Table
Row count 570577
Services Web Feature Service (WFS), Catalog Service (CS-W), data.govt.nz Atom Feed
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