Trends in groundwater quality, 2005–2014

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Creative Commons Attribution 3.0 New Zealand

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6753
26
Added
25 Apr 2017

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

Groundwater quality indicators include E.coli, nitrate-nitrogen, ammoniacal nitrogen, and dissolved reactive phosphorus. Also included is data on pesticides, iron, manganese, electrical conductivity, and total dissolved solids. Information on sampling protocol, equipment, and method is provided.

Nitrogen occurs naturally in groundwater, but usually at very low concentrations. Agricultural and urban land use can add more nitrate-nitrogen to groundwater. If used for drinking water, high levels of nitrogen in groundwater can affect human health and the quality of surrounding rivers and lakes. Ammoniacal nitrogen is undesirable if groundwater is used for drinking, and elevated levels of nitrate and ammoniacal nitrogen can be toxic to fish and other animals. Surplus phosphorus drains (leaches) into groundwater as dissolved reactive phosphorus. It can also be present naturally from interactions between groundwater and rocks. Too much phosphorus can lead to excessive plant and algae growth where groundwater flows into surface water. E.coli in fresh water can indicate the presence of pathogens (disease-causing organisms) from animal or human faeces. The pathogens can cause illness for anyone who ingests them.

This dataset relates to trends in four groundwater quality indicators: nitrate nitrogen, ammoniacal nitrogen, dissolved reactive phosphorus, and E.coli. throughout New Zealand over the 10-year period 2005–2014.

Table ID 53604
Data type Table
Row count 1683
Services Web Feature Service (WFS), Catalog Service (CS-W), data.govt.nz Atom Feed

Total phosphorus, 2009–2013

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Creative Commons Attribution 3.0 New Zealand

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7802
56
Added
11 Jan 2016

This dataset was first added to MfE Data Service on 11 Jan 2016.

"Phosphorus is an essential nutrient for plant and animal life. Phosphorus can vary due to differences in land use, climate, elevation, and geology. Total phosphorus (TP) includes all concentrations in a sample, whether dissolved, in solid form or bound to sediment in the river. Dissolved reactive phosphorus (DRP) is the portion which is dissolved and can immediately support plant and algae growth. Excess phosphorus in our rivers can cause large amounts of (sometimes toxic) algae to grow, which can harm river health and reduce the recreational and aesthetic value of rivers.
This dataset relates to the "Geographic pattern of phosphorus in river water" measure on the Environmental Indicators, Te taiao "

Layer ID 52737
Data type Vector point
Feature count 716
Services Vector Query API, Web Feature Service (WFS), Catalog Service (CS-W), data.govt.nz Atom Feed

Total phosphorus trend, 1989–2013

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Creative Commons Attribution 3.0 New Zealand

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7548
32
Added
11 Jan 2016

This dataset was first added to MfE Data Service on 11 Jan 2016.

"Phosphorus is an essential nutrient for plant and animal life. Total phosphorus (TP) includes all concentrations in a sample, whether dissolved, in solid form or bound to sediment in the river. Dissolved reactive phosphorus (DRP) is the portion which is dissolved and can immediately support plant and algae growth. Excess phosphorus in our rivers can cause large amounts of (sometimes toxic) algae to grow, which can harm river health and reduce the recreational and aesthetic value of rivers.
This dataset relates to the "River water quality trends: phosphorus" measure on the Environmental Indicators, Te taiao "

Layer ID 52738
Data type Vector point
Feature count 77
Services Vector Query API, Web Feature Service (WFS), Catalog Service (CS-W), data.govt.nz Atom Feed

Total Nitrogen, 2009–2013

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Creative Commons Attribution 3.0 New Zealand

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8170
52
Added
11 Jan 2016

This dataset was first added to MfE Data Service on 11 Jan 2016.

"Small amounts of nitrogen are a natural component of healthy rivers. Nitrogen in rivers can vary due to differences in land use, climate, elevation, and geology. Nitrogen is transferred from land to water and is cycled through different forms, which can have different effects. Moderate concentrations of nitrate can cause weeds and algae to grow too fast. High concentrations of ammoniacal and nitrate nitrogen can be toxic to fish and other aquatic animals.
This dataset relates to the "Geographic pattern of nitrogen in river water" measure on the Environmental Indicators, Te taiao Aotearoa website. "

Layer ID 52736
Data type Vector point
Feature count 493
Services Vector Query API, Web Feature Service (WFS), Catalog Service (CS-W), data.govt.nz Atom Feed

Total Nitrogen trends, 1989–2013

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Creative Commons Attribution 3.0 New Zealand

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9555
32
Added
11 Jan 2016

This dataset was first added to MfE Data Service on 11 Jan 2016.

"Small amounts of nitrogen are a natural component of healthy rivers. Nitrogen is transferred from land to water and is cycled through different forms, which can have different effects. Moderate concentrations of nitrate can cause weeds and algae to grow too fast. High concentrations of ammoniacal and nitrate nitrogen can be toxic to fish and other aquatic animals.
This dataset relates to the "River water quality trends: nitrogen" measure on the Environmental Indicators, Te taiao Aotearoa website. "

Layer ID 52735
Data type Vector point
Feature count 77
Services Vector Query API, Web Feature Service (WFS), Catalog Service (CS-W), data.govt.nz Atom Feed

Te Arawa Lakes Trust Cultural Monitoring Datasheet 2016

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Creative Commons Attribution 3.0

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843
20
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

Stream bed sedimentation - predicted cover in all river reaches nationwide

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Creative Commons Attribution 3.0 New Zealand

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5511
50
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.

Predictions of the proportion of deposited fine sediment cover are provided for every river reach in the River Environment Classification. These were calculated via a regression model using the measured proportion of fine sediment cover, slope of the river, climate and catchment land cover.

NZREACH = River location ID from the River Environment Classification
pred_obs = predicted contemporary percent fine sediment cover
pred_expec = predicted pre-human percent fine sediment cover

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

Table ID 52540
Data type Table
Row count 576276
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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5732
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

Stats NZ (2017) Technical note on initial assessment of modelled e coli data

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Creative Commons Attribution 3.0

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3451
98
Added
24 Apr 2017

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

15
Document ID12871
File namestats-nz-2017-technical-note-on-initial-assessment-of-modelled-e-coli-data.pdf
TypePDF
Size650 KB

Selected barriers to freshwater fish in Hawke’s Bay, 2002–10

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Creative Commons Attribution 3.0 New Zealand

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6803
11
Added
25 Apr 2017

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

Many of New Zealand’s iconic freshwater fish species are diadromous, which means they need to migrate between fresh water and the ocean to complete their life cycles. Some man-made structures such as culverts, weirs, stormwater pump stations, tide gates, and dams can obstruct diadromous fish migrations and prevent fish from reaching critical habitats.

This can result in the gradual decline and loss of fish species from some rivers, and streams and lakes. Protecting the connection between upstream and downstream habitats of our indigenous fish is as important as protecting their habitats themselves.

We do not yet have enough data to provide a national picture on fish barriers, so we report on known barriers to freshwater fish passage in the Hawke’s Bay region from culverts, weirs, and stormwater pump stations.

Table ID 53607
Data type Table
Row count 80
Services Web Feature Service (WFS), Catalog Service (CS-W), data.govt.nz Atom Feed
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