Stream bed sedimentation - observed cover at fish monitoring sites

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Creative Commons Attribution 3.0 New Zealand

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1276
18
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

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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1277
4
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

Freshwater pests: Tench

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Creative Commons Attribution 3.0 New Zealand

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1263
5
Added
11 Jan 2016

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

"Freshwater plant and animal pests can have significant negative impacts on ecosystem health by reducing indigenous biodiversity through predation and competition, and destabilising aquatic habitats. Freshwater plant pests can cause economic losses through blocking water intakes for hydroelectricity generation, impeded drainage or irrigation. In addition, pests can affect the suitability for recreational activities.
This dataset relates to the "Freshwater pests" measure on the Environmental Indicators, Te taiao Aotearoa website. "

Layer ID 52740
Data type Vector point
Feature count 128
Services Vector Query API, 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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1262
5
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

Trends in groundwater quality, 2005–2014

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Creative Commons Attribution 3.0 New Zealand

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1231
14
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

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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1196
36
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

Urban stream water quality - trends - 2008–15

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Creative Commons Attribution 3.0 New Zealand

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1213
19
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

Urban water quality - all data - 1985–2015

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Creative Commons Attribution 3.0 New Zealand

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1203
29
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.

Heavy metals have the ability to accumulate in sediments, shellfish, and other aquatic organisms. Metals can reach toxic levels in organisms making them unsafe to consume and can be toxic to aquatic life. Nutrients can cause excessive algal growth and E.coli has the ability to make people sick while they are swimming if concentrations are high enough. Rivers with poor water quality are rarely suitable for recreation and provide poor habitats for aquatic species.

File contains data related to each sampling occasion by site for each water quality indicator in Auckland, Wellington, and Christchurch over the period 1985–15.

Table ID 53600
Data type Table
Row count 58661
Services Web Feature Service (WFS), Catalog Service (CS-W), data.govt.nz Atom Feed

Macroinvertebrate Community Index percentiles, by monitoring site, 2009-13

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Creative Commons Attribution 3.0 New Zealand

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1164
35
Added
29 Sep 2015

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

Benthic macroinvertebrates are small animals without backbones (eg insects and worms). They live on and under submerged logs, rocks, and aquatic plants on the beds of rivers and streams during some part of their life cycle. Macroinvertebrates play a central role in stream ecosystems by feeding on periphyton (algae), macrophytes (aquatic plants), dead leaves and wood, or on each other. A high macroinvertebrate community index (MCI) indicates a high level of river health.

File contains state results for each monitored site, expressed as percentile calculations for the period 2009-2013. See Larned et al. 2015 for further details.

For more information please see:
Larned, S, Snelder, T, Unwin, M, McBride, G, Verburg, P, McMillan, H (2015).Analysis of Water Quality in New Zealand lakes and Rivers: data sources, data sets, assumptions, limitations, methods and results. NIWA Client Report no. CHC2015-033. Available at data.mfe.govt.nz/x/DDui3u from the Ministry for the Environment dataservice.

This dataset relates to the "River water quality: Benthic macroinvertebrates" measure on the Environmental Indicators, Te taiao Aotearoa website.

Table ID 52534
Data type Table
Row count 512
Services Web Feature Service (WFS), Catalog Service (CS-W), data.govt.nz Atom Feed

Fish licences issued by Fish and Game, 1980/81 to 2013/14 seasons

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Creative Commons Attribution 3.0 New Zealand

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1182
13
Added
29 Sep 2015

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

Fresh water in New Zealand is highly valued for recreational activities, including fishing. Freshwater angling (primarily for introduced ‘sports fish’ such as brown trout, rainbow trout, and chinook salmon) is a popular leisure activity. Fish licences issued by Fish & Game New Zealand provide an indication of recreational fishing activity at freshwater locations around the country.

This dataset relates to the "Participation in recreational fishing" measure on the Environmental Indicators, Te taiao Aotearoa website.

Table ID 52543
Data type Table
Row count 238
Services Web Feature Service (WFS), Catalog Service (CS-W), data.govt.nz Atom Feed
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