Creative Commons Attribution 3.0 New Zealand
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This dataset was first added to MfE Data Service on 29 Sep 2015.
When nutrients accumulate in lakes (referred to as ‘nutrient enrichment’) above certain levels, they can make the lakes murky and green with algae, and lower oxygen levels. Lakes with extremely poor water quality are rarely suitable for recreation and provide poor habitats for aquatic species.
Percentile calculations for the following parameters are provided:
Trophic Level Index 3 (TLI)
Chlorophyll-a (CHLA)
Bottom-water dissolved oxygen (DObottom)
Ammoniacal nitrogen (NH4N)
Oxidised nitrogen (NO3N)
Total nitrogen (unfiltered) (TN)
Dissolved reactive phosphorus (DRP)
Total phosphorus (unfiltered) (TP)
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 "Lake water quality: Trophic Level Index" measure on the Environmental Indicators, Te taiao Aotearoa website.
Table ID | 52537 |
---|---|
Data type | Table |
Row count | 5632 |
Services | Web Feature Service (WFS), Catalog Service (CS-W), data.govt.nz Atom Feed |
Creative Commons Attribution 3.0 New Zealand
You may use this work for commercial purposes.
You must attribute the creator in your own works.
This dataset was first added to MfE Data Service on 29 Sep 2015.
When nutrients accumulate in lakes (referred to as ‘nutrient enrichment’) above certain levels, they can make the lakes murky and green with algae, and lower oxygen levels. Lakes with extremely poor water quality are rarely suitable for recreation and provide poor habitats for aquatic species.
Trends in the following parameters are provided:
Trophic Level Index 3 (TLI)
Chlorophyll-a (CHLA)
Bottom-water dissolved oxygen (DObottom)
Ammoniacal nitrogen (NH4N)
Oxidised nitrogen (NO3N)
Total nitrogen (unfiltered) (TN)
Dissolved reactive phosphorus (DRP)
Total phosphorus (unfiltered) (TP)
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 "Lake water quality: Trophic Level Index" measure on the Environmental Indicators, Te taiao Aotearoa website.
Table ID | 52538 |
---|---|
Data type | Table |
Row count | 3724 |
Services | Web Feature Service (WFS), Catalog Service (CS-W), data.govt.nz Atom Feed |
Creative Commons Attribution 3.0 New Zealand
You may use this work for commercial purposes.
You must attribute the creator in your own works.
This dataset was first added to MfE Data Service on 17 Feb 2016.
"The Lake Trophic Level Index (TLI) characterises the life supporting capacity of a lake based on nutrient enrichment. In general, the higher the TLI score, the poorer the water quality in the lake. Lakes with extremely poor quality are rarely suitable for recreation and provide poor quality habitat for aquatic species.
Care should be taken when interpreting these results. Monitored lakes consist of about 4 percent of all New Zealand lakes, and programmes may focus on those that have poor water quality or are at risk due to the type of land use in their catchment.
After checking for data consistency, the lakes considered suitable for national comparison are sparsely and unevenly distributed, with gaps in the Manawatu, Taranaki, Tasman, Marlborough, Otago, and West Coast regions. The lakes considered in the analysis are located mainly in Northland, Bay of Plenty, Hawke’s Bay, and Canterbury.
This dataset relates to the ""Lake water quality: trophic level index"" measure on the Environmental Indicators, Te taiao Aotearoa website.
"
Layer ID | 53310 |
---|---|
Data type | Vector point | Feature count | 86 |
Services | Vector Query API, Web Feature Service (WFS), Catalog Service (CS-W), data.govt.nz Atom Feed |
Creative Commons Attribution 4.0 International
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This item was first added to MfE Data Service on 16 Apr 2019
Document ID | 21925 |
---|---|
File name | lake-water-quality-state-20132017-data-quality.pdf |
Type | |
Size | 504 KB |
Creative Commons Attribution 4.0 International
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This item was first added to MfE Data Service on 16 Apr 2019
Document ID | 21926 |
---|---|
File name | lake-water-quality-state-20132017-raw-data.csv |
Type | CSV |
Size | 174 KB |
Creative Commons Attribution 4.0 International
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This item was first added to MfE Data Service on 16 Apr 2019
Document ID | 21927 |
---|---|
File name | lake-water-quality-trends-data-quality.pdf |
Type | |
Size | 517 KB |
Creative Commons Attribution 4.0 International
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This item was first added to MfE Data Service on 16 Apr 2019
Document ID | 21928 |
---|---|
File name | lake-water-quality-10-year-trends-raw-data.csv |
Type | CSV |
Size | 167 KB |
Creative Commons Attribution 4.0 International
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This item was first added to MfE Data Service on 16 Apr 2019
Document ID | 21929 |
---|---|
File name | lake-water-quality-20-year-trends-raw-data.csv |
Type | CSV |
Size | 47.4 KB |
Creative Commons Attribution 4.0 International
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This item was first added to MfE Data Service on 16 Apr 2019
Document ID | 21930 |
---|---|
File name | lake-water-quality-28-year-trends-raw-data.csv |
Type | CSV |
Size | 23.8 KB |
Creative Commons Attribution 4.0 International
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This item was first added to MfE Data Service on 16 Apr 2019
Document ID | 21931 |
---|---|
File name | lake-water-quality-10-year-trends-raw-data.csv |
Type | CSV |
Size | 167 KB |