"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.
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|1.||Lake water quality, 2009 13||188 KB||
|Category||Environmental Reporting > Freshwater > Lakes|
|Tags||water, New Zealand, WATER-Quality|
|Regions||Arnold Valley, Christchurch City, Far North District, Grey District, Greymouth Rural, Hastings District, Horowhenua District, Inland Water-Lake Ellesmere So, Kaikoura District, Kaipara District, Kapiti Coast District, Kawerau, Kawerau District, Little River, Mackenzie District, Marsden-Hohonu, Napier City, Rotorua District, Selwyn District, Taramakau, Timaru District, Western Bay of Plenty District, Westland District|
|Metadata||ISO 19115/19139, Dublin Core|
|Data type||Vector point||Feature count||86|
|Attributes||sID, npID, Nsamples, Censored, Nyears, Q0_05, Q0_2, Q0_5, Q0_8, Q0_95, lakename, rcid, nzreach, nzmge, nzmgn, alt_bin, maxdepth, depth_bin, laketype, LakeCat, Trophic_state|
|Services||Vector Query API, Web Feature Service (WFS), Catalog Service (CS-W), data.govt.nz Atom Feed|
|Added||18 Feb 2016|
|Last updated||18 Feb 2016|
|Revisions||2 - Browse all revisions|
|Current revision||Imported on Feb. 19, 2016 from File Geodatabase in NZGD2000 / New Zealand Transverse Mercator 2000.|
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