"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||Kawerau, Taramakau, Arnold Valley, Marsden-Hohonu, Greymouth Rural, Inland Water-Lake Ellesmere So, Little River, Kapiti Coast District, Kaipara District, Far North District, Horowhenua District, Napier City, Hastings District, Timaru District, Selwyn District, Mackenzie District, Kaikoura District, Western Bay of Plenty District, Rotorua District|
|Metadata||Dublin Core, ISO 19115/19139|
|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|