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There are 3,820 lakes in New Zealand that have a
surface area The surface area of a solid object is a measure of the total area that the surface of the object occupies. The mathematical definition of surface area in the presence of curved surfaces is considerably more involved than the definition of arc ...
larger than one hectare. Many of the lakes in the central
North Island The North Island, also officially named Te Ika-a-Māui, is one of the two main islands of New Zealand, separated from the larger but much less populous South Island by the Cook Strait. The island's area is , making it the world's 14th-largest ...
are
volcanic A volcano is a rupture in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface. On Earth, volcanoes are most often found where tectonic plates a ...
crater lake Crater Lake (Klamath language, Klamath: ''Giiwas'') is a volcanic crater lake in south-central Oregon in the western United States. It is the main feature of Crater Lake National Park and is famous for its deep blue color and water clarity. The ...
s. The majority of the lakes near the
Southern Alps / Kā Tiritiri o te Moana The Southern Alps (; officially Southern Alps / Kā Tiritiri o te Moana) is a mountain range extending along much of the length of New Zealand's South Island, reaching its greatest elevations near the range's western side. The name "Southern ...
were carved by glaciers. Artificial lakes created as hydroelectric reservoirs are common in
South Canterbury South Canterbury is the area of the Canterbury Region of the South Island of New Zealand bounded by the Rangitata River in the north and the Waitaki River (the border with the Otago Region) to the south. The Pacific Ocean and ridge of the Southe ...
,
Central Otago Central Otago is located in the inland part of the Otago region in the South Island of New Zealand. The motto for the area is "A World of Difference". The area is dominated by mountain ranges and the upper reaches of the Clutha River and tributa ...
and along the
Waikato River The Waikato River is the longest river in New Zealand, running for through the North Island. It rises on the eastern slopes of Mount Ruapehu, joining the Tongariro River system and flowing through Lake Taupō, New Zealand's largest lake. It th ...
.


Statistics

*Largest lake:
Lake Taupō Lake Taupō (also spelled Taupo; mi, Taupō-nui-a-Tia or ) is a large crater lake in New Zealand's North Island, located in the caldera of the Taupō Volcano. The lake is the namesake of the town of Taupō, which sits on a bay in the lake's nor ...
– *Deepest lake: Lake Hauroko – 462 m There are: *41 lakes with a surface area larger than 10 km2 (1000 ha) *229 lakes greater than 0.5 km2 (50 ha) *3820 lakes greater than 0.01 km2 (1 ha)


Pollution

A
trophic level index The trophic level index (TLI) is used in New Zealand as a measure of nutrient status of lakes. It is similar to the trophic state index but was proposed as alternative that suited New Zealand. The system uses four criteria, phosphorus and nitrog ...
is used as a measure of the pollution levels of lakes in New Zealand. Based on the monitoring of 134 lakes it is estimated that one third of New Zealand lakes have high nutrient levels or have poor water quality.New Zealand Ministry for the Environment
– Trophic Level Index for lakes


See also

*
Rivers of New Zealand The rivers of New Zealand are used for a variety of purposes and face a number of environmental issues. In the North Island's hill country the rivers are deep, fast flowing and most are unnavigable. Many of the rivers in the South Island are b ...
*
Water in New Zealand Water is relatively abundant in New Zealand due to the temperate climate and maritime weather patterns. In recent years, water pollution and draw-down of aquifers have become important environmental issues in New Zealand. Waters in New Zealand ...
* List of dams and reservoirs in New Zealand *
Environment of New Zealand The environment of New Zealand is characterised by an endemic flora and fauna which has evolved in near isolation from the rest of the world. The main islands of New Zealand span two biomes, temperate and subtropical, complicated by large mount ...


References


Further reading

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External links


Lake Ecosystem Restoration New Zealand

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