Lake Wanaka
Encyclopedia
Lake Wanaka is located in the Otago
Otago
Otago is a region of New Zealand in the south of the South Island. The region covers an area of approximately making it the country's second largest region. The population of Otago is...

 region of New Zealand
New Zealand
New Zealand is an island country in the south-western Pacific Ocean comprising two main landmasses and numerous smaller islands. The country is situated some east of Australia across the Tasman Sea, and roughly south of the Pacific island nations of New Caledonia, Fiji, and Tonga...

, at an altitude of 300 metres. Covering an area of 192 km² (74.1 sq mi), it is New Zealand
New Zealand
New Zealand is an island country in the south-western Pacific Ocean comprising two main landmasses and numerous smaller islands. The country is situated some east of Australia across the Tasman Sea, and roughly south of the Pacific island nations of New Caledonia, Fiji, and Tonga...

's fourth largest lake, and estimated to be more than 300 m (984.3 ft) deep. Its name is Māori
Maori language
Māori or te reo Māori , commonly te reo , is the language of the indigenous population of New Zealand, the Māori. It has the status of an official language in New Zealand...

, a corruption of Oanaka ('The place of Anaka', a local tribal chief).

Wanaka
Wanaka
Wanaka is a town in the Otago region of the South Island of New Zealand. It is situated at the southern end of Lake Wanaka, adjacent to the outflow of the lake to the Clutha River. It is the gateway to Mount Aspiring National Park. Wanaka is primarily a resort town but has both summer and winter...

 is a town on the lake with which it shares its name.

Geography

Lake Wanaka lies at the heart of the Otago Lakes in the lower South Island of New Zealand. The township is situated in a dramatic glacier carved basin on the shores of the lake and is the gateway to Mt Aspiring National Park. Wild and beautiful Lake Hawea is a 15 minute drive away, en-route to the frontier town of Makarora, the last stop before the West Coast Glacier region. To the south is the historic Cardrona Valley, offering a scenic alpine route to neighbouring Queenstown. Lake Wanaka Geography

Geology

At its greatest extent, which is roughly along a north-south axis, the lake is 42 kilometres long. Its widest point, at the southern end, is 10 kilometres. The lake's western shore is lined with high peaks rising to over 2000 metres above sea level. Along the eastern shore the land is also mountainous, but the peaks are somewhat lower.

Wanaka lies in a u-shaped valley
U-shaped valley
A U-shaped valley also known as a glacial trough is one formed by the process of glaciation. It has a characteristic U-shape, with steep, straight sides, and a flat bottom. Glaciated valleys are formed when a glacier travels across and down a slope, carving the valley by the action of scouring...

 formed by glacial
Glacier
A glacier is a large persistent body of ice that forms where the accumulation of snow exceeds its ablation over many years, often centuries. At least 0.1 km² in area and 50 m thick, but often much larger, a glacier slowly deforms and flows due to stresses induced by its weight...

 erosion during the last ice age
Ice age
An ice age or, more precisely, glacial age, is a generic geological period of long-term reduction in the temperature of the Earth's surface and atmosphere, resulting in the presence or expansion of continental ice sheets, polar ice sheets and alpine glaciers...

, more than 10,000 years ago. It is fed by the Matukituki-
Matukituki River
The Matukituki River is found in the Southern Alps of New Zealand's South Island. It flows for 30 kilometres from Mount Aspiring National Park into the southwestern edge of Lake Wanaka just after passing under the West Wanaka bridge....

 and Makarora River
Makarora River
-Geography:The headwaters are in Mount Aspiring National Park, on the eastern flanks of the Southern Alps near Haast Pass, which is the saddle between the Makarora and Haast River valleys. The Makarora flows south into the northern end of Lake Wanaka after passing the small community of Makarora...

s, and is the source of the Clutha River
Clutha River
The Clutha River / Mata-Au is the second longest river in New Zealand flowing south-southeast through Central and South Otago from Lake Wanaka in the Southern Alps to the Pacific Ocean, south west of Dunedin. It is the highest volume river in New Zealand, and the swiftest, with a catchment of ,...

. Nearby Lake Hawea
Lake Hawea
Lake Hawea is located in the Otago Region of New Zealand, at an altitude of 348 metres. It covers an area of some 141 km² and is, at its deepest, 392 metres deep...

 lies in a parallel valley carved by a neighbouring glacier eight kilometres to the east. At their closest point (a rocky ridge called The Neck), the lakes are only 1,000 metres apart.

Numerous small islands (notably Ruby Island, Stevensons Island and Harwich Island) are to be found at the southern end of the lake, with some now serving as ecological sanctuaries, for example for buff weka
Weka
The Weka or woodhen is a flightless bird species of the rail family. It is endemic to New Zealand, where four subspecies are recognized. Weka are sturdy brown birds, about the size of a chicken. As omnivores, they feed mainly on invertebrates and fruit...

 in case of Stevensons Island. The only flat land around the lake is also to be found here, surrounding the outflow into the Clutha River. The towns of Wanaka
Wanaka
Wanaka is a town in the Otago region of the South Island of New Zealand. It is situated at the southern end of Lake Wanaka, adjacent to the outflow of the lake to the Clutha River. It is the gateway to Mount Aspiring National Park. Wanaka is primarily a resort town but has both summer and winter...

 and Albert Town
Albert Town, New Zealand
Albert Town is located to the east of Wanaka in Otago, New Zealand. Until recently only a farming settlement, the population boom in this area has led to much new development. The confluence of the Clutha and Cardrona Rivers is located here. The town was named after Prince Albert of Saxe-Coburg and...

 are situated here.

Exploration and settlement

While Māori had long known of its existence, the first European to reach the lake is thought to have been Nathaniel Chalmers in 1853. Accompanied by Māoris, he walked from Tuturau (Southland
Southland Region
Southland is New Zealand's southernmost region and is also a district within that region. It consists mainly of the southwestern portion of the South Island and Stewart Island / Rakiura...

) to the lake via the Kawarau River
Kawarau River
Kawarau River drains Lake Wakatipu, in northwestern Otago, New Zealand. The river flows generally eastwards for about 60 km and passes through the steep Kawarau Gorge until it joins Lake Dunstan near Cromwell. The Shotover River enters it from the north; the Nevis River enters it from the south...

, later returning by a raft floating down the Clutha. Around 1859, other explorers who were now mapping the area also found a ruined Māori village (destroyed in a tribal raid in 1836) in the Makarora Valley. Around 1861, several new sheep stations had been established in around the south end of the lake, and in 1862, the lake itself was surveyed in a whaleboat. The early European name was Lake Pembroke.

Current use and tourism

In addition to ongoing sheep farming, the lake is now a popular resort, and is much used in the summer for fishing
Fishing
Fishing is the activity of trying to catch wild fish. Fish are normally caught in the wild. Techniques for catching fish include hand gathering, spearing, netting, angling and trapping....

, boating and swimming. The nearby mountains and fast-flowing rivers allow for adventure tourism year-round, with jetboat
Jetboat
A jetboat is a boat propelled by a jet of water ejected from the back of the craft. Unlike a powerboat or motorboat that uses a propeller in the water below or behind the boat, a jetboat draws the water from under the boat into a pump inside the boat, then expels it through a nozzle at the...

ing and skiing
Skiing
Skiing is a recreational activity using skis as equipment for traveling over snow. Skis are used in conjunction with boots that connect to the ski with use of a binding....

 facilities located nearby.

Lake Wanaka was repeatedly mentioned in the movie Mission Impossible III as a location the lead couple visited. It was the answer to Tom Cruise's question on the phone to verify the identity of his wife.

The cook and author Annabel Langbein
Annabel Langbein
Annabel Langbein is a New Zealand celebrity cook, food writer and publisher. She is also a regular radio guest and TV presenter, and has fronted her own TV series, Annabel Langbein The Free Range Cook, on the TV One network in New Zealand...

 owns a small estate at the side of the lake and filmed her latest series 'The Real Cook' here.

Conservation

As one of the few lakes in the South Island with an unmodified shoreline, the lake is protected by special legislation, namely the Lake Wanaka Preservation Act of 1973. This established a 'Guardians of Lake Wanaka' group, whose members are appointed by the Minister of Conservation, and advise on measures to protect the lake.

Oxygen weed (Lagarosiphon major
Lagarosiphon major
Lagarosiphon major is a monocotic aquatic plant native to Southern Africa. Common names include African elodea, curly waterweed, oxygen weed and South African oxygen weed. It is used as freshwater aquarium plant....

), an aquarium plant and invasive species
Invasive species
"Invasive species", or invasive exotics, is a nomenclature term and categorization phrase used for flora and fauna, and for specific restoration-preservation processes in native habitats, with several definitions....

 native to Southern Africa, has been a problem in the lake's ecosystem for some time. Attempts to eradicate the weed have not been successful yet. Substantial suction dredging operations have shown promise, but tend to miss isolated spots which then regrow into larger weed beds.
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