Water in New Zealand and are of varying types and origins. Many of the lakes in the central North Island area are volcanic crater lakes, while the majority of the lakes near the Southern Alps were carved by glaciers. Hydroelectric reservoirs are common in South Canterbury, Central Otago and along the Waikato River. Over 180,000 kilometres of rivers has been mapped in New Zealand, the longest being the Waikato River with a length of 425 kilometres and the largest river by volume is the Clutha River with a mean discharge of 533 cubic metres per second. New Zealand has many notable waterfalls, some of
Hooker Glacier (New Zealand) Hooker Glacier (New Zealand) Hooker Glacier is one of several glaciers close to the slopes of Aoraki / Mount Cook in the Southern Alps of New Zealand. It is not as large as its neighbour, the Tasman Glacier, measuring 11 kilometres (roughly 6–7 miles) in length. The glacier starts on the south-western slopes of Aoraki/Mt Cook, with its tributaries Sheila Glacier, Empress Glacier, and Noeline Glacier. Hooker Glacier runs south from there until its terminus at Hooker Lake. The glacial water from the lake is the source of the Hooker River, a small tributary of the Tasman River, which flows