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
Clarence River (New Zealand) earthquake blocked the Waiau Toa / Clarence River 10 to 12 km from its mouth, with water building up behind the slip. Residents near the river downstream from the slip were evacuated. The river broke through the debris 16 hours after it occurred. In 2018, the name of the river was officially gazetted as Waiau Toa / Clarence River, to reflect its original Māori name. Clarence River (New Zealand) The Waiau Toa / Clarence River is on northeast South Island of New Zealand. It is long, which makes it the eighth longest river in New Zealand. For its first ,