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
Bowen River (New Zealand) Bowen River (New Zealand) The Bowen River is a river in northern Fiordland, New Zealand. The river originates near Mount Grave and is joined by many small streams on its way south through the valley. After close to , the river plunges from the hanging valley over the Lady Bowen Falls and drains into the head of Milford Sound. The falls are named for Diamantina Bowen, wife of George Bowen, the fifth Governor of New Zealand. The falls provide electricity for the Milford Sound settlement by feeding a small hydroelectric scheme, and are also the water source for the settlement.