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
Dobson River (New Zealand) New Zealand Department of Conservation maintains a tramping track and several backcountry huts in the river valley. Two of the huts are accessible by 4WD vehicle. There is no direct geographical link with the West Coast town of Dobson. Dobson River (New Zealand) The Dobson River is a river in the South Island of New Zealand. It flows south between the Neumann and Ohau ranges for from its source to the east of Mount Hopkins, in the Southern Alps, before joining with the Hopkins River, close to the latter's entry into the northern end of Lake Ohau in the Mackenzie