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
Diahot River and Centennial dry "low water characteristic discharge" 0.2 m³.s. Diahot River Diahot is the longest river of New Caledonia, flowing for some 60 miles (100 kilometres). It has a catchment area of 620 square kilometres and opens north-westward into the Baie d'Harcourt, flowing towards the northern point of the island along the western escarpment of the Mont Panié. The village of Ouégoa lies on the river, not far from the mouth. The Diahot flows into the sea between the villages of Bwalayet and Pam, just south of Ile de Pam. It carries a substantial load of fine-grained sediment, which has