Rivers of New Zealand Rivers of New Zealand The rivers of New Zealand are used for a variety of purposes and face a number of environmental issues. Many of the rivers in the South Island are braided rivers. The longest river in New Zealand is the Waikato River with a length of . The largest river by volume is the Clutha River with a mean discharge of . Some of the rivers, especially those with wide flood plains and stop banks, have long road bridges spanning them. The Rakaia River is crossed by the longest bridge in New Zealand at . The third longest
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