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
Robinson River (New Zealand) Robinson River (New Zealand) The Robinson River is a river in the West Coast Region of the South Island of New Zealand. It is a tributary of the Upper Grey River and much of the river lies within the Lake Sumner Conservation Park. Rising on the slopes of Mount Boscawen () on the main divide about south of the Lewis Pass, the river runs west-southwest along a straight, narrow valley before turning northwest to reach the Upper Grey. Some older maps show the river as the Marchant River or the Marchant Robinson River. A two-day tramping track known as the