It flows north - west from its sources in the Southern Alps to meet the Okuru River 20 kilometres ( 12 mi ) south - east of Haast .
The Ngatau River is a river of the West Coast and Otago regions of New Zealand 's South Island .
Ngatau River flows north - west from Ngatau River 's sources in the Southern Alps to meet the Okuru River 20 kilometres ( 12 mi ) south - east of Haast .
The Ngatau River is a river of the West Coast and Otago regions of New Zealand 's South Island .