Rivers and Streams

In the Lower Wairarapa Valley the dominant river is the Ruamāhanga. It travels from the northern central Tararua Range through open country across the eastern…

Greater Wellington Regional Council carried out a flood and erosion hazard assessment for the Mangaroa River in 2007.

Carterton lies on the historical floodplain of the Mangatarere Stream and there is a recognised flood hazard to Carterton if the stream should break out…

The Ōtaki River catchment drains about 400 square kilometre of the steep western slopes of the Tararua Ranges

The Pinehaven Stream is jointly administered by Greater Wellington Regional Council and Upper Hutt City Council. Greater Wellington manages the reach from the Whitemans Road…

The Hutt River is a steep alluvial river that starts from the Tararua Ranges and enters Wellington Harbour at Petone.

The Ruamāhanga River system, from the Waiohine confluence upstream, has a total catchment area of 1560km².

The Waikanae River flows from the western foothills of the Tararua Ranges about 50 kilometres north of Wellington.

The Wainuiomata River catchment covers 133 square kilometres and a river length of about 22 kilometres. The location and shape of the Wainuiomata catchment make…

The Waiōhine River has a relatively long and narrow catchment area of 378 sq km on the eastern side of the Tararua Range.

A Floodplain Management Plan is currently being developed for the Waiwhetū Stream.