A Catchment or watershed is the area of land from which all rainfall and streams flows out into a river, a lake or the sea. The catchment of large rivers, such as the Wairau River, can be divided into smaller sub-catchments, which usually represent the tributaries.
State of the Environment monitoring is generally carried out at the bottom of catchments and sub-catchments. From a management point of view, a decline in water quality at the bottom of the catchment can be reflective of a degradation of water quality in the catchment as a whole.
Where State of the Environment monitoring has shown that water quality is degraded, catchment studies are carried out. These studies provide insight into the causes of poor water quality. Using the information from catchment studies council can work with land owners to address problems and improve water quality.
Are Are Creek 2015
SoE monitoring has shown that water quality in Are Are Creek is marginal.
Doctors Creek 2015
Doctors Creek is a tributary of the Taylor River, which flows through central Blenheim.
Linkwater Area 2019
Linkwater is an area located between the Pelorus Sound/Te Hoiere and Queen Charlotte Sound/Tōtaranui.
Mill Stream 2009
Mill Stream is a spring-fed tributary of the Wairau River.
Tuamarina River 2018
The Tuamarina River is a North Bank tributary of the lower Wairau River with a catchment area of 102 square kilometres.
Waitohi and Waikawa Streams 2018
The Waitohi and Waikawa Streams have a special place in the Rohe of Te Ātiawa.