Atmospheric analysis

NIWA has transformed 1.5 million square kilometres of data into the most accurate and detailed map yet of the land underneath the sea around New Zealand.

This national GIS ‘layer’ enables reconnaissance-scale estimation of suspended-sediment yields from New Zealand’s rivers and streams. It has been developed by NIWA in collaboration with Landcare Research.

The need to provide upstream passage facilities for ensuring the long term sustainability of migratory freshwater fish populations is now well recognised.

How may forestry activities increase sediments in waterways?

Plants and trees along the water margins and banks are called riparian vegetation.

Submerged plants have a number of advantages that favour their use as indicators of lake ecological condition.

Piharau/kanakana are an important mahinga kai species and a prized delicacy for many Māori.

NIWA operates about 30 other Maritime New Zealand-certified vessels based at Bream Bay, Auckland, Hamilton, Rotorua, Turangi, Wellington, Nelson, Greymouth, Tekapo, Christchurch, and Dunedin.

Digital copies of all our annual reports published since 2011.

Your task is to create a model of the data to predict the times during the year that a location would be pleasant to visit