The Standardised Precipitation Index (SPI) is a simple measure of drought (and also of very wet conditions) and is based solely on the accumulated precipitation for a given time period.

An overview of what the SHMAK kit comprises, and various uses for it.

Find out more about submerged aquatic plant species.

Instrument Systems is a specialised technology-focused consulting group within NIWA.

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

A regional climatology is a summary of the typical weather and climate of a region, based on historical data observations made at climate stations located within the region.

Whitebait are the juveniles of five species of galaxiidae, a family of fish confined to the Southern Hemisphere.

Chemical contaminants are chemicals toxic to plants and animals in waterways.

Atlantis is a 3D, spatially-explicit, trophodynamic ecosystem model that integrates biology, physics, chemistry and human impacts to provide a synoptic view of marine ecosystem function.

Some simple steps to minimise the effects of aquaculture activities on water quality and mahinga kai.

How may the activities of the mining industry influence water resources?