Freshwater

What does science tell us about New Zealand cockles?

Aotearoa-New Zealand’s marine area covers 167,650 square kilometres presenting a staggering distribution of climates, from subtropical to subantarctic waters, to understand and manage.

Specialised monitoring equipment has been installed in Bay of Plenty estuaries to understand whether our coastal wetlands can survive the threat of inevitable sea-level rise.

This guide discusses design principles and provides high-level information about the likely performance of riparian buffers.

New energy efficient streetlights are playing a major role in influencing insect behaviour, says NIWA.

For the first time, satellites have been used to track coastal water health around Aotearoa New Zealand.

Many New Zealand cities and towns have switched over to modern LED street lighting. The move will save on operational costs, but little is known what impact artificial streetlights have on flying freshwater insects which are integral to our waterway ecosystems. NIWA investigated the likely impact as part of a four-year MBIE-funded Smart Idea project.

IrriSET helps farmers to understand the economic viability and environmental efficiency of various irrigation strategies and prioritise their irrigation investments.

Nutrients, sediment, and microbial contaminants are mobilized from urban and agricultural landscapes and enter streams, rivers, lakes and estuaries. These contaminants can degrade water quality, ecological health, and cultural values.

These booklets help provide guidance on the cultivation and restoration of native submerged macrophytes for environmental rehabilitation initiatives in freshwater and saltwater environments.

A new tool giving near real-time snow data has been made available to the public for the first time.

NIWA has updated and restarted a course using a riparian planning tool developed by one of its former chief scientists more than 20 years ago.