Freshwater

NIWA is developing a national river flow forecasting tool for New Zealand that aims to support and strengthen our planning for and response to extreme rainfall events.

Bottom lining is the installation of a flexible covering over the top of beds of aquatic weeds, similar to using weed matting in home gardens. The lining is held in place by weights (e.g., rocks or sandbags) or by pinning. This control method is also called ‘benthic barriers’.

The project aim was to harness the filter-feeding capacity of native freshwater mussels on rafts to assist in lake restoration.

Irrigation Insight is a joint industry programme funded by MBIE to examine, on working farms, the ease and effectiveness of using high-resolution weather forecasting, production potential, and drainage estimations for on-farm water management.

The Inner Hauraki Gulf/Tīkapa Moana ecosystem is facing proliferations of algae, de-oxygenation, reduced pH (acidification), reduced water clarity, and muddier sediments arising from historical and future land-derived contaminant inputs.

Report: Trends analysis for selected indicators of Waikato River health and wellbeing 2010-2019

The Check Clean Dry Campaign aims to stop the spread of freshwater pests by encouraging people going through more than one waterway to check, clean and dry their gear in between.

Alex Fear looks at the Cultural Keystones Species research programme, a research partnership that grew out of the vision of a Ngāti Hau kaumatua.

From the rocky shores of Wellington’s South Coast to the icy waters of Antarctica, NIWA scientists are combining drone technology with advanced computer skills to map, measure and analyse the natural environment as never before. Campbell Gardiner explains.

Flood flows on the Buller River this month were the largest of any river in Aotearoa New Zealand in almost 100 years, NIWA measurements show.

The Murchison mountains SIN station is located at 1140 m elevation in Fiordland National Park. Because of the low elevation, snow often comes and goes throughout the winter season. Snow records start in 2012.

Castle Mount electronic weather station is at 2000 m elevation on an exposed site above the Milford Track. Records here begin in 2012. Strong winds limit snow accumulation during the winter.