Freshwater

Many New Zealand lakes are suffering from nutrient enrichment, causing potentially toxic blooms of blue-green algae. NIWA is testing a range of methods to manage phosphorus release from lake sediments – including sediment-capping agents.

The Catchment Land Use for Environmental Sustainability (CLUES) model is being transferred from the ArcMap GIS environment to ArcGIS Pro and we are looking for volunteers to help test the new model interface with a limited Beta release of the model.

Gathering, eating and sharing wild kai (food) has always been a very important part of Māori culture and wellbeing - this research project aimed to characterise the risks associated with consuming kai collected from rivers, lakes and coastlines.

This project involves the development of a computer-based framework for freshwater models. The framework will be tested to proof-of-concept stage.

If the low abundance of fish in your stream is not related to a reduction in habitat, waterquality, flow or the presence of downstream barriers, it might be due to the inability of juvenile fish to enter the stream.

The movements of many juvenile native fish are often hindered by barriers to fish passage such as dams, weirs, falls, tide gates, culverts, screens and high water velocities. The New Zealand Fish Passage Guidelines sets out recommended practice for the design of instream infrastructure to provide for fish passage.

Whom to contact for further information.

How may wind energy generation activities influence sediments in waterways?