Water quality maps and information, July to September 2011
Our latest water quality data from around the country, showing results from July to September 2011.
Lakes
Latest news
Latest videos
Retrospective river flows, July to September 2011
What we predicted for July 2011 to September 2011
River flows are likely to be normal in the North Island and north of the South Island, and normal or below normal in the rest of the South Island.
What actually happened during July 2011 to September 2011
River flows were normal to below normal for most of the country, with some above normal river flows in the eastern North Island, eastern Southland and coastal Otago.
Latest seasonal water quality information
Seasonal data from the National River Water Quality Monitoring Network.
New publication: New Zealand constructed wetland guidelines
A new wetlands construction guide has been produced by NIWA's freshwater team.
New additions to the Freshwater web pages
We are regularly adding new material to our website. Here are a few examples.
Research update: Defining acceptable river flow regimes
Abstracting water from rivers is likely to cause changes in river flows, endangering habitats and making supply unreliable for downstream users. NIWA is working to develop river flow rules that can be applied at a local level to prevent these problems.
Research update: Lake Taupo oxygen balance
During summer the concentration of oxygen in the bottom waters, or 'hypolimnion' of Lake Taupo decreases. To find out what factors are responsible for the total oxygen decrease, NIWA scientists have been monitoring the inputs and outputs of oxidisable matter to the lake.
Retrospective river flows, Feb-April 2011
A look at river flows over the last three-month period
River flows update
Follow the link for the latest national water resources data and seasonal outlook.
Water quality maps and information, January to March 2011
Our latest water quality data from around the country, showing results from January to March 2011.
Retrospective river flows, January to March 2011
What we predicted for the first three months of 2011, and what actually happened.
River flows update, April 2011
River flows information for March, and the first quarter of 2011.
Retrospective river flows, August to October 2010
Our last three-monthly predictions, and what actually happened.
River flows update, November 2010
River flows information and outlooks
New toolkit available to aid stream restoration
A new resource has been produced to aid regional councils, community groups, and others keen to monitor and evaluate their stream restoration work.
Investing in real-time water quality monitoring
NIWA has invested in a new tool which continuously monitors a range of water quality parameters and delivers real-time data. Already we have some new revelations about the way diffuse pollutants move into watercourses.
Improving stream water quality: trees, or trees and sheep?
Scientists have recently summarised water quality data from streams in two similar Waikato catchments where, since 2001, the land has been managed quite differently. The results have produced some surprises.
Recent water quality maps and information
Our latest water quality data from around the country.
Retrospective river flows, July to September 2010
Our last three-monthly predictions, and what actually happened.
River flows update, October 2010
Latest information on nationwide river flows.
Pages
All staff working on this subject
