Wetlands
Latest news
Aquatic Biosecurity – a year in review
Ensuring ecosystem health/aquatic rehabilitation – a year in review
Nutrient spiralling study in the Tukituki River, Hawkes Bay
Intensive land use increases nutrient runoff to rivers, lakes and estuaries with adverse effects on ecosystems. Determining what combinations of land use and management enable the health and services of these ecosystems to be maintained or restored is a major challenge for councils.
The Kaipara: big research for a big place
Catchment modelling of sediment loads to estuaries
Estuary sedimentation is a continual natural process. Land slope, land use, soil type and rainfall all have significant impacts, and form a complex spatial pattern of sediment generation.
NIWA initiates new information system for urban stormwater quality
River flows - April to June 2012
River flows - April to June 2012
The three month picture (on the right) shows the extreme dryness across most of the country, and the after effect of a wet April over East Cape and Hawkes Bay.
Water quality maps and information, April to June 2012
River temperatures April to June
Autumn river water temperatures were mostly in the range 8 to 16oC and tended to be slightly higher in the north and at lower altitude.
River flows update, May 2010
River flows maps and information for the past month and the past three months.
Invasive aquatic weeds in Micronesia
Invasive aquatic weeds are a problem in other countries as well as New Zealand. NIWA scientists were recently in Micronesia, assessing the risks posed by invasive aquatic weeds to some of the main islands there.