Sediments
Latest news
Our work
Latest videos
NIWA scientists have used two sediment ‘fingerprinting’ techniques to identify the contribution of the major sediment sources by erosion processes and land use in an Auckland catchment.
Slowing the mud invasion
New Zealand's estuaries were once sandy, forest-lined gems.
Reducing sedimentation
According to Dr Andrew Swales, an estuarine physical processes scientist who leads NIWA’s Catchments to Estuaries programme, New Zealand is particularly susceptible to erosion due to the country’s steep lands.
Using new laser technology to measure bank erosion
Fine sediment is NZ’s most widespread contaminant, degrading ecosystems and impairing recreational, cultural and aesthetic values in our rivers, estuaries, and coastal seas.
Compound Specific Stable Isotope tracing of sediment sources - tools to manage a sticky problem in New Zealand’s freshwaters and estuaries
Fine sediment is New Zealand’s most widespread water contaminant, degrading ecosystems, infilling dams and reservoirs and impairing recreational, cultural and aesthetic values in our rivers, estuaries and coastal seas.
Water Quality maps, July to September 2012
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
Fine sediment runoff from deforested and disturbed catchments is recognised by management agencies as being the principal threat to New Zealand's estuarine ecosystems.
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.
Tracking water age in hydrological models
Carbon Cycle Diagram
Pages
All staff working on this subject
Coastal and Estuarine Physical Processes Scientist
Principal Scientist - Coastal and Estuarine Physical Processes