Sediments
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Caroline Beamish meets a braided river specialist, and Wahine Toa, on a mission to let our rivers flow.
Fallout from nuclear testing helps reveal the importance of streambank erosion in New Zealand catchments
The obvious and sometimes dramatic nature of streambank erosion suggests that it may be a significant contributor of sediment to New Zealand rivers. Despite this, there have been very few attempts to determine the relative importance of streambank erosion as a source of sediment in New Zealand catchments.
Sediment fingerprinting determines sources of erosion
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.
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Coastal and Estuarine Physical Processes Scientist
Principal Scientist - Coastal and Estuarine Physical Processes