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May 07, 2024
Resources related to
Sediment
Geoff Reid
Sediment is a natural part of our rivers, but too much sediment disrupts ecosystems and harms plants and fish. These resources can help you identify sources of sediment, understand how sediment moves through the landscape, and prevent soil loss.
Showing 1 - 12 of 183 results
Journal Article
An event-based model of soil erosion and sediment transport at the catchment scale
Soil conservation over large areas is expensive and needs to be targeted to obtain maximum benefit for the least cost. In this paper, an event-based…
Journal Article
The Influence of a flood event on the potential sediment control of baseflow phosphorus concentrations in an intensive agricultural catchment
We sampled sediments in an agricultural catchment in Reporoa, New Zealand, before and after a scouring flood event. The tributary was chosen for its low…
Technical Report
Application of a revised SedNetNZ model to the Oreti and Aparima catchments, Southland
This report presents an application of a revised version of the SedNetNZ sediment budget model to the Oreti and Aparima catchments in Southland. We focused…
Journal Article
Grid-based sediment tracing: A new method to determine sediment sources
This grid-based sediment tracing technique improves the precision of source contribution estimates and enhances the granularity of sediment source maps. We test the proposed technique…
Journal Article
Interpreting nesting storm event suspended sediment discharge hysteresis relationships at large catchment scales
Reducing soil erosion and sediment delivery into rivers is a major aim for land management in New Zealand. Therefore, it is important to identify areas…
Journal Article
Dynamics of phosphorus exchange between sediment and water in a gravel-bed river
Phosphorus (P) stores in gravel-bed rivers are released for uptake by periphyton when pH levels exceed 8.5. The Tukituki River has low alkalinity water and…
Journal Article
The biotic contribution to the benthic stream sediment phosphorus buffer
Benthic stream sediments interact strongly with phosphorus (P) and can buffer dissolved reactive P (DRP) concentrations. The sediment P buffer can be measured with the…
Journal Article
Mitigation of phosphorus, sediment and Escherichia coli losses in runoff from a dairy farm roadway
Dairy cow deposits on farm roadways are a potential source of contaminants entering streams. Phosphorus (P), suspended sediment (SS) and Escherichia coli (E. coli) loads…
Journal Article
Quantifying contaminant losses to water from pastoral land uses in NZ III: What could be achieved by 2035?
To meet the water quality outcomes sought by catchment communities and regulators, the losses of nitrogen (N), phosphorus (P) and sediment from dairy and sheep/beef…
Journal Article
Quantifying contaminant losses to water from pastoral land uses in NZ II: The effects of some farm mitigation actions over the past two decades
In New Zealand the primary sector together with central and local government agencies have been promoting measures to mitigate the adverse effect of farming practices…
Journal Article
The impact of cattle grazing and treading on soil properties and the transport of phosphorus, sediment and E. coli in surface runoff from grazed pasture
Contaminant loss from grazed pasture can negatively affect freshwater quality. There is, however, little data on the impact of different levels of grazing/treading on contaminant…
Model
Impacts of grazing on ground cover, soil physical properties and soil loss via surface erosion: A novel geospatial modelling approach
Agricultural expansion and overgrazing are globally recognized as key contributors to accelerated soil degradation and surface erosion, with direct consequences for land productivity, and environmental…