
Brendan RoddyUniversity of Waikato · Department of Earth and Ocean Sciences
Brendan Roddy
Doctor of Philosophy
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11
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Publications
Publications (11)
Waste dumps are the largest feature to remain after the cessation of mining and pose a significant risk in terms of potential risks to the environment, particularly from accelerated erosion. Traditional approaches (such as rehabilitation trials) can take years to yield useful data which may be available after important factors in waste dump stabili...
Berms remain a persistent feature in waste dump landform designs as they are perceived to provide the
benefits of reduced slope length, protection against future batter erosion by partitioning the slope with level
or backsloping berms, and reduced flow velocity. Underpinning this rationale is the belief that the berms will
be a permanent and unchan...
Computer simulations of runoff and erosion are a key element in the design of stable waste dump outer batter profiles. The Water Erosion Prediction Project (WEPP) model is used to develop erosionally stable landform batter surfaces. Although the WEPP model has been widely validated elsewhere, there is a perceived need to similarly validate the mode...
There is a prevailing orthodoxy in the WA mining industry (including consultants and regulators) on the most appropriate approach to designing mine waste landforms to provide an erosionally stable final surface. This approach continues to include use of berms and cross slope ripping.
It is assumed that berms act to quarantine slope segments, and re...
New Zealand's estuaries have high ecological and recreational values which are vulnerable to the impacts of increased sedimentation. The key to mitigating the effects of suspended sediment is the identification of the dominant region and process responsible for sediment generation. As a consequence the landuse activity of exotic forestry has been c...
New Zealand estuaries are sites of ecological, economic, and recreational significance. Estuaries are vulnerable to the impacts of increased erosion as they act as natural sediment traps. The objectives of this study were to; 1) quantify the relative amounts of sediment entering the estuary from the native forest, exotic forest, and agricultural la...
Statistically Verified Composite Fingerprinting (SVCF) has been attracting increased attention to identify catchment erosion sources, but to date has not been applied in a New Zealand setting. A pilot study was undertaken to investigate if different catchment land-uses (native forest, exotic forest, and pastoral agriculture) can be discriminated by...
Managing the impacts of erosion after forest harvesting requires knowledge of erosion sources; rates of sediment transport and storage; as well as losses from the system. We construct a tracer-based (137Cs) sediment budget to quantify these parameters. The budget shows significant redistribution, storage and transport of sediment between landscape...