A5014752920- Hydrology and Sediment Transport Processes
- Soil erosion and sediment transport
- Flood Risk Assessment and Management
- Hydrology and Watershed Management Studies
- Geological formations and processes
- Hydraulic flow and structures
- Fish Ecology and Management Studies
Macquarie University
2021-2024
The University of Melbourne
2019-2020
Abstract Natural flood management (NFM), a nature‐based solution to mitigation where hydrological and biophysical processes are harnessed reduce flow velocity, erosive energy risk, is an emerging global theme of water river management. The catastrophic 2021 2022 floods in eastern Australia used assess the properties discrete events start investigation whether widespread changes hydrology occurring. We find that most coastal rivers New South Wales (NSW) had noticeable decrease wave celerity...
Abstract Extensive riparian vegetation clearance occurred in many rivers of southeastern Australia throughout the 19th and 20th century, post colonisation. With improvements river management practices, coincident with a period minimal flooding, recovery corridors has been occurring since 1980s all coastal catchments New South Wales (NSW). However, catchment‐by‐catchment spatial pattern temporal trends, trajectories rates vegetative remain unknown. We reconstruct 70‐year time series change...
River recovery is defined as the trajectory of change that a reach takes towards an improved condition. In geomorphic terms, this includes improvement in both physical structure and function river. While there are numerous case studies track river at scale, lack work characterises patterns across diverse types. Here we use ergodic reasoning to quantitatively analyse changes assemblage units (GUs) occur for rivers known be different stages recovery. We aim understand how types occurs. study,...
Abstract Geomorphic units (GUs) are the landforms that make up valley bottom and produced by fluvial processes determine river structure function. Mapping of GUs can be used to interpret type behaviour analyse condition recovery processes. The advancement remote sensing technologies big‐data acquisition enabling development operationalisation tools semi‐automate mapping assemblages across large spatial areas. In this study, we develop a hierarchical method combines landscape classification...
It is well established that riparian trees reduce bank erosion. However, fallen can increase erosion as the flow deflected and accelerated between log its root-plate face, increasing boundary shear stress eroding bank. This contributes to hydraulic variability but also be a concern in restoring wood loads rivers. In this first quantitative study into phenomenon, we develop theoretical model estimate near-bank velocity around single using principles of continuity energy loss for range...
Riparian trees can reduce bank erosion rates, but once a tree falls into river it increase local erosion. However, the influence of multiple logs, that hydraulically interact, on near-bank velocities has not been investigated. This paper reports flume experiments velocity changes and water level produced by in-stream logs with equal unequal spacing. The results suggest caused single log be reduced, even reversed, logs. reduced mainly from wake interference between rather than effect...
Abstract This is the first substantial field measurement of river‐bank erosion around fallen logs in rivers. Whilst numerous studies have established that living trees can stabilize river banks, and cause scour bed, knowledge bank effects from largely restricted to qualitative observations. Recent flume suggest a single log increase near‐bank velocity (and thus erosion) this related blockage ratio distance between bank. However, hydraulic interactions reduce or even decrease velocity. These...
The removal of riparian vegetation and instream wood, as well channelisation, river regulation sediment extraction, has led to significant adjustments metamorphosis in many rivers southeastern Australia throughout the 19th 20th century, post colonisation. With improvements management practice that saw a transition from an engineering approach passive nature-based rehabilitation approach, coincident with period minimal flooding, signs geomorphic vegetative recovery have been detected since...