Prof Neil Entwistle's Outputs (25)

2D Modelling Of Sediment Dynamics In High Energy Gravel Bed Rivers And Climate Impacted Glacier Fed River Basins (2025)
Thesis

This thesis sets out a novel method of 2D sediment modelling in high energy mountain systems. A new combined methodology using lidar, drone and dGPS survey along with HEC-RAS 2D river simulation has been developed. This methodology has been validated... Read More about 2D Modelling Of Sediment Dynamics In High Energy Gravel Bed Rivers And Climate Impacted Glacier Fed River Basins.

Sediment Entrainment In Two Large Upland Gravel Bed Rivers (2023)
Thesis

The sediment dynamics of river systems are of importance from an ecological, social and engineering viewpoint and are defined by complex relationships of various variables. Numerous threshold theories (such as Bagnolds stream power equation, Hjulstro... Read More about Sediment Entrainment In Two Large Upland Gravel Bed Rivers.

Impacts of river engineering on river channel behaviour : implications for managing downstream flood risk (2020)
Journal Article
flood risk. Water, 12(5), https://doi.org/10.3390/w12051355

Although knowledge of sediment transport has improved over the last 25 years, our understanding of bedload transfer and sediment delivery is still based on a limited set of observations or on models that make assumptions on hydraulic and sediment tra... Read More about Impacts of river engineering on river channel behaviour : implications for managing downstream flood risk.

Impacts of river engineering on river channel behaviour : implications for managing downstream flood risk (2020)
Journal Article

Although knowledge of sediment transport has improved over the last 25 years, our understanding of bedload transfer and sediment delivery is still based on a limited set of observations or on models that make assumptions on hydraulic and sediment tra... Read More about Impacts of river engineering on river channel behaviour : implications for managing downstream flood risk.

Evidence of non-contiguous flood driven coarse sediment transfer and implications for sediment management (2019)
Presentation / Conference
Heritage, G., Entwistle, N., & Milan, D. (2019, September). Evidence of non-contiguous flood driven coarse sediment transfer and implications for sediment management. Presented at 38th IAHR World Congress, Panama City, Panama

We investigate gravel redistribution and morphological response of three headwater streams following the Storm
Desmond floods of December 2015. Reactive management of the watercourses following the flooding
concentrated on removal of gravel and cle... Read More about Evidence of non-contiguous flood driven coarse sediment transfer and implications for sediment management.

Drone based quantification of channel response to an extreme flood for a piedmont stream (2019)
Journal Article

The influence of extreme floods on the form and functioning of upland systems has concentrated on the erosive impact of these flows. They are seen to be highly competent with coarse sediment transport rates limited by upstream supply and moderated by... Read More about Drone based quantification of channel response to an extreme flood for a piedmont stream.

Ecohydraulic modelling of anabranching rivers (2019)
Journal Article

In this paper we provide the first quantitative evidence of the spatial complexity of habitat diversity across the flow regime for locally anabranching channels, and their potential increased biodiversity value in comparison to managed single-thread... Read More about Ecohydraulic modelling of anabranching rivers.

Small unmanned aerial model accuracy for photogrammetrical fluvial bathymetric survey (2019)
Journal Article
Entwistle, N., & Heritage, G. (2019). Small unmanned aerial model accuracy for photogrammetrical fluvial bathymetric survey. Journal of Applied Remote Sensing, 13(1), 014523. https://doi.org/10.1117/1.JRS.13.014523

Fluvial systems offer a challenging and varied environment for topographic survey, displaying a rapidly varying morphology, vegetation assemblage and degree of submergence. Traditionally theodolite or GPS based systems have been used to capture cross... Read More about Small unmanned aerial model accuracy for photogrammetrical fluvial bathymetric survey.

Multi-Scale detection, mapping, and modelling geomorphic change in gravel-bed rivers with UAV remote sensing (2019)
Thesis
Scott, R. Multi-Scale detection, mapping, and modelling geomorphic change in gravel-bed rivers with UAV remote sensing. (Thesis). University of Salford

Fluvial science is in particular need of surveying tools which can rapidly and accurately capture topographic data. The use of low-cost, consumer grade UAV (unmanned aerial vehicle) systems and Structure from Motion (SfM) processing methods has seen... Read More about Multi-Scale detection, mapping, and modelling geomorphic change in gravel-bed rivers with UAV remote sensing.

Meltwater temperature in streams draining Alpine glaciers (2018)
Journal Article

Water temperature is of considerable importance with respect to lotic habitats. Water temperature influences physical, chemical and biological conditions within river environments and is, therefore, a key determiner of the health of a river. Climate... Read More about Meltwater temperature in streams draining Alpine glaciers.

Recent changes to floodplain character and functionality in England (2018)
Journal Article

Regime analysis suggests that temperate alluvial watercourses overtop their banks on average once every 1.5 years transferring water and sediment across the valley floor to form floodplains helping maintain a strong hydrological connection between in... Read More about Recent changes to floodplain character and functionality in England.

Quantifying and contextualising cyclone-driven, extreme flood magnitudes in bedrock-influenced dryland rivers (2018)
Journal Article

In many drylands worldwide, rivers are subjected to episodic, extreme flood events and associated sediment stripping. These events may trigger transformations from mixed bedrock-alluvial channels characterised by high geomorphic and ecological divers... Read More about Quantifying and contextualising cyclone-driven, extreme flood magnitudes in bedrock-influenced dryland rivers.

Flood energy dissipation in anabranching channels (2018)
Journal Article
Entwistle, N., Heritage, G., & Milan, D. (2018). Flood energy dissipation in anabranching channels. River Research and Applications, 34(7), 709-720. https://doi.org/10.1002/rra.3299

This study examines the character of developing anabranched channel networks on the River Wear, north England using metre-scale aerial LiDAR. DSM-DTM interpretation reveals a well-developed vegetation structure and a locally diverse terrain, dominate... Read More about Flood energy dissipation in anabranching channels.

Morphodynamics of bedrock-influenced dryland rivers during extreme floods : insights from the Kruger National Park, South Africa (2018)
Journal Article
Milan, D., Heritage, G., Tooth, S., & Entwistle, N. (2018). Morphodynamics of bedrock-influenced dryland rivers during extreme floods : insights from the Kruger National Park, South Africa. Geological Society of America Bulletin, 130(11-12), 1825-1841. https://doi.org/10.1130/B31839.1

High-magnitude flood events are among the world’s most widespread and significant natural hazards and play a key role in shaping river channel–floodplain morphology and riparian ecology. Development of conceptual and quantitative models for the respo... Read More about Morphodynamics of bedrock-influenced dryland rivers during extreme floods : insights from the Kruger National Park, South Africa.

Morphodynamic simulation of sediment deposition patterns on a recently stripped bedrock anastomosed channel (2018)
Journal Article
channel. Proceedings of the International Association of Hydrological Sciences, 377, 51-56. https://doi.org/10.5194/piahs-377-51-2018

Some mixed bedrock-alluvial dryland rivers are known to undergo cycles of alluvial building during low flow periods, punctuated by stripping events during rare high magnitude flows. We focus on the Olifants River, Kruger National Park, South Africa,... Read More about Morphodynamic simulation of sediment deposition patterns on a recently stripped bedrock anastomosed channel.

Recent remote sensing applications for hydro and morphodynamic monitoring and modelling (2018)
Journal Article
morphodynamic monitoring and modelling. Earth Surface Processes and Landforms, 43(10), 2283-2291. https://doi.org/10.1002/esp.4378

It is not new to recognise that data from remote sensing platforms is transforming the way we characterise and analyse our environment. The ability to collect continuous data spanning spatial scales now allows geomorphological research in a data rich... Read More about Recent remote sensing applications for hydro and morphodynamic monitoring and modelling.

An evaluation DEM accuracy acquired using a small unmanned aerial vehicle across a riverine environment (2017)
Journal Article
unmanned aerial vehicle across a riverine environment. International journal of new technology and research, 3(7), 43-48

Fluvial systems offer a challenging and varied environment for topographic survey, displaying a rapidly varying morphology, diversevegetation assemblage and varying degree of submergence. Traditionally theodolite or GPS based systems have been used t... Read More about An evaluation DEM accuracy acquired using a small unmanned aerial vehicle across a riverine environment.

Floodplains : the forgotten and abused component of the fluvial system (2016)
Journal Article
Heritage, G., Entwistle, N., & Bentley, S. (2016). Floodplains : the forgotten and abused component of the fluvial system. https://doi.org/10.1051/e3sconf/20160713007

River restoration is strongly focussed on in-channel initiatives driven by fisheries interests and a continued
desire for river stability. This contrasts greatly with the inherently mobile nature of watercourses. What is often
overlooked is the fac... Read More about Floodplains : the forgotten and abused component of the fluvial system.

Radiometric calibration of a dual-wavelength terrestrial laser scanner using neural networks (2016)
Journal Article

The Salford Advanced Laser Canopy Analyser (SALCA) is a unique dual-wavelength full-waveform terrestrial laser scanner (TLS) designed to measure forest canopies. This paper has two principle objectives, first to present the detailed analysis of the r... Read More about Radiometric calibration of a dual-wavelength terrestrial laser scanner using neural networks.

Long-term flood controls on semi-arid river form : evidence from the Sabie and Olifants rivers, eastern South Africa (2015)
Journal Article
Heritage, G., Tooth, S., Entwistle, N., & Milan, D. (2015). Long-term flood controls on semi-arid river form : evidence from the Sabie and Olifants rivers, eastern South Africa. Proceedings of the International Association of Hydrological Sciences, 367, 141-146. https://doi.org/10.5194/piahs-367-141-2015

Rivers in the Kruger National Park, eastern South Africa, are characterised by bedrock-influenced ‘macrochannels’ containing variable alluvial thicknesses and riparian vegetation assemblages. Evidence from the Sabie and Olifants rivers suggests that... Read More about Long-term flood controls on semi-arid river form : evidence from the Sabie and Olifants rivers, eastern South Africa.