Application of a Novel Automatic Erosion and Deposition Monitoring System at a Channel Bank Site on the Tidal River Trent, U.K.

Lawler, Damian; West, John R.; Couperthwaite, John; Mitchell, Steve

doi:10.1006/ecss.2001.0779

Cited by 33 publications

(27 citation statements)

References 9 publications

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“…The Wharfe site is one of five instrumented with PEEP-3 TCT sensors, three of which were estuarine sites (Lawler et al, 2001). Drainage basin area at Tadcaster is 818 km 2 (Webb et al, 1997), and the basin is rural and resurvey methods were used to pick up spatial erosion patterns.…”

Section: Field Methodsmentioning

confidence: 99%

“…This is especially helpful in highly dynamic environments or scour-and-fill-dominated systems such as semi-arid or tidal channels, or dune systems, where erosion can be concealed by later accretion, and could usefully build on earlier PEEP investigations (e.g. Lawler, 1994;Mitchell et al, 1999;Stott, 1999;Prosser et al, 2000;Lawler et al, 2001). More robust event-based rate information provides a stronger platform for the discrimination of process-dominance hypotheses (e.g.…”

Section: Process Inference Hypothesis Discrimination and Threshold Imentioning

confidence: 98%

“…Photovoltaic signals thus quantify erosional and depositional activity, especially the magnitude, frequency and timing of erosion and deposition events and rates, much more clearly than with manual methods, and this has led to significant improvements in understanding processes of river bank erosion (e.g. Lawler, 1994, Stott, 1999, canal stability (Prosser et al, 2000) and tidal channels Lawler et al, 2001). PEEP advantages and limitations are fully discussed elsewhere (e.g.…”

Section: Making the Tct Concept Operationalmentioning

confidence: 98%

“…PEEP advantages and limitations are fully discussed elsewhere (e.g. Lawler, 1991Lawler, , 1993aLawler et al, 1997aLawler et al, , 2001). Despite being a significant improvement over manual monitoring systems, one limitation is that, being a light-dependent method, there is a delay in the detection of nocturnal events until the following morning when the PEEP sensor is reactivated.…”

Section: Making the Tct Concept Operationalmentioning

confidence: 98%

“…The lack of bank accretion research, in particular, has hindered width modelling (Mosselman, 2000), although some high-resolution tidal channel deposition and erosion rate information has now begun to emerge (e.g. Mitchell et al, 1999;Lawler et al, 2001;Lawler, 2005).…”

Section: Event-based Sediment Dynamics Investigationsmentioning

confidence: 99%

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Defining the moment of erosion: the principle of thermal consonance timing

Lawler

2005

Earth Surf Processes Landf

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Geomorphological process research demands quantitative information on erosion and deposition event timing and magnitude, in relation to fluctuations in the suspected driving forces. This paper establishes a new measurement principle -thermal consonance timing (TCT) -which delivers clearer, more continuous and quantitative information on erosion and deposition event magnitude, timing and frequency, to assist understanding of the controlling mechanisms. TCT is based on monitoring the switch from characteristically strong temperature gradients in sediment, to weaker gradients in air or water, which reveals the moment of erosion. The paper (1) derives the TCT principle from soil micrometeorological theory; (2) illustrates initial concept operationalization for field and laboratory use; (3) presents experimental data for simple soil erosion simulations; and (4) discusses initial application of TCT and perifluvial micrometeorology principles in the delivery of timing solutions for two bank erosion events on the River Wharfe, UK, in relation to the hydrograph.River bank thermal regimes respond, as soil temperature and energy balance theory predicts, with strong horizontal thermal gradients (often > > > > >1 K cm− −1 over 6·8 cm). TCT fixed the timing of two erosion events, the first during inundation, the second 19 h after the discharge peak and 13 h after re-emergence from the flow. This provides rare confirmation of delayed bank retreat, quantifies the time-lag involved, and suggests mass failure processes rather than fluid entrainment. Erosion events can be virtually instantaneous, implying 'catastrophic retreat' rather than 'progressive entrainment'. Considerable potential exists to employ TCT approaches for: validating process models in several geomorphological contexts; assisting process identification and improving discrimination of competing hypotheses of process dominance through high-resolution, simultaneous analysis of erosion and deposition events and driving forces; defining shifting erodibility and erosion thresholds; refining dynamic linkages in event-based sediment budget investigations; and deriving closer approximations to 'true' erosion and deposition rates, especially in self-concealing scour-and-fill systems.

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Section: Field Methodsmentioning

confidence: 99%

Section: Process Inference Hypothesis Discrimination and Threshold Imentioning

confidence: 98%

Section: Making the Tct Concept Operationalmentioning

confidence: 98%

Section: Making the Tct Concept Operationalmentioning

confidence: 98%

Section: Event-based Sediment Dynamics Investigationsmentioning

confidence: 99%

See 3 more Smart Citations

Defining the moment of erosion: the principle of thermal consonance timing

Lawler

2005

Earth Surf Processes Landf

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References

2007

Geomorphology of Upland Peat

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Field techniques for measuring bedrock erosion and denudation

Turowski

Cook

2016

Earth Surf Processes Landf

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Bedrock erosion rates in natural landscapes are usually slow, of the order of millimeters per year or less, and sophisticated techniques have been developed to measure them. Different techniques have proved to be valuable depending on the spatial and temporal scale on which information is needed, on the environment and on the scientific question that is asked. Here, we give an overview of the various methods that have been developed. We introduce their working principles and outline their advantages and disadvantages. Further, we provide comprehensive references to relevant literature, both on the methods and on scientific examples of their application.

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Application of a Novel Automatic Erosion and Deposition Monitoring System at a Channel Bank Site on the Tidal River Trent, U.K.

Cited by 33 publications

References 9 publications

Defining the moment of erosion: the principle of thermal consonance timing

Defining the moment of erosion: the principle of thermal consonance timing

References

Field techniques for measuring bedrock erosion and denudation

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