Earth Surface Dynamics
Earth Surface Dynamics
ESurf
Articles | Volume 6, issue 1
Articles | Volume 6, issue 1
https://doi.org/10.5194/esurf-6-101-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
Special issue:
https://doi.org/10.5194/esurf-6-101-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 6, issue 1
Research article
 | 
26 Feb 2018
Research article |  | 26 Feb 2018

Optimising 4-D surface change detection: an approach for capturing rockfall magnitude–frequency

Jack G. Williams, Nick J. Rosser, Richard J. Hardy, Matthew J. Brain, and Ashraf A. Afana

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Short summary
We present a method to analyse surface change using 3-D data collected at hourly intervals. This is applied to 9000 surveys of a failing rock slope, acquired over 10 months. A higher proportion and frequency of small rockfall is observed than in less-frequent (e.g. monthly) monitoring. However, quantifying longer-term erosion rates may be more suited to less-frequent data collection, which contains lower accumulative errors due to the number of surveys and the lower proportion of small events.
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4-D reconstruction of earth surface processes: multi-temporal...