Articles | Volume 6, issue 1
Earth Surf. Dynam., 6, 101–119, 2018
https://doi.org/10.5194/esurf-6-101-2018

Special issue: 4-D reconstruction of earth surface processes: multi-temporal...

Earth Surf. Dynam., 6, 101–119, 2018
https://doi.org/10.5194/esurf-6-101-2018

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 et al.

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Latest update: 26 Feb 2021
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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.