13 Nov 2019
13 Nov 2019
Rockfall modelling in forested areas: the role of digital terrain model spatial resolution
- 1Department of Forestry and Forest Renewable Resources, Biotechnical Faculty, University of Ljubljana, Večnapot 83, 1000 Ljubljana, Slovenia
- 2Faculty of Civil and Geodetic Engineering, University of Ljubljana, Jamova cesta 2, 1000 Ljubljana, Slovenia
- 3Department of Forestry and Forest Renewable Resources, Biotechnical Faculty, University of Ljubljana, Večna pot 83, 1000 Ljubljana, Slovenia
- 1Department of Forestry and Forest Renewable Resources, Biotechnical Faculty, University of Ljubljana, Večnapot 83, 1000 Ljubljana, Slovenia
- 2Faculty of Civil and Geodetic Engineering, University of Ljubljana, Jamova cesta 2, 1000 Ljubljana, Slovenia
- 3Department of Forestry and Forest Renewable Resources, Biotechnical Faculty, University of Ljubljana, Večna pot 83, 1000 Ljubljana, Slovenia
Abstract. This article examines how digital terrain model (DTM) spatial resolution influences rockfall modelling using a probabilistic process-based model, RockyFor3D, while taking into account the effect of forest on rockfall propagation and runout area. A rockfall site in the Trenta valley, NW Slovenia, was chosen as a case study. The analysis included DTM spatial resolutions of 1 m, 2 m, 5 m, 10 m, 12.5 m and 25 m, based on lidar data. The highest spatial resolution (1 m) was used to calibrate the surface roughness coefficients of the model while also taking into account the effect of forest since it shapes the rockfall propagation and runout area. The results of the calibration runs were evaluated using goodness-of-fit indices, and the best set of parameters were further used for modelling rockfalls with and without the effect of forest for all spatial resolutions. Accuracy statistics were used to validate the modelled rockfall propagation and runout area for each spatial resolution, with/without the effect of forest. Finally, modelling outputs, such as the mean of the maximum and maximum kinetic energy, the number of block passes and forest parameters in the rockfall propagation area, were compared.
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Preprint
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Barbara Žabota et al.
Interactive discussion


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RC1: 'review Zabota et al 2019', Anonymous Referee #1, 20 Nov 2019
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AC1: 'Autour comments - Referee#1', M. Kobal, 09 Apr 2020
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AC1: 'Autour comments - Referee#1', M. Kobal, 09 Apr 2020
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RC2: 'Review of "Rockfall modelling in forested areas: the role of digital terrain model spatial resolution" by Žabota et al.', Thierry Oppikofer, 27 Feb 2020
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AC2: 'Autour comments - Referee#2', M. Kobal, 09 Apr 2020
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AC2: 'Autour comments - Referee#2', M. Kobal, 09 Apr 2020
Interactive discussion


-
RC1: 'review Zabota et al 2019', Anonymous Referee #1, 20 Nov 2019
-
AC1: 'Autour comments - Referee#1', M. Kobal, 09 Apr 2020
-
AC1: 'Autour comments - Referee#1', M. Kobal, 09 Apr 2020
-
RC2: 'Review of "Rockfall modelling in forested areas: the role of digital terrain model spatial resolution" by Žabota et al.', Thierry Oppikofer, 27 Feb 2020
-
AC2: 'Autour comments - Referee#2', M. Kobal, 09 Apr 2020
-
AC2: 'Autour comments - Referee#2', M. Kobal, 09 Apr 2020
Barbara Žabota et al.
Barbara Žabota et al.
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