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Rockfall modelling in forested areas : the role of digital terrain model grid cell size
ID
Žabota, Barbara
(
Author
),
ID
Mikoš, Matjaž
(
Author
),
ID
Kobal, Milan
(
Author
)
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MD5: 3B8A0CB1ECD276FFF95C3A1619AA4C6E
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https://www.mdpi.com/2076-3417/11/4/1461
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Abstract
This article examines how digital terrain model (DTM) grid cell size influences rockfall modelling using a probabilistic process-based model, Rockyfor3D, while taking into account the effect of forest on rockfall propagation and runout area. Two rockfall sites in the Trenta valley, NW Slovenia, were chosen as a case study. The analysis included DTM square grid cell sizes of 1, 2, 5, and 10 m, which were extracted from LiDAR data. In the paper, we compared results of rockfall propagation and runout areas, maximum kinetic energy, and maximum passing height between different grid cell sizes and forest/no forest scenario, namely by using goodness-of-fit indices (average index, success index, distance to the perfect classification, true skill statistics). The results show that the accuracy of the modelled shape of rockfall propagation and runout area decreases with larger DTM grid cell sizes. The forest has the important effect of reducing the rockfall propagation only at DTM1 and DTM2 and only if the distance between the source area and forest is large enough. Higher deviations of the maximum kinetic energy are present at DTMs with larger grid cell size, while differences are smaller at more DTMs with smaller grid cell sizes. Maximum passing height varies the most at DTM1 in the forest scenario, while at other DTMs, it does not experience larger deviations in the two scenarios.
Language:
English
Keywords:
rockfall
,
hazard
,
modelling
,
DTM
,
LiDAR
,
forest
,
protective effect
,
grid cell size
Work type:
Article
Typology:
1.01 - Original Scientific Article
Organization:
BF - Biotechnical Faculty
FGG - Faculty of Civil and Geodetic Engineering
Publication status:
Published
Publication version:
Version of Record
Year:
2021
Number of pages:
20 str.
Numbering:
Vol. 11, iss. 4, art. 1461
PID:
20.500.12556/RUL-124816
UDC:
630
ISSN on article:
2076-3417
DOI:
10.3390/app11041461
COBISS.SI-ID:
50777091
Publication date in RUL:
19.02.2021
Views:
767
Downloads:
172
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Record is a part of a journal
Title:
Applied sciences
Shortened title:
Appl. sci.
Publisher:
MDPI
ISSN:
2076-3417
COBISS.SI-ID:
522979353
Licences
License:
CC BY 4.0, Creative Commons Attribution 4.0 International
Link:
http://creativecommons.org/licenses/by/4.0/
Description:
This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
Licensing start date:
05.02.2021
Projects
Funder:
EC - European Commission
Funding programme:
Interreg Alpine Space
Project number:
ASP 635
Acronym:
GreenRisk4ALPs
Funder:
Other - Other funder or multiple funders
Funding programme:
Pahernik foundation
Funder:
ARRS - Slovenian Research Agency
Project number:
P2-0180
Name:
Vodarstvo in geotehnika: orodja in metode za analize in simulacije procesov ter razvoj tehnologij
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