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Impact of a random sequence of debris flows on torrential fan formation
ID
Bezak, Nejc
(
Avtor
),
ID
Sodnik, Jošt
(
Avtor
),
ID
Mikoš, Matjaž
(
Avtor
)
PDF - Predstavitvena datoteka,
prenos
(12,77 MB)
MD5: C887075B88AFE03BCA13AF0F2DE399DF
URL - Izvorni URL, za dostop obiščite
https://www.mdpi.com/2076-3263/9/2/64
Galerija slik
Izvleček
Debris flows with different magnitudes can have a large impact on debris fan characteristics such as height or slope. Moreover, knowledge about the impact of random sequences of debris flows of different magnitudes on debris fan properties is sparse in the literature and can be improved using numerical simulations of debris fan formation. Therefore, in this paper we present the results of numerical simulations wherein we investigated the impact of a random sequence of debris flows on torrential fan formation, where the total volume of transported debris was kept constant, but different rheological properties were used. Overall, 62 debris flow events with different magnitudes from 100 m$^3$ to 20,000 m$^3$ were selected, and the total volume was approximately 225,000 m$^3$. The sequence of these debris flows was randomly generated, and selected debris fan characteristics after the 62 events were compared. For modeling purposes, we applied the Rapid Mass Movement Simulations (RAMMS) software and its debris flow module (RAMMS-DF). The modeling was carried out using (a) real fan topography from an alpine environment (i.e., an actual debris fan in north-west (NW) Slovenia formed by the Suhelj torrent) and (b) an artificial surface with a constant slope. Several RAMMS model parameters were tested. The simulation results confirm that the random sequence of debris flow events has only some minor effects on the fan formation (e.g., slope, maximum height), even when changing debris flow rheological properties in a wide range. After the 62 events, independent of the selected sequence of debris flows, the final fan characteristics were not significantly different from each other. Mann Whitney (MW) tests and t-tests were used for this purpose, and the selected significance level was 0.05. Moreover, this conclusion applies for artificial and real terrain and for a wide range of tested RAMMS model rheological parameters. Further testing of the RAMMS-DF model in real situations is proposed in order to better understand its applicability and limitations under real conditions for debris flow hazard assessment or the planning of mitigation measures.
Jezik:
Angleški jezik
Ključne besede:
debris fans
,
RAMMS
,
numerical modelling
,
debris flow sequence
,
hazard assessment
,
Suhelj fan
Vrsta gradiva:
Članek v reviji
Tipologija:
1.01 - Izvirni znanstveni članek
Organizacija:
FGG - Fakulteta za gradbeništvo in geodezijo
Status publikacije:
Objavljeno
Različica publikacije:
Objavljena publikacija
Leto izida:
2019
Št. strani:
14 str.
Številčenje:
Vol. 9, iss. 2, art. 64
PID:
20.500.12556/RUL-131996
UDK:
556:004(479.4)
ISSN pri članku:
2076-3263
DOI:
10.3390/geosciences9020064
COBISS.SI-ID:
8679265
Datum objave v RUL:
08.10.2021
Število ogledov:
812
Število prenosov:
151
Metapodatki:
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Objavi na:
Gradivo je del revije
Naslov:
Geosciences
Skrajšan naslov:
Geosciences
Založnik:
MDPI
ISSN:
2076-3263
COBISS.SI-ID:
519967769
Licence
Licenca:
CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
Povezava:
http://creativecommons.org/licenses/by/4.0/deed.sl
Opis:
To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.
Začetek licenciranja:
01.02.2019
Sekundarni jezik
Jezik:
Slovenski jezik
Ključne besede:
vršaj
,
RAMMS
,
numerično modeliranje
,
zaporedje drobirskih tokov
,
ocena ogroženosti
,
Suhelj
,
hidrologija
Projekti
Financer:
ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Številka projekta:
J7-8273
Naslov:
Prepoznavanje potencialno nevarnih hudourniških vršajev z metodami geomorfometrije in simulacijami nastanka vršajev
Financer:
Drugi - Drug financer ali več financerjev
Program financ.:
International Programme on Landslides
Številka projekta:
IPL-225
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