Digital terrain models and mathematical modelling of debris flows

Sodnik, Jošt; Vrečko, Anja; Podobnikar, Tomaž; Mikoš, Matjaž

doi:10.15292/geodetski-vestnik.2012.04.826-837

Cited by 8 publications

(4 citation statements)

References 3 publications

(3 reference statements)

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“…This was due to the substantial negative value of the MD, as shown in Table 2. The inaccuracy of the results obtained adopting the TINITALY DEM was consistent with the ones obtained by Sodnik et al 2012 [46] adopting public DEMs. This outcome could help the flood modelers to understand the limitation of using largely and freely available DEMs, usually affected by systematic errors, in small basins characterized by relatively narrow floodplain that would require detailed topography.…”

Section: Inundation Modeling and Mapping Comparisonsupporting

confidence: 89%

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UAV-DEMs for Small-Scale Flood Hazard Mapping

Annis

Nardi

Petroselli

et al. 2020

Water

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Devastating floods are observed every year globally from upstream mountainous to coastal regions. Increasing flood frequency and impacts affect both major rivers and their tributaries. Nonetheless, at the small-scale, the lack of distributed topographic and hydrologic data determines tributaries to be often missing in inundation modeling and mapping studies. Advances in Unmanned Aerial Vehicle (UAV) technologies and Digital Elevation Models (DEM)-based hydrologic modeling can address this crucial knowledge gap. UAVs provide very high resolution and accurate DEMs with low surveying cost and time, as compared to DEMs obtained by Light Detection and Ranging (LiDAR), satellite, or GPS field campaigns. In this work, we selected a LiDAR DEM as a benchmark for comparing the performances of a UAV and a nation-scale high-resolution DEM (TINITALY) in representing floodplain topography for flood simulations. The different DEMs were processed to provide inputs to a hydrologic-hydraulic modeling chain, including the DEM-based EBA4SUB (Event-Based Approach for Small and Ungauged Basins) hydrologic modeling framework for design hydrograph estimation in ungauged basins; the 2D hydraulic model FLO-2D for flood wave routing and hazard mapping. The results of this research provided quantitative analyses, demonstrating the consistent performances of the UAV-derived DEM in supporting affordable distributed flood extension and depth simulations.

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Section: Inundation Modeling and Mapping Comparisonsupporting

confidence: 89%

“…LiDAR DEMs are usually characterized by high vertical accuracy (e.g., 0.1-0.2 m of RMSE) that is considered comparable with the sensors' noise generated by the microtopographic features [54]. For this reason, LiDAR can be considered a good benchmark for comparing the performances of flood simulations derived from other DEM sources [46].…”

Section: Dems Comparisonmentioning

confidence: 99%

UAV-DEMs for Small-Scale Flood Hazard Mapping

Annis

Nardi

Petroselli

et al. 2020

Water

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“…DMV 5 was chosen for our project over the DMV 12.5 because of better spatial resolution, although some of the past studies showed that both elevation models are useless for more precise mathematical modelling (e.g. Sodnik et al, 2009). Since this paper describes complete torrents, from springs to confluences with larger streams, good approximations of the longitudinal profiles can be obtained already by using DMV 5 (Mohorič, 2015).…”

Section: Methodsmentioning

confidence: 99%

Longitudinal profies of torrential channels in the Western Karavanke mountains

Mohorič¹,

Grigillo²,

Auflič³

et al. 2016

Geologija

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From the national digital elevation model DMV 5 of the Western Karavanke longitudinal profiles of fiftythree torrents were extracted. Longitudinal profiles of torrential channels in study area have generally convex sections and do not correspond to equilibrium state. In this paper, changes in lithology across faults and other potential influences are discussed as possible cause for observed convex longitudinal profiles. Some typical cases where it has been found, that convex sections could be result of faults, are graphically showed. Also lithology of torrential stream bed could be one of main factors for convexity. This applies in particular if the torrent crosses from soft to solid rock. IzvlečekIz državnega digitalnega modela višin DMV 5 območja Zahodnih Karavank so bili določeni vzdolžni profili 53 hudourniških strug. Vzdolžni profili hudournikov imajo večinoma odsekoma konveksno obliko in ne ustrezajo pogojem ravnovesnega stanja. V članku so kot možni vzroki za konveksnost vzdolžnih profilov obravnavane spremembe v litologiji preko prelomov in nekateri drugi potencialni dejavniki. Grafično so prikazani posamezni značilni primeri, kjer je bilo ugotovljeno, da so lahko konveksni odseki vzdolžnih profilov hudouniških strug posledica prelomov. Prav tako se je ugotovilo, da je lahko litologija podlage dna hudouniške struge eden izmed glavnih razlogov za pojavljanje konveksnih odsekov. To velja še posebej za primere, kjer hudournik preide iz mehkih v trdne kamnine.

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“…The Bela torrential fan was classified as a transitional fan, where debris flows are possible. For debris flow modelling, a Flo 2-dimensional model was used with different numerical square grids generated from digital elevation models (Sodnik et al, 2009(Sodnik et al, , 2012(Sodnik et al, , 2013Sodnik & Mikoš, 2018;Bezak et al, 2020). The calculated results showed that the estimated inundated area ranges between 118 and 145 m² and the average maximum flow depth ranges from 0.6 to 1.2 m, depending on the square grid applied.…”

Section: An Overview Of Past Researchmentioning

confidence: 99%

Review of the research and evolution of landslides in the hinterland of Koroška Bela settlement (NW Slovenia)

PETERNEL¹,

ŠEGINA²,

JEŽ³

et al. 2022

Geologija

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This paper gives an overview of landslide research and the activity of landslides located above the Koroška Bela settlement in Northwest Slovenia. There are several landslides in this area and they pose a direct threat to the settlement below. The settlement is very densely populated (about 2,100 inhabitants) and has well-developed industry and infrastructure. It is built on deposits from past debris flows, indicating that large slope mass movements have occurred in the past. In this regard, the hinterland of Koroška Bela has been investigated since 2006, within the framework of various research, technical and European projects. The most extensive geological and geotechnical investigations were carried out after April 2017, when part of the Čikla landslide collapsed and mobilised into a debris flow. All of the investigations which have been carried out over the years revealed that the hinterland of Koroška Bela is characterised by high landslide activity due to geological, hydrogeological and tectonic conditions. In order to protect people and their property, it is essential to implement a holistic mitigation measure which includes remediation works (drainage works, debris flow breaker, etc.) and non-structural measures (monitoring system, early warning system, risk management, etc.). Regular and continuous monitoring of all landslides is also crucial to observe the landslide dynamics and evaluate the effectiveness of structural mitigation measures.

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Digital terrain models and mathematical modelling of debris flows

Cited by 8 publications

References 3 publications

UAV-DEMs for Small-Scale Flood Hazard Mapping

UAV-DEMs for Small-Scale Flood Hazard Mapping

Longitudinal profies of torrential channels in the Western Karavanke mountains

Review of the research and evolution of landslides in the hinterland of Koroška Bela settlement (NW Slovenia)

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