Case Study: Numerical Simulations of Debris Flow below Stože, Slovenia

Četina, Matjaž; Rajar, Rudi; Hojnik, Tomaž; Zakrajšek, Majda; Krzyk, Mario; Mikoš, Matjaž

doi:10.1061/(asce)0733-9429(2006)132:2(121)

Cited by 35 publications

(8 citation statements)

References 14 publications

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“…The second phase of the wet debris flow was investigated by applying debris flow numerical modelling in order to assess debris flow hazards in the area, under the assumption that potential debris flows can be triggered on the Stože slope (Fazarinc 2002;Hojnik et al 2001;Četina et al 2006). The triggering phase was not investigated in detail, and the results of such a study that used landslide-triggering simulation would be useful for investigating potential landslides as debris flow sources.…”

Section: Stože Landslide Triggering Simulation Using Ls-rapid Simulatmentioning

confidence: 99%

Advances in Landslide Research

Borgatti¹

2018

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The Regional Symposium on Landslides in the Adriatic-Balkan Region (ReSyLAB) is a biannual event, organized by the Adriatic-Balkan Network of the International Consortium on Landslides, Kyoto, Japan (ICL, http://icl.iplhq.org/). The 3 rd ReSyLAB in Ljubljana 2017 followed two previous successful symposia in Zagreb, Croatia (1 st ReSyLAB 2013) and Belgrade, Serbia (2 nd ReSyLAB 2015). A regional symposium aims specifically to strengthen the cooperation of the ICL members in the region and generally among the network of stakeholders involved in landslide research and landslide risk reduction. The next, 4 th ReSyLAB is scheduled for October 2019 and is to be held in Sarajevo, Bosnia and Hercegovina.

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Section: Stože Landslide Triggering Simulation Using Ls-rapid Simulatmentioning

confidence: 99%

Advances in Landslide Research

Borgatti¹

2018

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“…[9,18,38]. Fewer studies applied quantitative measures for the comparison between reference and simulation, e.g.…”

Section: Reference Variables Of Interestmentioning

confidence: 99%

Evaluation concepts to compare observed and simulated deposition areas of mass movements

2017

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The simulation of geophysical mass flows, including debris flows, rock and snow avalanches, has become an important tool in engineering hazard assessment. Especially the runout and deposition behaviour of observed and expected mass flows are of interest. When being confronted with the evaluation of model performance and sensitivity, there are no standard, objective approaches. In this contribution, we review methods that have been used in literature and outline a new approach to quantitatively compare 2D simulations of observed and simulated deposition pattern. Our proposed method is based on the comparison of normalized partial areas which can be plotted in a ternary diagram to visualize the degree of over-and under-estimation. Results can be summed up by a single metric between -1 (no fit) and 1 (perfect fit). This study shall help developers and end-users of simulation models to better understand model behaviour and provides a possibility for comparison of model results, independent of simulation platform and type of mass flow.

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“…The rheological model adopted in the FLO-2D is a well-known quadratic shear stress model which can describe the continuum of flow regimes from viscous to turbulent/dispersive flow (O'Brien et al, 1993). This model can avoid the modelling problem of not knowing the flow regime in advance (Cetina et al, 2006). FLO-2D has been successfully used for practical cases of debris flow simulations by many researchers (Julien and O'Brien, 1997;Garcia and Lopez, 2005;Lin et al, 2005;Cetina et al, 2006).…”

Section: Numerical Modelmentioning

confidence: 99%

“…This model can avoid the modelling problem of not knowing the flow regime in advance (Cetina et al, 2006). FLO-2D has been successfully used for practical cases of debris flow simulations by many researchers (Julien and O'Brien, 1997;Garcia and Lopez, 2005;Lin et al, 2005;Cetina et al, 2006). O'Brien et al (2006) also reported that FLO-2D has been applied in a list of countries including the United States, Italy, Switzerland, Austria, Mexico, Ecuador, Venezuela, South Korea, Taiwan and Thailand.…”

Section: Numerical Modelmentioning

confidence: 99%

Applications of simulation technique on debris-flow hazard zone delineation: a case study in Hualien County, Taiwan

Hsu¹,

Chiou

Lin

et al. 2010

Nat. Hazards Earth Syst. Sci.

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Abstract. Debris flows pose severe hazards to communities in mountainous areas, often resulting in the loss of life and property. Helping debris-flow-prone communities delineate potential hazard zones provides local authorities with useful information for developing emergency plans and disaster management policies. In 2003, the Soil and Water Conservation Bureau of Taiwan proposed an empirical model to delineate hazard zones for all creeks (1420 in total) with potential of debris flows and utilized the model to help establish a hazard prevention system. However, the model does not fully consider hydrologic and physiographical conditions for a given creek in simulation. The objective of this study is to propose new approaches that can improve hazard zone delineation accuracy and simulate hazard zones in response to different rainfall intensity. In this study, a two-dimensional commercial model FLO-2D, physically based and taking into account the momentum and energy conservation of flow, was used to simulate debris-flow inundated areas.Sensitivity analysis with the model was conducted to determine the main influence parameters which affect debris flow simulation. Results indicate that the roughness coefficient, yield stress and volumetric sediment concentration dominate the computed results. To improve accuracy of the model, the study examined the performance of the rainfallrunoff model of FLO-2D as compared with that of the HSPF (Hydrological Simulation Program Fortran) model, and then the proper values of the significant parameters were evaluated through the calibration process. Results reveal that the HSPF model has a better performance than the FLO-2D model at peak flow and flow recession period, and the volumetric sediment concentration and yield stress can be estimated by the channel slope. The validation of the model for Correspondence to: S. M. Hsu (shihmeng@sinotech.org.tw) simulating debris-flow hazard zones has been confirmed by a comparison of field evidence from historical debris-flow disaster data. The model can successfully replicate the influence zone of the debris-flow disaster event with an acceptable error and demonstrate a better result than the empirical model adopted by the Soil and Water Conservation Bureau of Taiwan.

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Case Study: Numerical Simulations of Debris Flow below Stože, Slovenia

Cited by 35 publications

References 14 publications

Advances in Landslide Research

Advances in Landslide Research

Evaluation concepts to compare observed and simulated deposition areas of mass movements

Applications of simulation technique on debris-flow hazard zone delineation: a case study in Hualien County, Taiwan

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