Modelling the transition between fixed and mobile bed conditions in two-phase free-surface flows: The Composite Riemann Problem and its numerical solution

Rosatti, Giorgio; Zugliani, Daniel

doi:10.1016/j.jcp.2015.01.011

Cited by 13 publications

(12 citation statements)

References 24 publications

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“…• extending the range of applicability of the model, for example following the result presented in Rosatti and Zugliani (2015) for a debris-flow description over mixed fixed-and mobile-bed conditions,…”

Section: Discussion and Future Developmentsmentioning

confidence: 98%

A Web Service ecosystem for high-quality, cost-effective debris-flow hazard assessment

Rosatti

Zorzi

Zugliani

et al. 2018

Environmental Modelling & Software

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In this work, we present WEEZARD, a smart, cost-effective system, aimed at producing, managing and analysing high quality debris-flow simulations to be used in hazard assessments. Developing the system was a challenge because of the complexity and the number of interconnected operations involved in such assessments.The goal was achieved by using a web client-server system, where a set of web services are exposed in a way similar to that used in OGC ® WPS solutions. The new system is composed of a previously developed advanced two-phase debris-flow model (TRENT2D), re-coded as a web service, and all the functionalities necessary to exploit the model, from the management of input and output (also provided as web services) to GIS features and twoand three-dimensional dynamic visualizations. Future developments include the possibility of using approaches such as the "Model as a Service" to furhter increase the accessibility and interoperability of the TRENT2D model.

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Section: Discussion and Future Developmentsmentioning

confidence: 98%

A Web Service ecosystem for high-quality, cost-effective debris-flow hazard assessment

Rosatti

Zorzi

Zugliani

et al. 2018

Environmental Modelling & Software

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“…In the original formulation of the TRENT2D, the movement of the mixture occurs on a mobile bed, i.e., on a bed that can be subject to erosion and deposition during the motion. However, a more recent version of the model [60] also allows the consideration of cases where the mixture flows on a non-erodible bed. In the latter case, the model provides for the possibility of depositing material above the non-erodible bed (thus becoming, at least temporarily erodible), but prevents the bed from reaching, due to erosion, elevation below the level of the non-erodible layer.…”

Section: Debris Flow Modelling: the Trent2d Modelmentioning

confidence: 99%

Back-Analysis of the Abbadia San Salvatore (Mt. Amiata, Italy) Debris Flow of 27–28 July 2019: An Integrated Multidisciplinary Approach to a Challenging Case Study

et al. 2022

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On 27–28 July 2019, in a catchment of the Mt. Amiata area (Italy), an extreme rainfall induced a debris flow, which caused a channeled erosive process just upstream of the Abbadia San Salvatore village, the obstruction of a culvert at the entrance to the urban area, and the subsequent flooding of the village. In this paper, we present the back analysis of this event. The complexity of this case study is due to several peculiar characteristics, but above all, to the clogging of the culvert, a phenomenon difficult to simulate numerically. The methodology used for the reconstruction of the event is based on a multidisciplinary approach. A geological field investigation was carried out to characterize the catchment and assess the availability of debris. Then, a cascade of numerical models was employed to reconstruct the debris flow: the FLO-2D software was used to model the runoff along the hydrographic network while the mobile-bed debris flow TRENT2D model, available through the WEEZARD system, was used to quantify both the erosion and deposition processes that occurred during the event. To simulate the culvert clogging, a novel modelling procedure was developed and applied. Despite the challenging framework, the results, in terms of debris volume, erosion rates, deposition area, and timing of the culvert obstruction, agree reasonably well with the observed data. It is worth noticing that these results were obtained mainly using parameters set a priori, namely calibrated on a physical basis. This proves that the proposed methodology is robust and effective, with good predictive capability. Therefore, it may be considered, according to the European Union (EU) Flood Directive, an “appropriate practice and the best available technology that does not imply excessive costs” to support predictive hazard mapping of situations as the one here considered.

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“…The characteristic polynomial of the ITP-RIW model reads as follows: and the related eigenvalues are equal to those of the debris-flow model used by Rosatti & Zugliani (2015) to describe the transition between the conditions of fixed and mobile bed in a debris flow model, The ITP-RIW model has the same eigenvalues as the FI-RIW approach except for the absence of one eigenvalue equal to the mixture velocity. Hence, the observation derived for the FI-RIW eigenvalues can be extended also to this description: the dimensionless eigenvalues match those of the PI-RIW model only for (see figure 12).…”

Section: Itp-riw Versus Pi-riwmentioning

confidence: 99%

“…and the related eigenvalues are equal to those of the debris-flow model used by Rosatti & Zugliani (2015) to describe the transition between the conditions of fixed and mobile bed 919 A8-47 in a debris flow model,…”

Section: D1 Itp-riw Versus Pi-riwmentioning

confidence: 99%

A mathematical framework for modelling rock–ice avalanches

2021

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Modelling the transition between fixed and mobile bed conditions in two-phase free-surface flows: The Composite Riemann Problem and its numerical solution

Cited by 13 publications

References 24 publications

A Web Service ecosystem for high-quality, cost-effective debris-flow hazard assessment

A Web Service ecosystem for high-quality, cost-effective debris-flow hazard assessment

Back-Analysis of the Abbadia San Salvatore (Mt. Amiata, Italy) Debris Flow of 27–28 July 2019: An Integrated Multidisciplinary Approach to a Challenging Case Study

A mathematical framework for modelling rock–ice avalanches

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