EDDA 2.0: integrated simulation of debris flow initiation and dynamics considering two initiation mechanisms

Shen, Ping; Zhang, Li Min; Chen, Hongxin; Fan, Ruilin

doi:10.5194/gmd-11-2841-2018

Cited by 51 publications

(12 citation statements)

References 70 publications

(79 reference statements)

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“…The numerical models for physical processes of debris-flow initiation are very scarce, and there are few attempts to numerically simulate all the processes from the initiation to the subsequent transport and deposition of the debris flow. According to Shen et al (2018), the integrated numerical simulation of the three processes of debris flows remains a challenge to be solved. In addition, it indicates that instead of the initiation process, a predefined empirical hydrograph is used, created based on the estimated volumes of rain runoff and solid source materials, to initiate debris flow.…”

Section: Theoretical Aspects Of Debris Flowsmentioning

confidence: 99%

“…The rheological model used by RAMMS for debris flows is the Voellmy friction fluid model, which divides the friction resistance into two parts: a dry Coulomb-type friction, and a resistance to the square of the velocity or viscous-turbulent friction. Shen et al (2018) presented the integrated numerical model, EDDA 2.0, to simulate the entire process of initiation of debris flow, movement dragging, deposition, and ownership changes; however, the authors indicate that the rheological models used for hyperconcentrated flow and the fully developed debris flow need further study.…”

Section: Theoretical Aspects Of Debris Flowsmentioning

confidence: 99%

“…The volumes of water were determined by calculating the envelope area of flood hydrographs for different return periods. According to the methodology proposed by Quisca (2010), and suggested by Shen et al (2018), volumes of hydrographs of debris flows were obtained for different periods of return. Table 5 shows the estimates of maximum volumes of mud events for different return periods, in the output sections of each of the four streams of Mirave's watershed.…”

Section: Hydrographs and Volume Of The Debris Flow In The Four Streams Of Mirave's Watershed Estimationmentioning

confidence: 99%

See 2 more Smart Citations

Numerical Simulation of Debris Flows of the Catastrophic Event of February 2019 in Mirave – Peru

Savio¹,

Astocahuana²,

Navarro³

2019

Rev. ambiente água

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Debris flows are geophysical phenomena, caused by torrential rain, which occur in mountainous areas, characterized by the detachment of slope and riverbed materials and their consequent dislodge through watersheds and streams. Debris flows usually carry sludge, water and rocks, and can destroy everything in their path. On February 8th, 2019, an event of this type occurred and destroyed Mirave’s community in Peru, which was located in the areas of transport and deposition of debris flows. This research presents the modeling and numerical simulation to reproduce the transport and deposition processes of the debris flow that occurred in Mirave. The initiation process of the debris flow in streams was represented by hydrographs obtained from the estimated rain runoff volumes and solid materials found at each evaluated micro watershed. The numerical simulation results show acceptable results in terms of reproduction of the extension of the affectation and deposition areas of solids related to the studied debris flow. The resulting velocity field shows an adequate representation of the erosion zones observed in the area. The model used for evaluating the disaster risk by debris flows can predict and delimit, with acceptable accuracy, the potentially dangerous areas for a mudslide event. The application of the proposed methodology for assessing the disaster risk due to debris flows at watersheds and streams is useful to understand the extent of debris flow affectation during extreme weather events, as well as to develop emergency plans, and to formulate disaster management policies in Peru or in other countries with similar conditions.

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Section: Theoretical Aspects Of Debris Flowsmentioning

confidence: 99%

Section: Theoretical Aspects Of Debris Flowsmentioning

confidence: 99%

Section: Hydrographs and Volume Of The Debris Flow In The Four Streams Of Mirave's Watershed Estimationmentioning

confidence: 99%

See 1 more Smart Citation

Numerical Simulation of Debris Flows of the Catastrophic Event of February 2019 in Mirave – Peru

Savio¹,

Astocahuana²,

Navarro³

2019

Rev. ambiente água

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“…The integrated modeling of such landslides, from initiation of instability to post-failure flow-like motion remains a challenge. At present, only a few studies have addressed the entire process of rainfall-induced landslide in a single numerical framework [1][2][3]. The seepage-stress coupling and stress-strain modeling of the wet soil are the main difficulties in the integrated modeling [2].…”

Section: Introductionmentioning

confidence: 99%

Integrated numerical study of rainfall-induced landslides, from initiation to propagation using saturation-based rheological model

2022

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This paper presents an integrated two-dimensional numerical framework for simulating rainfall-induced landslides from instability initiation to post-failure flow. To describe the entire 2 process, three steps are considered in this study: 1) a coupled hydro-stability analysis which detects the failure plane using the Finite Element Method (FEM) (pre-failure stage), 2) computing the local rheology of the failed mass (wet sandy soil) based on the water saturation at the onset of failure, using the saturation-based rheological model (transition stage), and 3) a continuum-based propagation analysis which solves the flow of the wet material by employing the Smoothed Particle Hydrodynamics (SPH) method (post-failure stage). Finally, to investigate the influence of rheological model on the post-failure behavior, the computed final deposition profile and flow kinetic energy are compared with those of a viscoplastic model.

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“…It attains large mobility from the enlarged void space saturated with water or slurry. It is a secondary disaster that can be initiated by a landslide, riverbed erosion, and natural dam breaching [1][2]. It has a high destructive power that makes it one of the most catastrophic hazards in mountainous areas [3].…”

Section: Introductionmentioning

confidence: 99%

Designing conduit sabo dam series as a debris flow protection structure

et al. 2021

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A high potential area for landslides was identified upstream of the Air Beras River on Bukit Beriti Besar which was feared to generate debris flow through the Air Beras River. One of the preventive efforts that can be conducted for debris flow is the sabo dam. This study aims to design a series of conduit sabo dams and evaluate the structure stability according to SNI 2851:2015 and Technical Standards and Guidelines for Planning and Design of Sabo Structures (JICA, 2010). By using the design discharge of debris flow of 120 m3/s, the velocity of 5.06 m/s, and the inclination of the riverbed of around 6.16°, the spillway height of the Sabo Dam 1 was determined to be 3 m, while the spillway height of Sabo Dam 1 was 2 m. The Sabo Dam 1 has a height of 10 m and a width of 30 m with a total manageable volume of 49,600 m3 while the Sabo Dam 2 has a height of 10 m and a width of 45 m with a total manageable volume of 91,500 m3. The safety factors of the sabo dam in the debris flow condition were 2.14 for overturning, 1.50 for sliding, and 5.74 for bearing capacity. Based on the result, the conduit sabo dam series effectively controls the destructive power of debris flow.

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EDDA 2.0: integrated simulation of debris flow initiation and dynamics considering two initiation mechanisms

Cited by 51 publications

References 70 publications

Numerical Simulation of Debris Flows of the Catastrophic Event of February 2019 in Mirave – Peru

Numerical Simulation of Debris Flows of the Catastrophic Event of February 2019 in Mirave – Peru

Integrated numerical study of rainfall-induced landslides, from initiation to propagation using saturation-based rheological model

Designing conduit sabo dam series as a debris flow protection structure

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