Propagation Modeling of Rainfall-Induced Landslides: A Case Study of the Shaziba Landslide in Enshi, China

Abstract

Geological disasters, especially landslides, frequently occur in Enshi County, Hubei Province, China. On 21 July 2020, a large-scale landslide occurred in Enshi due to continuous rainfall. The landslide mass blocked the Qingjiang River, formed a dammed lake and caused great damage to surrounding roads and village buildings. In this study, the geomechanical properties of the landslide mass were obtained through field surveys. A three-dimensional topography model of the slope was established using the particle flow code (PFC) and the numerical parameters of the model were calibrated. A 3D discrete element model (DEM) was used to simulate the propagation of Shaziba landslide, and the dynamic behavior of the landslide was divided into five stages. The simulation results show that the landslide movement lasted approximately 1000 s. The maximum average velocity of the landslide reached up to 7.5 m/s and the average runout distance was about 1000 m. The simulated morphology of the landslide deposits was in good agreement with the field data. In addition, the influence of effective modulus on the calculation results was analyzed. The results indicate that the propagation behavior of a landslide and the morphology of landslide deposits are closely related to the effective modulus in the contact model of the PFC3D.

Research progress of leachate treatment in waste transfer station

“…This includes the resourcing and energization of valuable elements in the leachate of waste transfer stations as well as the rational use of organic waste gas generated in the treatment process to achieve resource recycling. For example, the magnesium ammonium phosphate crystallization method can be used to recover NH3-N [42]. Finally, in response to the rising emission standards, reuse requirements, and the consideration of treatment costs, research into advanced treatment and combined processes is also an important focus for the future.…”

“…There are also studies on the resource-based recycling of pollutants. Wei et al used the magnesium ammonium phosphate crystallization method to recover NH 3 -N from the leachate of village and township waste transfer stations [42]. The maximum recovery of NH 3 -N was 72.8% under the optimal small-scale test conditions of pH, Mg/N ratio, and GT value of 10.0, 1.2, and 20×10 4 , respectively.…”

Modeling Shallow Landslide Runout Distance in Eocene Flysch Facies Using Empirical–Statistical Models (Western Black Sea Region of Türkiye)

“…For example, based on results obtained during an experiment, the physical model is more suitable for in situ conditions than the numerical model [30]. However, it is demanding for physical models to not only fully reconstruct 3D topography, due to scaling effects [31], but also reflect the dynamic real conditions of field observations [32]. The numerical model's precision is contingent upon the parameters established within the model [25].…”

Failure Mechanism of Anti-Dip Layered Soft Rock Slope under Rainfall and Excavation Conditions

“…This method can record the changes in stress and displacement fields within the slope at any moment in real time and simulate the entire process of slope deformation and instability. Several numerical simulation methods have been successfully applied to the study of anti-dip slopes [27][28][29][30][31][32][33][34][35][36][37]. As early as the 1990s, Orr et al [27] used the finite element analysis method to carry out an instability analysis of the toppling failure of open pit mines, and Coggan et al [28] studied the stability of anti-dip slate stope slopes using the discrete element method.…”