Development of Three-Dimensional Soil Water Dynamic Flow (3D SWD FLOW) Data Model for Landslide Modelling

To date, 3D geospatial models in landslide studies are gaining less attention than other environment-related studies due to the complex integration of geotechnical and hydrological processes. The current model mostly separates the material failure from propagation due to the complexity of integrating the dynamic process with a computational framework. As for 3D slope stability analysis using DEM necessitates rather complex algorithms aimed at iteratively predicting landslides, which are tedious and yield results that do not reflect their potentialities. Hence, an attempt to model 3D fluid and landslides with an indeterminate spatial extent is required to establish a more comprehensive nature representation model. The 3D SWD FLOW data model was specially designed to represent data from the slope, rainfall and soil water infiltration into a 3D model. The methodology employs cumulative antecedent working rainfall to calculate the rainfall threshold. The factor of safety (FOS) is based on the infinite slope model applied to a theoretically identical model. 3D SWD FLOW comprises resource assessment, landslide identification, landslide analysis, forecast landslide and vulnerability assessment; while the main parameters that trigger landslides include rainfall, infiltration and FOS. 3D SWD FLOW created three primary 3D models for the triggering elements, including models based on B-Rep Solid boundry, Multi-Dimensional Arrays, Random Walk Equation, Volume of Ellipsoid and Consistent Sliding Direction. The resulting 3D SWD FLOW model were visualized through Processing-3 software platform, which indicates one of the first to attempt to model a dynamic natural landslide process with software not explicitly created for 3D models.