Code and Data for: Mechanically consistent inversion of landslide slip surface geometry by integrating time-series InSAR observations and numerical modeling

=============================================================================Dataset for: Mechanically consistent inversion of landslide slip surface geometry by integrating time-series InSAR observations and numerical modeling============================================================================= # OverviewThis repository contains the source code, numerical model geometries, InSAR deformation inputs, and validation datasets required to reproduce the results presented in the associated manuscript. To facilitate peer review and future research, the files are systematically organized into two primary case studies: the Bajiaocun landslide (a data-sparse scenario utilizing single-orbit radar) and the Xishancun landslide (a data-rich scenario utilizing dual-orbit radar for methodological comparison). # File Structure and Detailed Descriptions -----------------------------------------------------------------------------1. Bajiaocun Landslide Case (Data-Sparse Scenario & Physical Validation)-----------------------------------------------------------------------------* Bajiaocun_InSAR_Deformation_Map_ASC_Track.csv Contains the processed single-orbit (Ascending) Line-of-Sight (LOS) deformation velocity field covering the landslide area. * profile_2-2_.dxf The AutoCAD DXF file containing the 2D topographical and geological boundary coordinates of profile 2-2', which was imported into FLAC3D to construct the numerical mesh. * Bajiaocun_Dataset_Inversion_Fitting.csv Records the spatial coordinates, observed InSAR displacements, simulated model displacements, and the final fitting residuals (in mm) for the monitoring points along the profile. * Bajiaocun_Dataset_Borehole_Validation.csv Contains the independent geotechnical borehole records. It explicitly lists the inverted slip surface depths and the actual measured depths at specific borehole locations (e.g., ZK2, ZK7, etc.) used for absolute physical validation. -----------------------------------------------------------------------------2. Xishancun Landslide Case (Methodological Comparison & Dual-Orbit Integration)-----------------------------------------------------------------------------* Xishancun_Profile_AA'_InSAR_Data.csv Contains the extracted dual-orbit (Ascending and Descending) InSAR deformation velocities, along with their spatial coordinates, distributed along the continuous A-A' profile. * Xishancun_Optimized_Control_Points_AA'.csv Contains the final optimized spatial coordinates (X_Ctrl, Z_Ctrl) of the Akima spline control points, which mathematically define the inverted basal slip surface along the A-A' profile. * Xishancun_Profile_1_1'_InSAR_Data.csv Contains the extracted dual-orbit InSAR deformation velocities distributed along the 1-1' engineering geological profile. * Xishancun_Optimized_Control_Points_11'.csv Contains the final optimized spatial coordinates (X_Ctrl, Z_Ctrl) of the Akima spline control points determining the inverted slip surface along the 1-1' profile. -----------------------------------------------------------------------------3. Source Code-----------------------------------------------------------------------------* main_inversion.py The core Python script executing the coupled geomechanical inversion framework. It drives the Particle Swarm Optimization (PSO) heuristic algorithm, iteratively updates the Akima spline control points, and interacts with the finite difference numerical modeling environment to minimize kinematic residuals. # Usage NotesThe script (“main_inversion.py”) is designed to be executed within the embedded Python environment of Itasca FLAC3D (Version 7.00 or higher). The “.dxf”geometry file can be directly imported into FLAC3D for mesh generation. # Data Sources & Acknowledgments- SAR imagery provided by the European Space Agency (ESA), accessed via ASF DAAC.- DEM data provided by NASA, accessed via USGS EarthExplorer.- Bajiaocun borehole logs and geological profiles provided by the Hunan Provincial Survey and Design Institute Co., Ltd.- Xishancun comparative dual-orbit InSAR datasets and profile configurations generously provided by Shen et al. (2025). =============================================================================