Link Between the Landslides and the Generated Seismic Signals: Dynamic Inversion and Numerical Simulation

The high-speed landslide may result in varying degrees of damage to downstream, such as dammed lake and subsequent dam failure and outburst flood. Nowadays, the seismic station is able to records the seismic signals of the entire process of landslide, provides valuable data for understanding the landslide process. Meanwhile, numerical simulation can also simulate the entire landslide process. However, it is seriously affected by variability of input parameters. To tackle the scientific challenge, we comprehensively analyzed the 2018 Baige landslide by firstly performing a joint time-frequency domain transform of the seismic signal using short-time fourier transform. We then reconstruct the land slide force history using empirical Green’s function. We used the constructed landslide force history inversion to calibrate the numerical input parameters using Discrete Element Method. Finally, we use the calibrated parameters to construct the whole process of landslide numerically. This study provides a potential way that improves the rationality and reliability of the landslide reconstruction using multi-method joint analysis.