Abstract:
The Wenchuan-Songpan section of National Highway 213 is located in a mountainous area with strong earthquakes, where the landslide disasters occurred frequently. The traffic in this area is interrupted every year due to landslide disasters, so it is urgent to identify the space distribution of landslide hazards along the line and evaluate the susceptibility. A total of 288 landslide hazards were identified by the optical remote sensing and InSAR integrated remote sensing technology, of which 27 deformation landslide hazards were detected by InSAR. The identified landslide hazards were set as evaluation samples, and 9 influences including elevation, slope, slope aspect, surface curvature, engineering geological rock group, normalized vegetation index (NDVI), distance from road, distance from river, and distance from fault were selected. Besides, the logistic regression model is used to evaluate the susceptibility of landslide hazards in highway corridors. The evaluation results can provide a reference for the prevention and control of landslide disasters in the Wenchuan-Songpan section of National Highway 213.