Earthquake and Local Rainfall Triggered Giant Landslides in the Unconsolidated Sediment Distribution Region along the Upper Yellow River - Remote Sense Analysis of Geological Disasters

摘要

All over the world, in mountains with huge altitude difference and intense rainfall, landslides and debris flows frequently take place and are the major geological hazards [1-5], such as in the surrounding areas of the Tibetan Plateau. The Upper Yellow River, that locates in the northern part of the Tibetan Plateau and consists of four basins areas (ie., Guide, Jianzha, Xunhua and Guanting) from Longyangxia Gorge to Shigouxia Gorge, is such a geological disaster-prone area (Figure 1). In the region, the altitude difference of many mountain slopes is larger than 1000 m. Landslides and debris and mud flows develop widely in the region. At least 450 landslides have been identified from remotely sensed images.