Analysis and assessment of earthquake-induced secondary mountain disaster chains based on multi-platform remote sensing

摘要

The Wenchuan earthquake was a destructive earthquake that measured at 7.9 Mw occurred at 14:28:01.42 CST on May 12, 2008 in Sichuan province of China, which induced large quantities of secondary mountain disasters such as collapse, landslides, debris flows and barrier lakes. These disasters occurred and more seriously formed disaster chains causing great destruction, and costing many lives after both the earthquake and thousands of aftershocks. To gather a proper understanding of disaster and formed chains, it is necessary to consider disaster chains for the dilapidated areas. In this paper, we focused on dynamically monitoring and analyzing the disaster chains patterns, spatial distribution and trying to choose the best time to cut the chains for preventing the prospective disasters. The multi-sensor remote sensing imageries before and after earthquakes were used to discover the disasters induced by earthquake and aftershocks, then to acquire the distributions of these disasters and rapidly analysis and assess the disaster chains to prevent possible disaster consequences.