Application to GF-2 Satellite for Road Landslides Monitoring

Global warming has profoundly changed extreme weather events，and remote sensing technology is gradually being applied to the monitoring of ecological and environmental disasters.China is one of the countries with most serious natural disasters in the world.With the development of human society and the improvement of people’s awareness of disaster risk，geological disaster monitoring and risk management has attracted more and more attention.Taking the Adjacent Area of Changsha \| Xiangtan(CXAA)，which is the main part of Xiangtan jiuhua economic development zone，as the research area，the road slope and the ecological environment in the area were monitored by using the fusion image of high spatial resolution remote sensing of GF\|2 made in China on March 27，2016.Taking normalized difference vegetation index(NDVI)，terrain slope index，soil index and other parameters as inputs，the comprehensive evaluation of ecological environment in CXAA was obtained by simulating the comprehensive factors of ecological environment with the comprehensive index method.We found that the ecological environment of 78.75 % of the study area was good，which indicated that the natural ecological environment on both sides of the road and the surrounding areas was basically not damaged.The road surface，water area(such as Xiangjiang river)，construction land(such as Xiangtan high\|speed railway north station) and industrial areas(such as Geely automobile，Tidfore enterprise group，etc.) and other regions of the ecological environment comprehensive index is poor，on both sides of the road in some slope sections still exist the potential risk of landslide.Therefore，we suggest that during the rainy season，there is a need for more time\|phase high spatial resolution of GF-2 remote sensing satellite and other domestic GF satellite continuous monitoring，in order to more fully understand the risk of road slope landslide and provide early warning.