摘要
A total of more than 50000 landslides has occurred in Sichuan province since the"5·12"Wenchuan earthquake,resulting in serious damage to the surface vegetation in southwestern China.In this study,we select Yingxiu,the epicenter of Wenchuan earthquake,as the experimental area.The vegetation coverage information of the experimental area is extracted from the remote sensing images collected in the year of 2005,2011 and 2013,respectively.The surface vegetation coverage in different periods is analyzed,and the vegetation recovery rate of the whole area is calculated.The experimental results show that in the first three years after the earthquake,the speed of vegetation restoration is slow,and the vegetation coverage rate is less than 20%better than 0.241,while in 2013,the vegetation coverage increases significantly.
基金
supported by the NationalKey R&D Program of China(2019YFC1510700)
the National Natural Science Foundation of China(41602355,41701499)
the Sichuan Science and Technology Program(2018GZ0265)
Chengdu University of Technology Backbone Teacher Program(2019SJ01-04230)
Special earthquake science and technology project of Sichuan Seismological Bureau(LY1814)。
