1The State Key Laboratory of Remote Sensing Science, School of Geography, Beijing Normal University, Beijing 100875, China, E-mail: Hong.Wei@bnu.edu.cn
2State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing 100875, China, E-mail: Hong.Wei@bnu.edu.cn
3Academy of Disaster Reduction and Emergency Management, Ministry of Civil Affairs and Ministry of Education, Beijing 100875, China, E-mail: Hong.Wei@bnu.edu.cn
*Corresponding Author:
Xiang Zhao, State Key Laboratory of Remote Sensing Science, School of Geography, Beijing Normal University, Beijing 100875, China, Tel: +86-10-58800512 Email: