Shengnan Yu, China University of Geosciences, Wuhan, China; Yong Deng, Changjiang Institute of Survey, Planning, Design and Research, Wuhan, China; Yunfei Li, Sun Yat-sen University, China; Jun Li, Jia Chen, China University of Geosciences, Wuhan, China; Shaoquan Zhang, Jiangxi Province Key Laboratory of Water Information Cooperative Sensing and Intelligent Processing, Nanchang Institute of Technology, China