Xi Chen is currently an assistant research fellow in Aerospace Information Research Institute, Chinese Academy of Science, Beijing, China. He received the Ph.D. degree in Faculty of Geographical Science, from Beijing Normal University, Beijing, China, and then worked as a postdoc researcher in Institute of Remote Sensing and GIS, School of Earth and Space Sciences, Peking University. His research interests focus on intelligent algorithms and applications of surface water remote sensing, including intelligent extraction, change detection and fusion methods of multi-source remote sensing of surface and subsurface water, as well as data validation of related remote sensing products.