Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China;
Graduate University of Chinese Academy of Sciences Beijing 100049 China;
Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China;
Center for Chinese Agricultural Policy Chinese Academy of Sciences Beijing 100101 China;
State Key Laboratory of Water Environment Simulation School of Environment Beijing Normal University Beijing 100875 China;
Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China;