1. School of Geography and Remote Sensing, Guangzhou University, Guangzhou 510006, China
2. Department of Land, Environment, Agriculture and Forestry (TESAF), University of Padova, Agripolis, Viale dell’Università 16, 35020 Legnaro, Italy
3. Rural Non-Point Source Pollution Comprehensive Management Technology Center of Guangdong Province, Guangzhou University, Guangzhou 510006, China
4. CAS Key Laboratory of Regional Climate and Environment for Temperate East Asia, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
5. Ministry of Education Key Laboratory for Earth System Modeling, Department of Earth System Science, Tsinghua University, Beijing 100084, China