1. College of Environmental Sciences and Engineering
2. The Key Laboratory of Water and Sediment Sciences, Ministry of Education
3. Peking University
4. Beijing 100871
5. China
6. Department of Plant, Soil and Microbial Sciences
7. Environmental Science, and Policy Program
8. Michigan State University
9. East Lansing
10. USA
11. State Key Laboratory of Eco-hydraulic in Northwest Arid Region of China
12. Xi'an University of Technology
13. Xi'an 710048