LIU Quan1,2,LI Zhan-bin1,3,LI Peng3,LI Jing3,PENG Yuan-yuan3,ZHANG Xiang3(1.Institute of Water and Soil Conservation,Chinese Academy of Sciences and Ministry of Water Resources,Yangling,Shaanxi 712100,2.Mianyang Normal University,Mianyang 621000,3.Xi'an University of Technology,Xi'an 710048)
S157.1