[1] Hohai Univ, Coll Hydrol & Water Resources, State Key Lab Hydrol Water Resources & Hydraul En, Nanjing 210098, Jiangsu, Peoples R China
[2] Iowa State Univ, Dept Agron, Ames, IA 50011 USA
[3] Nanjing Hydraul Res Inst, Nanjing 210029, Jiangsu, Peoples R China
[4] Inst Water Resources & Hydropower Res, Dept Water Resources, Beijing 100044, Peoples R China