[Lei, Chaogui; Lei, CG] Univ Kiel, Inst Nat Resource Conservat, Dept Hydrol & Water Resources Management, Olshausenstr 75, D-24118 Kiel, Germany.
[Lei, Chaogui; Wang, Qiang; Xu, Youpeng] Nanjing Univ, Sch Geog & Ocean Sci, Nanjing 210023, Peoples R China.
[Wang, Yuefeng] Chongqing Normal Univ, Sch Geog & Tourism, Chongqing 401331, Peoples R China.
[Han, Longfei] Hunan Normal Univ, Coll Geog Sci, Changsha 410081, Peoples R China.
[Yuan, Jia] Fuyang Normal Univ, Sch Hist Culture & Tourism, Fuyang 236037, Peoples R China.