[1] CAGS, Inst Karst Geol, Key Lab Karst Dynam, MNR, Guilin 541004, Guangxi, Peoples R China
[2] UNESCO, GZAR, Int Res Ctr Karst Auspices, Guilin 541004, Guangxi, Peoples R China
[3] Natl Observat & Res Stn, Karst Ecosyst, Pingguo 531406, Guangxi, Peoples R China
[4] Guangxi Karst Resources & Environm Res Ctr Engn Te, Guilin 541004, Guangxi, Peoples R China
[5] China Geol Survey, Changsha Nat Resources Comprehens Survey Ctr, Changsha 410000, Peoples R China
[6] China Univ Geosci Beijing, Sch Water Resources & Environm, Beijing 100083, Peoples R China