[1] Sichua n Univ, State Key Lab Hydraul & Mt River Engn, Chengdu 610065, Sichuan, Peoples R China
[2] Sichuan Univ, Coll Hydraul & Hydroelect, Engn, Chengdu 610065, Sichuan, Peoples R China
[3] Sichuan Prov Stn, Surveying & Mapping Prod Qual Supervis & Inspect, Chengdu 610041, Sichuan, Peoples R China