Inst.of Forestry Research, Chinese Academy of Forestry Science, Beijing 100091, China;
College of Resource & Environment, Beijing Forestry University, Beijing 100083, China;
College of Resource & Environment, Beijing Forestry University, Beijing 100083, China;
Inst.of Forestry Research, Chinese Academy of Forestry Science, Beijing 100091, China;
College of Resource & Environment, Beijing Forestry University, Beijing 100083, China;
debris flows; disaster early-warning technique; torrent classification; mapping of the hazard zones; the neural networks technique;