Debris flows: some physical characteristics and behaviour

摘要: Field observations on 449 debris flows in the Queen Charlotte Islands, British Columbia, are summarized. Movement of is classified according to seven characteristic types designated for purposes study. Data physical characteristics events presented. An analysis data made with reference event initiation, yield, and deposition using both mechanistic morphological criteria. For those which initiate an open slope, infinite slope model used establish a relationship between field drainage class angle, assumed frictional cohesive soil strength parameters. The classes directly related postulated location groundwater surface within depth rupture plane. Deposition channelized found be influenced by ratio channel width gradient, onset expected when exceeds unity. Five depositional area proposed. mag...