ABSTRACT
Majority Debris flows usually happen after the occurrence along stem from the landside by the rainfall. They are results of the area of the landslides advanced to valley. The debris flows have the characteristics of sudden eruption, intermittent and enormous energy. Because of the destructive power, the debris flow may cause heavy casualties and serious economic losses. Therefore, the prediction of disaster area and motion trajectory has already become one of the most important the risk assessment. Geographic information system and digital model has become a practical and effective means in analyzing geologic hazard. These two techniques have strong treatment ability of spatial data and the attribute data, and can also be efficiently solved in data collecting, data processing, and data analysis about landslide and debris flow. By the method of the interaction between sensitivity factor of spatial distribution and digital model to assess to the hazard of the debris flow gully become hot spot.
