The Study On The Characteristics And The Risk Assessment Of Debris Flow In Shenjia Gully Of Luding County Of Sichuan

The debris flow is a very serious geologic hazard which explodes suddenly . The Luding county town plays a crucial role in the economic development, which is the center of the politics , economy and culture of the whole county . As the development of people's societal and economic activity , people excessive exploit natural resources and the environment was destroyed continuously . These cause the debris flow become more serious . A catastrophic debris flow occurred in Shenjia gully of Luding city area on July 14 , 2006.This debris flow caused serious loss of property . Therefore the study , evaluation , forecast and mitigation management of the debirs flow must be strengthened . Only by this way the occurrence of the disaster can be prevented and the damage of the disaster can be reduced . It has important significance for the country's development.In the full text , are there six parts of the introduction , the development environment of the debris flow , the debris flow development character, the moving and dynamical characteristic of the debris flow, the risk assessment of the debris flow and the study on the risk management . It tells particularly the debris flow's the encironment and the development characteristic by numbers . And according to its character , selecting the latest research results at present , the anthor calculates the debris flow's the moving , dynamical characteristics and the scale , such as , the velocity of flow , the wallop , the peak value flux , and the total flux . And the anthor calculates density in different design frequency by the empirical formula method . In the text, the author uses the modle of evaluating a single gully to evaluate the risk of the debris flow . First , the author calculates the hazard degree in different design frequency , and forecasts the risk range of debris flow in Shenjia gully based on the maximum pile thickness and the total solid amount of a denbris flow . Then , on the basis of the risk range in different design frequency , the author carries out the damageability and risk assessment . The basic purpose of risk management is reducing risk or transferring risk , reducing the loss of life and property . The text constructs the system of risk management of debris flow in Shenjia gully , basis on the condition of Shenjia gully .