Studies On Debris Flow Danger Degree Assessment And Control Measures System In Miyun County

Debris flow is a familiar natural disaster in mountainous areas.Because of their potential harm to human socio-economic systems,scholars have been concerned widespreadly at home and abroad.It is the hot spots study of mountain disaster prevention and reduction.Because the ecoenvironment and mountain ecosystems is weak in Miyun county,debris-flow occurred frequently and hazard condition is very serious.To safeguard safe of the life and property of the people and to purify water resources of Miyun reservoir,it is imperative to control debris-flow hazard.In accordance with special hills terrain and debris flow disasters in Miyun county,access to relevant literature and research results,select a typical debris flow groove,investigate the type of mud-rock flow,the formation of conditions,treatment status and human activities and so on.To depth analyze the characteristics of debris flow disaster,the mud-rock flow distribution,the activities of the characteristics and development trends were obtained.According to previous research results of the debris flow and groove survey results in Miyun County,the type of debris flow grooves were classified as liquid kind and dangerous degree,which based on previous study and occurrence and development properties of debris flow in Miyun county.In one part,which can reveal distribution characteristic of debris flow in this area,in other part,which can provided scientific basis for integrated control of different debris flow groove.Based on the view of system theory,analyzed the basic situation of debris flow disaster in Miyun county,this article uses Analytic Hierarchy Process to quantify relative factors from inner factors and external factors which affect debris flow danger degree,sets up a model of debris flow danger degree assessment in Miyun county.The model is applied to valuate the danger degree of the local debris gullies,the result has a high relativity to the fact.The study indicates that this kind of appraisal is feasible and veracious for the assessment of the debris flow danger degree.The future tasks should place the reliability research of study methods,thus for users provide the accurate evaluation result.According to the condition of debris flow happening,basic quality,activity rule,developing trend, damage degree,physiognomy,landform and the result of dangerous degree of debris flow,the integrated control system of debris flow,which include biological measures,engineering measure and management practice,was established.