Study On The Characteristics And Control Measures Of The Flood And Debris Flow In The Shanmenhe

The debris flow disaster has the characteristics of sudden occurrence,wide range of harm and great potential danger.According to the data,large and super-large debris flow disasters have occurred in the history of the Shanmenhe,and the modern debris flow is also very active,which poses a great threat to the life and property safety of the people in the river basin,and therefore,the research on the development characteristics and the treatment measures of the mountain torrent disaster is carried out,It is of great practical significance to reduce the hazard of the mountain and flood debris flow and to promote the local economic and social development and maintain the social stability.First,through the collection of data and field investigation,the natural geography and environmental geological background of Shanmenhe are found out,which provides the basic data for the study of the development characteristics and control measures of mountain flood and debris flow disasters.Secondly,by using the research method of field experiment and indoor comprehensive analysis,the formation conditions of flood and debris flow in Shanmenhe are studied.It is found that there are many tributaries,the longitudinal ratio of gullies is large,and the accumulation of solid materials in the gullies is more.It is considered that the Shanmenhe is prone to debris flow disasters when it encounters suitable rainfall conditions.Thirdly,the flow characteristics of the debris flow in the Shanmenhe are analyzed.The results show that the debris flow of the mountain gate belongs to the gully type,the heavy rain,the low viscosity,the large scale,the moderate and dangerous water stone(sand)type debris flow.In this paper,the risk assessment method of the single-ditch debris flow is used to quantitatively evaluate the risk of three branches in the Shanmenhe,and it is concluded that the left channel,the middle ditch and the right ditch are of moderate risk.Finally,on the basis of risk assessment,according to the disaster characteristics of flood and debris flow in Shanmenhe and the existing control schemes,a variety of prevention and control engineering schemes are put forward to carry out the engineering control design.