Chains Genesis Analysis and Prevention Measures of Potential Hazards in Longwu Dongshan Gully of Qinghai Province
Longwu dongshan is located on the east side of the Longwu River in Tongren County,Qinghai Province.It belongs to an erosion and erosion low mountain and hilly area with serious soil erosion.The mountains in the gully area are steep,and the rock and soil structure is loose,making it prone to landslides,debris flow,and other geological disasters.It exhibits obvious potential chain effects in the process of formation and evolution.If it experiences continuous rainfall or heavy rain,large-scale chain disasters can occur,posing a serious threat to the regional ecological environment and the safety of downstream residents.The distribution characteristics of geological hazards in Longwu Dongshan were investigated through detailed field surveys,remote sensing image interpretation,and analysis of meteorological and hydrological data.the potential chain effects of hazards and their prevention and control measures were studied.The results show as follows.The potential geological hazard chain in the gully area of Longwu dongshan is a typical rainfall-induced geological hazard chain,which can be summarized as two main potential chain structures:gully source landslides and debris flow,and runoff erosion,debris flow,channel erosion,slope collapse,and dam breach type debris flow.From the perspective of causes,the mutual triggering and transformation relationships between predicted chain disasters are analyzed,revealing the process and conditions for the formation of potential hazard chains,the first chain is divided into three stages:incubation initiation,evolutionary outbreak,and scale expansion;the second chain is divided into four stages:material source initiation,hydraulic erosion,channel blockage and disaster amplification.In response to the evolutionary mechanism and development trends of potential hazard chains,a comprehensive prevention and control plan including"monitoring and tracking""soil and water management""interception and stoppage"and"surface vegetation stabilization"was proposed,aiming to achieve disaster prevention,reduction,and protection of the ecological environment.
Longwu Dongshangeological hazardsrainfallpotential disaster chainprevention and control countermeasures
万方数据
维普
