Study On The Adaptability Of The Residents To Debris Flow Disaster In Alpine Canyon Area Of Nu River

In recent years,with the increase of extreme precipitation events and the increase of disturbances caused by human activities to surface processes,debris flow disasters have shown an increasing trend.How to effectively adapt to sudden landslides is a realistic problem that needs to be solved in the economically backward mountainous areas.However,there is still little attention to this issue.The mountainous,poverty-stricken,ethnic,and border areas of the Nujiang Mountain Valley are one of the areas with the most serious debris flow disasters in China.Frequent disasters seriously threaten the safety of residents' lives and property,and restrict the rapid development of social economy.For a long time,how the residents of the Nujiang Valley can adapt to the debris flow disaster,how to adapt to the level,and how to better adapt to the debris flow disaster in the future is a scientific issue worthy of attention.Therefore,on the basis of clarifying the activities of mudslides and the contradictory relationship between man and land in the high mountain valley area of Nujiang,this paper selects typical residential areas,uses questionnaires and interviews with key informants,and uses the “perceived-adaptation” framework to analyze the debris flow of residents.The risk perception level of disasters,and the residents' adaptation behaviors and abilities to the debris flow disasters,and the key factors that restrict local residents from adapting to the debris flow disasters are revealed from different levels.The study has certain guiding significance for improving the disaster prevention and mitigation of debris flow in the high valley area of the Nujiang River.Through the study of the adaptability of the residents of the Gaojiang Valley in Nujiang River to the debris flow disaster,the following main conclusions are obtained:(1)Due to environmental and disaster coercion,the contradiction between man and land is prominent in the high mountain valleys of Nujiang.The settlements that are widely distributed on the debris flow fan and frequent mudslide disasters have caused many villages and towns to be located in the middle-high mudslide disaster risk range;(2)The overall level of disaster awareness and risk perception of residents in Nu River mountain valley area is consistent with the actual disaster threat.There is no significant difference in the relative risk perception intensity between villages and towns.Residents' perception of the risk of landslides is most closely related to their individual disaster experience and education level;(3)The adaptation behavior of residents in the Gaoshan Gorge area of Nujiang River to the debris flow disaster is divided into two levels: the residents themselves and the government guidance.The residents themselves include four aspects: the daily knowledge of disaster prevention and reduction,the disaster avoidance behavior,and the emergency response.Among them,knowledge about disaster prevention and reduction is mainly based on passive learning.Building locations away from high-risk areas is the most effective pre-disaster means of disaster avoidance.The government-guided group survey group defense is a more effective debris flow prevention measure in the high mountain valley area of Nujiang River;(4)The debris flow disasters in the high mountain valleys of Nujiang are widespread,and the residents' adaptability to mudslide disasters is relatively weak.They can only adapt to the debris flow disasters of small and medium scale.Currently,there are no effective measures to deal with large-scale debris flows;(5)Government actions such as prevention and control engineering measures,monitoring and early-warning technologies,and group survey prevention capacity building,as well as residents' own education level and economic level.The recognition of the characteristics of local mudslide activity is currently constraining the residents of the Nu river alpine canyon to the debris flow disaster.