The Charactics And The Studies Of Monitoring Early Warningon Debris Flow In Mentougou District In Beijing Area

The debris flow disaster is the geological disaster that causes the most casualties in the Beijing area,and the mudflow disaster in the Mentugou District is particularly serious.Since the founding of the People's Republic of China,more than 100 people have died,causing direct damage to farmland and residential areas and causing major economic losses.Over the years,the Beijing government and scholars in various countries have paid great attention to the disaster prevention work and early warning research of debris flow.This paper takes Mentougou district of Beijing as the research area,combines the historical data,through the early investigation and study,summarizes the development characteristics and formation conditions of the mudslide in mentougou district,builds up and completes the monitoring and early warning system of mudslide in mentougou district,and realizes the function of early warning and prediction of disasters.The construction of debris flow risk zone evaluation and monitoring early warning system in mentougou area is the key point of this paper.After selecting the evaluation factors needed and using the method of quantitative analysis,the evaluation results are obtained,and the area of vulnerable area is delimited according to the classification criteria,and the trend of debris flow is predicted.The data before and after debris flow are obtained by field monitoring instrument in real time,and the threshold of early warning is determined based on the analysis of the research results.The rainfall and water content monitor the triggering factors of debris flow and the saturated state of the soil;The infrasound monitoring is used to capture infrasound signals after debris flow formation and realize early warning.The mud level meter monitors the depth of the mudslide flow in the cross section to infer the scale of the mudslide.The debris flow monitoring and early warning system is the technical support of this paper,and the intelligent platform of debris flow early warning is built.The construction of this system is based on the structure of the Internet of Things technology,which is divided into data perception layer,network transmission layer,intelligent analysis layer,and application layer,so as to realize the application of the Internet of Things technology in the monitoring and warning of sudden Geological disasters.The system lays a good foundation for debris flow monitoring and early warning,and improves the automatic monitoring level of debris flow disaster in Beijing.