Study On The Influence Factors Of Landslide In Yunnan Area Based On Landslide Database

Geological disasters are one of the main natural disasters,and landslides are the most frequent geological disasters.Because of the widespread distribution of landslides,the high frequency and uncertainty of the landslide seriously affect the people's life and property safety.There are many factors affecting the development of landslides,in which the complex geological environment,frequent human activities,dense rainfall and severe earthquake are the main factors.The unique hydrometeorology,terrain,geomorphology and geological and lithologic factors in Yunnan make the landslides occurring very frequently.Landslides have killed tens of thousands of people and lost hundreds of billions of dollars in property since twentieth Century alone.Therefore,studying the related factors of landslide in Yunnan can provide important guarantee for people's life and property safety,and also meet the great demand of social and economic development.Scholars at home and abroad have been studying landslides in Yunnan for a long time,and there are a large number of research data in the typical landslides in various cities of Yunnan.This paper has collected the data of landslide disaster in Yunnan area,and developed the landslide database by using the existing database software.By comparing the advantages and disadvantages of the four commonly used database software,this paper selects a more suitable ACCESS software to carry out the development platform of the database.In this paper,the framework and steps of database development are described in detail,and the operation forms involved are designed to facilitate the user to use.Based on the actual landslide disaster data,the author establishes a basic database table,and designs a user friendly form based on it,which enables the system to perform data maintenance,search and query,help,user management and data report forms.Through the major websites,related books and excellent papers,321 typical landslide data in Yunnan area were collected,and the landslide data were recorded in the landslide database.The landslide data collected in Yunnan area are statistically analyzed according to landslide and elevation,landslide and slope aspect,landslide and slope,landslides and lithology,landslides and rainfall,landslides and earthquakes,and their relationship with landslide development is analyzed.The landslide data of Yunnan area in the landslide database will be included,and202 landslides,which are complete and typical of the geological data,are selected.The main controlling factors affecting the development of landslides,such as slope,height difference,lithology,etc.,are counted,such as rainfall,earthquake and artificial disturbance.By using the correlation analysis method in the grey system theory,the statistics data are processed,and the correlation degree between the landslides and the various influencing factors is obtained.Based on these factors,a variety of factors that affect the development of the landslide are evaluated and analyzed.