Risk Assessment Of Sandstorm And Landscape Pattern Optimization

Wind erosion is one of the most serious ecological problems and is paid widely attention in the whole world.In recent years,sandstorms in Beijing weather often occur,the sandstorm has brought critical mischief and threatens to environment,natural resources,and people's daily life.At the same time Beijing as the capital also to create a bad impact on the international community,so the wind and sand control in Beijing it is very important work.A case study was carried out in Daxing District,which is located in the southern suburb of Beijing.Use RS and GIS for technical support,from different regions and different times of the study area for wind disaster risk assessment,get Daxing district the sand of the dangerous level of administrative units,combination the theory of landscape pattern achieve optimization of landscape pattern with the study area.The main contents of this article include:first,collect the study area images,image data processing and analysis;quantify the properties of surface data.and then take them into the matter-element model,thus the risk of different levels.Use the matter-element model is want to introduction matter-element analysis principle into Sandstorm diffusion research, establishment evaluation index system,classification define index respectively,use each index correlation function calculate each index dangerous level correlative,then ues the model calculate all index dangerous level correlative,expressed evaluation results quantitative.And for the same area,separately evaluate the risk level in different periods, found that surface level changes and changes in the relationship between the quantitative, explore the optimization of landscape pattern.