Quantitative Evaluation Model Of Geographical Environment And Its Application In Evaluation Of Relocation Of Mining Area Villages

Geographical environmental assessment is an indispensable part of regional planning and urban and rural construction.There are many geographical environmental impact factors and complex relationships.At present,domestic and international research on this field is still insufficient.Based on the in-depth analysis of the main influencing factors of the geographical environment,this paper focuses on the construction of the quantitative evaluation model of the geographical environment and the technical method for determining the weight of the evaluation factors.The geographical suitability evaluation of the relocation of a village in a coal mine area on the Loess Plateau is taken as an example,based on the ArcGIS platform.A variety of evaluation models were used to quantitatively evaluate the geographical environment of the study area and analyze its applicability.The main research contents and results of the thesis are as follows:(1)Explain the basic principles of geographical environment assessment factor selection,and analyze various natural geographical factors: water system,topography,geological structure,vegetation,etc.;socio-economic factors: residential land,road network,mineral resources,tourism resources,etc.;special evaluation factors : The influence of many factors such as human body field,microwave,earth rotation,ground radiation,El Ni?o phenomenon,life weather,soil and water,and radon on the geographical environment,and discuss the technical approach to the acquisition of geo-environmental evaluation factors.(2)Explain the principles,methods and technical processes of the evaluation system construction,determine the criteria for the hierarchical classification of the geographical environment comprehensive evaluation system,select the geographical environment evaluation factor based on the DPSIR indicator model,and determine the weight of the evaluation factor by using the illegal combination of the analytic hierarchy process.And write the weight calculation program on the MATLAB platform.(3)Taking the evaluation of the relocation of a village in a coal mining area of the Loess Plateau as an example,according to the geographical environment of the loess mining area and the characteristics of coal mining subsidence,select the natural geographicalindicators such as slope,aspect,surface water and groundwater source in the loess gully area,and the traffic convenience.The socio-economic indicators such as the farming radius are the main influencing factors.The weights of the above factors are illegally determined by using Tiel.Based on the Analytic Hierarchy Process(AHP)and ArcGIS software platform,the quantitative evaluation model for the geographical suitability of the relocation of villages in coal mining subsidence areas is constructed.And superimposed and analyzed according to the corresponding index weights of the evaluation model,and obtained the comprehensive evaluation distribution map of the geographical suitability of the mining area to determine the best optional area for the relocation of the village.(4)Using the fuzzy comprehensive evaluation method,the ideal point method,and the unascertained measure theory method to quantitatively evaluate the geographical environment of the study area,and compare and analyze the applicability of various evaluation models,and it is the village of the subsidence area of the coal mine in the Loess Plateau.Provide theoretical models and technical methods for quantitative evaluation and scientific decision-making of relocation sites.