Study On Land Comprehensive Carrying Capacity Based On Improved AHP And Entropy Method

Land is a non-renewable resources,its carrying capacity is limited which in a certain time and space.In recent years,with the economic development,frequently occurring around the construction land is increasing,agricultural land is plummeting,shortage of resources,environmental degradation,land carrying capacity is declining and so on.Chaohu Lake Basin is the core area of economic development in Anhui Province.Therefore,it is of great significance to study the comprehensive carrying capacity of land in Chaohu Lake Basin and analyze its bearing status,and provide theoretical basis for the optimization of land resources.This thesis focuses on the status of natural resources and the current situation of land use in Chaohu Lake Basin,analyzes the existing problems of land use in Chaohu Lake Basin,studing the land comprehensive carrying capacity of Chaohu Lake Basin combines the main factors.The work is as follows:(1)To construct the evaluation index system of comprehensive land carrying capacity of Chaohu Lake Basin.Based on the connotation of the comprehensive carrying capacity of land,combined with the social status and economic development level of Chaohu Lake Basin,this paper constructs the evaluation index system of comprehensive load carrying capacity of Chaohu Lake Basin in four dimensions: population,economy,ecological capacity and social construction.(2)Calculate the bearing index of land comprehensive carrying capacity in Chaohu Lake Basin.The weight of the evaluation index is calculated by the "5/5 / 1-9 scale" analytic hierarchy process and the entropy weight method.The distance function method and the minimum relative information entropy principle are used to determine the comprehensive weight of the evaluation index.Finally,use the multi-objective comprehensive evaluation model analyzes the land comprehensive carrying capacity and bearing capacity of four subsystems in Chaohu Lake Basin in 2104 years by index addition model.(3)Comparing the comprehensive carrying capacity of land and the bearing status of four subsystems in Chaohu Lake Basin.The results of the single entropy method,the "5/5 / 1-9 scale" analytic hierarchy process,the arithmetic mean method and the load index calculated by the comprehensive method show that the results obtained by the comprehensive method are closer to the expert review result.With the help of SPSS22.0 software,the clustering analysis method was used to classify the four subsystems of the Chaohu Lake Basin in 2014.It was divided into three grades.ArcGIS mapping tools were used to draw the comprehensive bearing capacity of the Chaohu Lake Basin and the four subsystems and the spatial difference of the comprehensive carrying capacity of Chaohu Lake basin is analyzed by using GIS spatial visualization technology,and its restrictive factors are clarified.(4)Design and development of "Chaohu Lake Basin multi-planning superimposed land use strategy analysis system".The results show that the overall level of land comprehensive bearing capacity in Chaohu Lake Basin is in the middle and low level,and the comprehensive bearing capacity of Hefei urban area is higher than that of other areas in the watershed,and the comprehensive carrying capacity of Lujiang and Wuwei counties is slightly lower.The bearing capacity of the comprehensive bearing capacity of Chaohu Lake is the highest in the Baohe area,and its value is 0.5280,which is ahead of other areas in the basin.The lowest value of the bearing index is Wuwei County,its value is 0.3687;the social construction subsystem’s contribution of the comprehensive capacity of land is the largest,followed by the population subsystem and the ecological capacity subsystem,the economic subsystem has the lowest contribution.The result shows that the social construction of Chaohu Lake Basin is developing rapidly,but the economic development is slow.