| Land is the carrier for human beings to engage in all activities.In order to maximize the efficiency of land use,human beings usually use the natural and economic characteristics of the regional land for functional zoning of land use,so as to realize the rational utilization and scientific management of land resources.In recent years,with the increase of population,the rapid advance of new urbanization,industrialization,development and construction of large-scale land and sustained,brings great pressure to the development and utilization of land resources and environmental protection,the contradiction between people and land is prominent gradually,and become more and more fierce.Therefore,the research and development of ecological space,picturesque scenery meet intensive production space efficient,livable modest living space "Sansheng" zoning is particularly important.Firstly,according to the land use dominant function classification thoughts,using GIS spatial analysis technology,the research area is divided into the ecological function of land,living land and land production functions,analyzes the current situation and existing problems of land use.Then,the spatial structure,layout,characteristics and causes of land use are studied.On the diversity index,concentration index,evenness index,landscape index was calculated by cluster analysis on the landscape index by using SPSS technology,using GIS technology to draw the land use spatial distribution map.Secondly,using single dynamic degree,relative change rate and entropy index of land use structure,the change of land use function in the whole county in the past 2012-2014 years was calculated.From this,summarizes the county land use spatial structure layout characteristic and the change range.Finally,from the three aspects of ecological function,production function,living function,establish 13 evaluation indexes,using AHP to calculate the weight of the weighted sum calculation index score,the ecological function evaluation value,production function evaluation value,life function evaluation value,according to the township "Sansheng"function,using 3D the county is divided into land cube method of ecological function area,production area,living area in 3 regions,and on this basis,puts forward relevant policy suggestions.Through the research,draw the following conclusions:(1)the combination type of southwest to the ecological function of forest land,to the north of the agricultural production function of land and water ecological function of land in the middle of the land landscape matrix for the woodland and farmland.(2)the "Sansheng" with diverse characteristics,showing the whole feature of south central high,low side;land use low concentration degree,most of the township is in high and low concentration of land use,generally showing the north and south sides of high,middle low spatial distribution characteristics of land use and uniformity;the advantages are relatively low degree of land use.(3)over the past 2012-2014 years,the land production,functional land and urban life function land change in the county are relatively large,and the relative change rate of land use in different towns is obvious,and the overall change tends to disorder.(4)the overall functional level of the county's land use is low,and the differences between the townships are large.According to the functional values of the three towns,they are divided into 3 major areas:ecological functional areas,production functional areas and living functional areas. |
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