Impacts of land use and cover change on soil quality in urbanization--A case study of zhengzhou,Chin

来源 :第四届城市、工业、交通和矿山土壤国际会议(The 4th International Conference on Sol | 被引量 : 0次 | 上传用户:guanzheng52824
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  The paper studied the change of land use and its impact on soil quality and then predicted the change of land use and cover in structure and space.Based on the study above this paper predicted the impact on soil quality in Zhengzhou suburb.The results are as follows:Studied the change of land use/cover and the expand the characteristic of urbanization in Zhengzhou based on the remote sensing technology.Analyzed the change of land use between 1988 and 2002 by the GIS space analysis and the RS image.In the quantity structure,through the land use data of 1988 and 2002,carried on the spatial analysis in GIS,the land use transition matrix has been obtained.In the space,it analyzed the change of land use particularly in the district where change occurs and also analyzed the relations of the distance of road and city center.Moreover,by analyzing the city expanding index from 1988 to 2002,the Zhengzhou city expanded most in the south (S),,northeast (EN)north (N),southeast (ES),the expanding index is 0.52、0.493、0.492、0.459.It studied the relations between change of soil quality and the change of land use/cover and predicted the soil quality changing.Firstly,it carried out the spatial superimposition analysis on the soil quality map of two time points and analyzed the characteristic of the soil fertility change.And then it analyzed the change of soil pollution index in four monitoring points.Meanwhile,it also take the spatial superimposition analysis on the map of soil quality change and land use,and studied the relation of them.It mainly analyzed the relation between the single factor soil fertility variation and the change of land use and the relation between change of comprehensive fertility and land use.It analyzed the drive force to change of land use/cover in multi-level.On macroscopic,the change of land use is forced by policy,economical development,urban development guidance.Center in view,mainly using the quota statistical analysis method,it analyzed that factor driving force as GDP,inhabitant expense.On microscopic,based on the unit cell,using the GIS space analysis technology,it studied the driving force to the change of land use microscopic.It predicted the land use structure and spatial distribution.In the quantity,by using the Markov model it predicted the multi-plans of land use structure in future.It also determined the different development pattern by the contrast analysis.In the spatial distribution,through the land suitableness evaluation,using the CA model union social economy limiting factor,it predicted based on the different pattern.Based on the prediction of land use,this paper predicted the change of soil function,the soil pollution,and soil fertilization and soil class.Both the Shannon index and Pielou index reduced while the Gleason index increased.
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