Land Use Transition In The Process Of Urbanization In Karst Area Based On The Ecological Perspective

Land use transition is a hotspot and cutting-edge of current land use change research.With the rapid development of China's economy,city of the city population increasing,the contradiction between economic development and ecological environment is becoming more and more prominent,carry out the typical land use transition and its environmental effects is the understanding of city modernization,one of the important ways of the spatial and temporal variations of ecological land use change.Based on the ecological perspective,this paper uses RS and GIS technology,statistical analysis theory and tools to analyze the spatial characteristics,driving force and ecological environment quality of land use transformation in Huaxi district in the process of urbanization in Karst Area.Finally,the paper analyzes the problems of land use transformation and puts forward some suggestions to solve the problems,so as to provide reference for regional economy and ecological civilization construction.The main methods and conclusions of this study are as follows:(1)In the aspect of image interpretation,the high resolution image of the study area in the three periods of the study area is solved by using the technology of object classification based on the combination of the image with a resolution of 1.07 meters.The results show that the accuracy of object-oriented classification is 86.05% in 2010,86.31% in 2013,and 85.69% in 2016,the interpretation accuracy reaches the ideal level.Modify the classification of the wrong patch and not classified the patch,the final classification accuracy than the primary accuracy will be improved.Compared with the traditional method,this method can improve the efficiency of image interpretation and shorten the translation time.(2)In the process of some repetitive data processing,the ArcGIS Model Builder is used to construct the process model of visualization,automation,and modeling.The results show that the application of arcgis Model Builder model builder simplifies the large and repetitive data processing in traditional land use transition research,saving time,and reducing error rate and improving efficiency.(3)In the evaluation of land use spatial characteristics and ecological environment effect evaluation,this study introduces the KernelDensity analysis method,which can express the position,hot and cold intensity and distribution of land use transition area intuitively and beautifully,and Ecological environment quality changes in the location,hot and cold intensity and distribution,in order to provide the basis for public decision-making.(4)On the analysis of the transformation of land use spatial distribution characteristics and found that:The transformation between ecological land and ecological land into non ecological land these two types are the main type of transformation.The scope of the transition between ecological land is expanding.2013 to 2016 compared to 2010 to 2013 the land use transformation of the heat reduction,and the transition area from the concentration becomes dispersed.(5)In the study of the driving force of land use transformation,the distribution of natural driving factors has a fundamental effect on the spatial distribution of land use transformation in Huaxi District.The human driving factors determine the scale,structure,Layout and direction.(6)After evaluating the ecological environment effect of the study area,the results show that the ecological quality of the ecological environment effect caused by the land use transition is declining,and the decline is from 2013 to 2016,which is greatly reduced from 2010 to 2013,The conversion of cultivated land,grassland and forest land to non-ecological land in ecological land is the most important type of land that leads to the decline of ecological quality.Although the forest land to other land area is not the largest,but the resulting contribution to the largest proportion of ecological degradation,indicating that the woodland in the entire ecosystem,to maintain the quality of ecological environment plays a vital role;cultivated land transition area of the largest In the process of urbanization,and the cultivated land is occupied most.(7)The difference of ecological environment effect caused by land use transformation is the result of the combination of distance factor,topography factor,structure of transition type and resource endowment.In the process of urban planning and ecological management,we must fully consider these factors,so as to achieve reasonable planning and governance.(8)The main land use problems in Huaxi district are as follows: farmland and forest land are occupied in the process of urbanization;there is a waste of land resources;there are some confusion in the order of land use.