Research On The Central City Zone’s Growth Boundary Of Jingchan City

Urbanization,as an important issue in urban development and construction,provides a powerful impetus for economic and social development.It also raises a series of problems,such as the continuous spread of urban space and the confusion of urban spatial structure.At present,the rapid urbanization process has led to the rapid expansion of urban construction land,resulting in arable land has been invaded,various types of ecological land area is decreasing,environmental pollution and other results.How to protect the city’s survival and development of space,but not too much occupation of arable land and ecological land to ensure food security and urban ecological structure,scientific and rational use of urban land resources to ensure the coordinated development of urban health,has been more and more of the scholars attention.The delimitation of urban space growth boundary can effectively control and prevent the disorderly expansion of the city,protect the ecological pattern and make the city healthy development.The forecast of urban spatial growth,especially the expansion of urban construction land expansion,so as to scientifically and rationally delineate the future growth boundary of the city,will provide decision support for future urban planning and land use planning.Based on the ENVI software platform,this paper takes the urban area of Jinchan City as the research area and obtains the remote sensing images in 1987,1999,2014 and 2014,and analyzes the urban spatial expansion in the study area from 1987 to 2014,To promote the impact of its expansion and change factors.On the basis of this,the spatial pattern and development trend of land use change in the study area 2022 and 2030 were simulated based on the CA-Markov model and the urban master plan.The main conclusions are as follows:(1)From the expansion of the number of view,the urban planning area of the land type showing a "two by four minus" the law of change: that is,construction land,forest land area is increasing,while the arable land,unused land,grassland and water area is decreasing.The law,which to increase the construction and expansion of the most significant.(2)From the perspective of expansion,the difference is that the period shows a different direction of expansion,but overall,the central city is mainly to the direction of the expansion of the northeast direction of the airport,as well as Long Shou New District,Jinshui New District,the focus of these new developments Functional area outward extension extension,the central city construction land eastward and northward expansion of the obvious.(4)This paper chooses the constraint factors and influencing factors,makes use of MCE criteria to judge and formulate the conversion rules,and evaluates the construction land suitability.On this basis,the spatial pattern of land cover types in Jinchan city is simulated in 2020,Based on the combination of forward thinking and reverse thinking,GIS overlay technology is used to define the urban expansion boundary of Jinchan city center in 2020.It is compared with the overall planning.This paper chooses the constraint factors and influencing factors,makes use of MCE criteria to judge and formulate the conversion rules,and evaluates the construction land suitability.On this basis,the spatial pattern of land cover types in Jinchan city is simulated in 2020,Based on the combination of forward thinking and reverse thinking,GIS overlay technology is used to define the urban expansion boundary of Jinchan city center in 2020.It is compared with the overall planning.