Study On The Process,Model And Driving Force Of Oasis Urban Space Expansion

Urban expansion is the evolution process and spatial expression of human activities and regional background environment in time and space.The urban expansion mode depends on the economic development needs and resource base within the region.The oasis towns in arid areas are highly dependent on water sources and fragile ecological environment.The orderly progress of economic development and ecological environment is conducive to the sustainable development of the Manasi River Basin.In order to explore the oasis urban structure,urbanization level,urban expansion mode and driving mechanism,and to find a suitable development mechanism for oasis cities,this paper uses GIS spatial analysis methods,geodetectors and other methods to explore the current status of oasis urban structure in the Manasi River Basin.Spatial expansion mode and driving force of Oasis Towns,using ENVI 5.3,ArcGIS 10.3 software platform to classify land use remote sensing images,and extract and superimpose the vector boundaries of watershed oasis town construction land in 2000,2008 and 2016 This paper analyzes the overall spatial form expansion mode of Oasis towns,and uses the landscape expansion index method to explore the type of land expansion of oasis towns.Based on this,the overall shape pattern of urban expansion in each stage is summarized(concentric circle mode,multi-core mode,fan-shaped mode).,expansion mode(old city transformation,spread cakes,new towns)and expansion types(filled,edge,leap);second,the integration of natural,social,economic three dimensions,the use of geo-detector models for numerical data The natural factors of socioeconomic factors and surface data are respectively Detecting to explain the expansion of Oasis towns and exploring the driving forces affecting the expansion of Oasis cities;finally,combining the results of geodetection detection to analyze the spatial shape changes,industrial structure changes,industrialization,planning management and marketization results and summary of the oasis cities The expansion mechanism of the Oasis City shows that:(1)The gender ratio of the Manasi River Basin is coordinated,and the age structure of the population belongs to the age structure of the adult population;the urban function of Shihezi is industrial city,and the economic structure is mainly industrial;compared with Shihezi City,the pillar industry of Shawan County is agriculture.At present,the proportion of agriculture is still increasing.The proportion of the three major industrial economic output values in Manasi County is balanced;the urbanization level of the Manasi River Basin is lagging behind,and the population urbanization rate in the basin is stronger than the industrialization rate and land urbanization rate.(2)The expansion of urban construction land in the Manasi River Basin transitioned from a slow and compact expansion stage to a multi-directional divergence expansion stage,forming three points in Sandaohezi Town,Manasi County and Shihezi City of Shawan County.For the center,the 312 National Highway along the east-west direction and the west line of the Lanzhou-Xinjiang Railway respectively expand,and the multi-center expansion of the 216 and 217 national highways along the north-south axis is the axis.(3)In 2000-2008,the expansion mode of construction land in Shihezi City of the basin was dominated by enclave and marginal type.The enclave type dominated the number of patches,and the edge type dominated the expansion area.In 2008-2016,the expansion pattern of Shihezi construction land in the basin is still dominated by enclaves and margins,but the enclave type is larger than the marginal expansion in the number and area of patches.On the whole,the marginal expansion of construction land in Shihezi Town relies on the transportation network,expanding along the main road,and the expansion of the enclave is distributed near the transportation network.The expansion of the construction land in the basin transitions from a slow and compact expansion stage to a multi-directional divergent expansion.stage.(4)There are interactions between socioeconomic factors and natural factors and other factors on the expansion of construction land in Shihezi City.After any two factors interact,the factors have linear or nonlinear enhancement to the expansion of the built-up area.When factor detectors are used to detect the socio-economic factors explaining the expansion of construction land in Shihezi City,the PD values of each factor are larger,and the explanatory power between each interaction factor is greater than 85.5%.The interaction between the factors is greening.The interpretation of area,urban population,per capita GDP,total output value of construction industry and other factors is significantly stronger.When using geo-detectors to detect the natural factors and other factors to explain the expansion of construction land in Shihezi City,the PD values of each factor are small,and each factor shows an increasing trend after cross-detection.(5)Under the environment of advocating ecological civilization,urban planning and management guidance has gradually become the basis of urban development,but the internal driving of urban expansion in Manasi River Basin comes from the organic combination of three major industries and market demand,superior oasis agriculture.The foundation provides strong support for industrial development.The accumulation of wealth and the increase in domestic demand have provided the impetus for the vigorous development of the tertiary industry.