Research on the spatiotemporal evolution and influencing factors of urban expansion in the Xi'an metropolitan area
Against the backdrop of rapid urbanization in our country,urban land is influenced by various factors and exhibits different evolutionary characteristics in both time and space.This article takes the Xi'an metropolitan area as an example to construct a land use transfer matrix,and studies the urban expansion of the Xi'an metropolitan area in 2000,2010,and 2020,depicting the temporal and spatial evolution characteristics of urban expansion in the Xi'an metropolitan area.On this basis,a geographic detector is used to analyze the influencing factors of the urban spatial pattern evolution in the Xi'an metropolitan area.The research results show that:(1)The urban built-up area in the core area of the Xi'an metropolitan area has been accelerating its expansion trend for 30 years,and the expansion speed has been continuously accelerating since 2010;However,the expansion intensity first decreased and then increased.During the period of 1990-2000,the expansion intensity exceeded 100%,which was an accelerated expansion period.As the urban built-up area had already reached a large base in the early stage,the speed of urban expansion gradually declined after 2000,and the expansion intensity slowly increased from 2010 to 2020.(2)The spatial characteristics of urban expansion in the Xi'an metropolitan area indicate that the expansion of the core area of the Xi'an metropolitan area has obvious phased features:the jumping expansion stage(2001-2005);Circle filling stage(2006-2010);Comprehensive expansion stage(2011-2015);Westward Crossing Stage(2016-2020).(3)The single factor detection analysis results of the geographic detector show that the interaction explanatory power between the general budget revenue of local finance and the income gap index between urban and rural residents on the proportion of urban and rural industrial and mining construction land is the highest,at 0.677;The interaction explanatory power between local fiscal general budget revenue and other factors is the highest,all greater than 0.45.The total output value of agriculture,forestry,animal husbandry,and fishery ranks second,both exceeding 0.35.The proportion of urban and rural industrial and mining construction land is mainly driven by the general budget revenue of local finance,the total output value of agriculture,forestry,animal husbandry and fishery,and other factors.This article provides a theoretical basis for studying the evolution process of urban spatial pattern in the Xi'an metropolitan area and revealing the impact mechanism of urban land use spatial pattern.
urban expansiontemporal and spatial evolutioninfluencing factorsgeodetectorXi'an metropolitan area
国家科技期刊平台
NSTL
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