| WuFeng County as "China famous tea of the township" in yichang of hubei,has a long history,unique natural conditions make WuFeng County for economic development,especially since 20115 the county relocation after reconstruction,become the new county fishing the town got the unprecedented rapid development,become is WuFeng County political,economic and cultural center and transportation hub.The development of yuyangguan town not only drives the overall development of wufeng county,but also reflects the development trend of wufeng county.To explore fishing the before and after the relocation of the new county town of specific changes,the analysis of the new county reconstruction of fishing in the town of space form evolution characteristics,this article selects the county relocation(2008-2018)before and after nearly a decade of fishing in the town as the research object,from the external space form and internal space form two aspects,further study of the urban space morphology evolution characteristics and influencing factors,for other mountains provide theoretical basis for the spatial development of small towns.Firstly,this paper quantitatively analyzes the relationship between the evolution characteristics of the outer shape of the town and the expansion of the town through the morphological parameters such as compactness,fractal dimension and shape index.Then,ArcGIS software is used to analyze the evolution characteristics of urban morphology in the research area from the perspective of functional land use evolution,and reveal the evolutionary relationship between urban morphology and urban expansion.Finally,through analysis and summary,the evolution mechanism of the spatial form of the research area is discussed from five aspects of economic development level,population,natural environment conditions,transportation and policy.The following conclusions can be drawn from the comparison of the evolution characteristics of spatial morphology over the years:(1)The evolution of external spatial morphology in the research area is characterized by the combination of external expansion and internal integration.Based on urban area average annual growth to nearly a decade since the fishing in the town built up area is expanded into rapid expansion period(2006-2008),expansion wave period(2009-2011),high-speed expansion stage(2012-2016),three periods,and according to the anisotropic characteristics of different period extension,and can analyze the rapidly expanding period in 2006-2008 and 2012-2016 high-speed expansion phase belong to external expansion phase,2009-2011,fishing in the town,in the period of economic adjustment is therefore the development of urban basic internal adjustment stage;(2)The type of town extension in the research area is closely related to the extension of the outer shape of the town,and it changes in stages.According to the data,the compactness of yuyangguan town is maintained between 2.2 and 3.0,the fractal dimension is maintained between 1.4 and 2.5,and the morphological index is maintained between 1.5 and 2.0.From 2007 to 2009,the town size was small,the development was slow,and the range of change was small.Therefore,the town shape was compact and the contour was simple.From 2010 to 2012,when the new county was relocated,yuyangguan town greatly strengthened the construction of the new county and highway,and the town expanded outwards greatly,with obvious changes.As a result,the town’s compactness decreased and its shape became more complex.Compactness index,2013-2016,springback and unstable,and fractal dimension index and morphological index quickly reduce,this is because when fishing the close of the new county in the town of relocation work has been basically completed,is in the internal adjustment filling stage,improve internal county land use efficiency,adjusting land use structure,filling town outside edge clearance;(3)The spatial and temporal change of urban functional land reflects the process of urban spatial agglomeration and diffusion in the research area.From the internal main function of land use change,the area is increased to 2018 from the previous 3.18 km2 of10.18 km2,residential land,land for exclusive use by highways and other construction land as the main functions of yu Yang guan town land,a total of three increased 4.41km2,accounted for 35.07% of total growth,32,49% and 1.78%,forest land,tea,paddy field area to reduce the most after is from the new county seat moved,reduced 2.44 km2,respectively,1.65 km2,and 0.99 km2.Fishing in the town of the internal space is extended main converting land for agriculture and natural to the social and industrial land,the direction and function of land use and the whole of the proper external space form with the direction of diffusion,residential land populous cities and towns,concentration degree is high,the spatial distribution of highway land shows the early in the old city in the northeast from scattered distribution gradually spread to the northwest,and southern trend,coordinated with residential land jointly made the urban space form to the northeast,northwest,south three wing agglomeration spatial pattern,and other construction land is strengthen mountain towns internal structure adjustment and an important part of edge filling;(4)The spatial morphology difference of small mountain towns is affected by various factors,and is most affected by terrain and traffic.The factors influencing the evolution of spatial form of small towns in mountainous areas mainly include the level of economic development,population,natural environmental conditions,transportation and policy.In a world,taking Yuyangguan Town of Wufeng County in hubei province as the research object,this paper makes a systematic qualitative and quantitative analysis of the town,and reveals the evolution law of the spatial morphology with unique characteristics of small towns in mountainous areas that cannot be found by the traditional research on urban spatial morphology.The study of the spatial form in this research area is of great significance to the small towns in the mountains in other regions,and provides some theoretical references for the construction of small towns. |
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