无锡城市空间扩展及其边界划定研究

发布时间：2018-12-07 19:28

【摘要】：改革开放以后,伴随经济飞速发展,我国城市空间不断扩张。过度重视经济效益导致城市出现空间蔓延、土地低效利用以及生态环境破坏等一系列问题。城市空间扩展边界作为应对上述问题的有效手段应运而生,国内对城市空间扩展边界的研究相对西方发达国家较晚,在理论基础和划定方法方面均处于探索研究阶段。因此,如何结合中国国情从不同视角出发划定合理可行的城市扩展边界,使其为未来城市空间发展提供科学依据,成为地理学等众多学科目前亟待解决的重要问题。本文以我国发达地区无锡市为例,从论文选题背景出发,首先梳理研究区的社会经济发展和土地利用概况,并结合遥感和GIS技术分析近30年来无锡城市空间扩展的过程规律、驱动因素和存在的主要问题,预测规划期内城市空间扩展的规模和最大可能范围;然后从生态环境、耕地严格保护的角度划定城市开发的边界,作为城市空间扩展的约束边界;最后对比上述边界范围与无锡城市规划确定的城市空间范围,分析其土地开发布局和扩展方向上的差异及原因,从而为未来城市空间扩展和规划调整提供优化建议。通过研究,本文的主要结论如下:(1)通过对无锡城市空间扩展分析,无锡城市扩展经历了周期性变化,在扩展方向和强度上存在各向异性,空间形态从最初的星楔状扩展转变为后期的组团式扩张。影响城市空间扩展的因素主要包括无锡经济发展、生态环境保护以及政府的决策;(2)考虑到城市空间的动态性和未来的可持续扩展,论文在边界划定时既从“生长”的角度出发预测了规划期内无锡市发展的最大规模和范围,又从保护优先的生态适宜性评价出发划定了城市开发的规模下限和范围,并与现有城市规划的城市边界相比较,发现基于不同视角划定的边界在总规模和扩展方向上都存在一定差异。(3)基于城市扩展过程确定的城市规模和范围,侧重于在规划期内开发更大规模的土地来满足城市人口和经济增长的空间需求;而基于城市生态适宜性评价的边界更多的是从土地生态适宜性程度和耕地保护出发划定城市规模和范围。由于生态保护是长期性任务,没有规划上的期限,由此造成边界范围和用地布局的存在时间尺度上差异。(4)不同视角确定的城市边界各有目的和特点,本文结合各方法优势,综合考虑经济社会、生态环境、土地需求规模等要素,以期为未来城市空间可持续发展和城市规划提供服务,并为其他快速发展城市的空间边界划定提供参考。
[Abstract]:After reform and opening up, with the rapid development of economy, the urban space of our country expands constantly. Paying too much attention to economic benefits leads to a series of problems, such as the spread of urban space, the inefficient use of land and the destruction of ecological environment. As an effective means to deal with the above problems, urban spatial expansion boundary has come into being. The study of urban spatial expansion boundary in China is relatively late than that in western developed countries, and it is still in the stage of exploration and research in the theoretical basis and the method of delineation. Therefore, how to draw a reasonable and feasible urban expansion boundary from different angles of view combined with China's national conditions, so as to provide scientific basis for the future urban spatial development, has become an important problem to be solved urgently in geography and many other disciplines. This paper takes Wuxi City as an example, starting from the background of this paper, firstly combing the general situation of social and economic development and land use in the research area, and combining remote sensing and GIS technology, analyzing the process of urban space expansion in Wuxi in the past 30 years. Driving factors and main problems, predicting the scale and the maximum possible range of urban space expansion during the planning period; Then the boundary of urban development is delimited from the angle of ecological environment and strict protection of cultivated land as the constraint boundary of urban spatial expansion. Finally, by comparing the above boundary range with the urban space range determined by Wuxi urban planning, the differences and reasons of the land development layout and expansion direction are analyzed, and the optimization suggestions for the future urban spatial expansion and planning adjustment are provided. The main conclusions of this paper are as follows: (1) through the analysis of urban spatial expansion in Wuxi, Wuxi urban expansion has undergone periodic changes, and anisotropy exists in the direction and intensity of urban expansion. The spatial form changed from the initial wedge-shaped expansion to the later group expansion. The factors influencing urban spatial expansion mainly include economic development, ecological environment protection and government decision-making in Wuxi. (2) considering the dynamic nature of urban space and the sustainable expansion in the future, the paper predicts the largest scale and scope of Wuxi city development in the planning period when the boundary is delimited from the perspective of "growth". Proceeding also from the ecological suitability assessment of priority conservation, the lower limit and scope of urban development are delineated and compared with the urban boundaries of existing urban planning, It is found that there are some differences in the total scale and expansion direction of the boundary delineated from different perspectives. (3) based on the urban expansion process, the size and scope of the city are determined. Focus on the development of larger land during the planning period to meet the spatial needs of urban population and economic growth; And the boundary based on urban ecological suitability evaluation is to delimit the scale and scope of the city from the degree of land ecological suitability and the protection of cultivated land. Because ecological protection is a long-term task and there is no time limit for planning, the boundary range and land layout are different in time scale. (4) the urban boundary determined from different perspectives has its own purpose and characteristics. Combined with the advantages of various methods, this paper comprehensively considers the factors such as economy and society, ecological environment, scale of land demand and so on, in order to provide services for the sustainable development of urban space and urban planning in the future. It also provides reference for the space boundary demarcation of other rapidly developing cities.
【学位授予单位】：南京师范大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：C912.81

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