快速发展期的西北地区中小城市空间扩展分析与评价——以陕西省榆林市为例

发布时间：2018-08-09 08:23

【摘要】：利用榆林市多年的卫星影像数据提取建成区信息,采用多个城市空间动态衡量指数对榆林市建成区的扩展过程、形态特征变化、扩展模式与结构变化、规模与结构的扩展合理性等进行了量化与分析。结果表明:20多年来榆林市建成区高速扩展,且具有阶段性特征;空间形态变化剧烈,各指数的变化特征在前后两个扩展期内具有明显的差异;前一扩展期内的空间规模基本是合理的,而后一时期内不理性的过度扩展现象较为严重,两者间出现的扩展停滞有利于缓冲高速扩展的负面惯性;"扩展—缓冲—扩展"的城市空间扩展模式有利于城市内部空间填充和调整,缓解快速扩展带来的负向效应;不协调因素加剧了空间扩展的低效。并据此提出改善榆林市空间扩展状况的建议。
[Abstract]:Using the satellite image data of Yulin city for many years to extract the information of the building area, using the dynamic measurement index of several cities to extend the building area of Yulin city, changing the shape characteristic, the expansion pattern and the structure change. The expansion rationality of scale and structure are quantified and analyzed. The results show that in the past 20 years, the area in Yulin City has expanded at a high speed and has the characteristics of stages, the spatial morphology has changed dramatically, and the variation characteristics of each index have obvious differences in the two expansion periods. The space scale in the previous expansion period is basically reasonable, while the irrational excessive expansion phenomenon in the latter period is relatively serious. The expansion stagnation between them is beneficial to buffer the negative inertia of high-speed expansion, the urban spatial expansion mode of "expanding-buffer-expansion" is beneficial to the filling and adjustment of urban interior space, and the negative effect brought by rapid expansion can be alleviated. Incongruous factors exacerbate the inefficiency of spatial expansion. Based on this, some suggestions are put forward to improve the spatial expansion of Yulin City.
【作者单位】：长安大学建筑学院;西安建筑科技大学建筑学院;
【基金】：国家自然科学基金“基于空间绩效评价的西北地区中小城市空间扩展及结构化研究”(51178371)
【分类号】：TU984.113

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