摘要：
城市空间扩展的经济绩效是评估城市扩展状态的重要依据之一.针对当前城市空间发展中重扩展轻绩效的问题,提出了基于经济绩效评价城市空间扩展状态的思路方法.以宁夏固原市为对象,以其典型历史时期的高分辨率遥感影像和统计数据为基础数据源,在空间分析技术的支持下,通过层级解构的方法定量化、可视化地分析了研究区空间经济绩效对城市空间扩展的响应过程.研究结果表明,城市空间经济绩效能够敏感地响应城市空间扩展,并印证了绩效时空效应的存在.具体表现为:新扩展区域的空间经济绩效需要一定时间的培育才能得到发挥,在此之前该区域的绩效水平有可能持续走低,而原城区的历史累积对城市经济绩效的稳定性起到关键作用,当原城区的历史累积不足以支撑城市空间快速扩展时,城市扩展模式应得到及时调整.即使城市空间经济绩效的整体水平表现出优化的结果,在新扩展区域绩效水平持续降低的现状下,城市管理主体仍需对是否保持城市空间的快速扩展持谨慎态度,并予以持续的关注和监测以防止空间经济绩效的恶性扭转.最后,建议城市发展中建立起空间经济绩效的评估和监测机制,引导城市空间经济绩效向持续健康的方向发展.%The economic performance of urban space expansion is one of the important bases for evaluating the state of urban expansion.This paper takes Guyuan as the case to reveal the expansion of urban space and its economic performance quantitatively and visually through the historical data of high-resolution remote sensing images and with the support of spatial analysis techniques.The result shows that urban spatial economic performance can sensitively interact with the urban space expansion, and moreover this also confirms the existence of the effect on time and space in performance.Firstly, the spatial economic performance of the newly expanded area needs to be cultivated for a certain period of time, and it is likely to be declined before it can be brought into play.Meanwhile, the original urban area plays a key role to the stability of urban economic performance by the historical accumulation.Secondly, when it is not enough to support the rapid spatial expansion, the expansion pattern should be adjusted timely.Thirdly, when the performance decreasing continuously in the expanded areas and increasing in the original, it is advised that the urban management take caution to monitor the indexes constantly and take actions to keep or prevent the rapid expansion of urban space in case the vicious reversal of economic performance in space.Finally, it is suggested that an evaluation and monitoring mechanism of spatial economic performance should be established in urban development to guide the sustainable development of urban spatial economic performance.
