摘要
以张掖市为例,基于多时相Landsat MSS/TM/ETM数据和GIS技术,采用人工目视解译和空间叠加方法,提取1977年、1987年、2000年和2010年张掖市城市建设用地扩展数据信息,分时段重点分析33 a间城市扩展强度、城市重心转移、城市形态、扩展方位及其侵占其他用地情况,并揭示了张掖市扩展的驱动机制。结果表明:1改革开放以来,张掖市建设用地扩展了3倍,尤其是2000年以后,城市用地扩展趋势最为明显,占用的土地利用类型主要是耕地和居民点、工矿用地。2目前,城市扩展主要表现为外向扩展和内部填充为主,城市形态趋于紧凑,城市重心总体向东北方向偏移,东北部、西部和南部是城市扩展的主要方位。3自然地理条件对城市扩展起约束和导向作用;社会经济的发展对其有促进作用;政府的决策和城市规划决定了城市扩展的规模和空间格局。
In the process of social development, city, as the most frequent focus of regional human activity, e- volves constantly with social economy development. Since the reform and opening up, Chinese economy enter into a period of rapid development, urban construction and urbanization has made great achievements and urban regional spatial extension expands continually. In this paper, A western typical oasis city in arid area, Zhangye city as an example, we extracted expansion information of urban construction laud-use in Zhangye with artificial visual inter- pretation and overlay technology, focus on analyzing the urban expansion intensity, shift of the city center, urban morphology, direction of urban expansion as well as the situation of the land occupied by urban expansion during 30 years of different period, and reveal the driving mechanism of urban expansion in Zhangye based on multi-temporal Landsat MSS/TM/ETM data and GIS. The main conclusions are as follows： ① since the reform and opening up, the urban construction land expands the three times in Zhangye city. The Urban land expansion trend is most obvi- ous after 2000 year, the arable land, residential area and mining land is mainly the occupied land-use type. ② At present stage, the urban expansion mainly being outgoing extension and internal filling, the space form of the urban is compact, the city center shifted to the northeast, and the northeast, south and west is the mainly expansion di- rection. ③ The Natural geography condition constrains and guides the urban expansion; the social economy devel- opment has a promoting effect; and the government decision making and urban planning determines the scale and spatial pattern of urban expansion. The above research result is very significant to provide scientific development strategy for making Zhangye an oasis city being fit for living, touism, business, etc.
出处
《干旱区研究》
CSCD
北大核心
2015年第3期598-605,共8页
Arid Zone Research
基金
国家自然科学基金项目(41271133)资助
关键词
绿洲城市
城市用地
扩展
驱动机制
张掖
oasis city
urban land
expansion
drive mechanism
Zhangye city
