城市扩展与城市土地集约利用存在内在联系。以干旱区绿洲城市乌鲁木齐的城市扩展特征为出发点,研究城市扩展与城市用地集约化间的动态相关性,评价城市对土地利用压力的响应能力。结果表明在1990—2014年,乌鲁木齐城市用地扩展呈现从缓慢扩展到快速扩展,再到中速扩展的特点;各时期城市用地紧凑度小,分形维数大,建设用地分布分散,城市用地的增加主要依靠于城区用地向内部的填充;对应时期内的城市土地集约利用水平呈现波动上升的特点,在近10年来城市用地集约化显著;经相关分析得出:城市用地的集约化与城市建成区面积的扩展速度关系不大,但受城市扩展的空间形态影响较大,建成区分散度、破碎度越大,则城市用地越趋于集约化发展。城市扩展与城市用地集约化二者的耦合关系可反映出一段时间内城市土地利用的效率或对用地压力的响应程度:当城市扩展强度>土地集约利用率,说明在城市化进程中存在土地浪费现象;当城市扩展强度<土地集约利用率,说明城市土地利用高效,应以经济—社会—生态三者协调发展为原则开展合理的城市土地集约利用。 There is an inherent relationship between urban expansion and intensive use of urban land. Taking the urban expansion characteristics of Urumqi, an oasis city in arid area as a starting point, this paper studies the dynamic correlation between urban expansion and intensive urban land use, and evaluates the ability of cities to respond to land use pressure. The results show that from 1990 to 2014, the urban land expansion in Urumqi is characterized by a slow expansion, a rapid expansion and a moderate expansion. Urban compactness, large fractal dimension, decentralized construction land and urban land increase Mainly due to the filling of urban land to the interior; the intensive utilization of urban land during the corresponding period showed the characteristics of fluctuating and rising. In the recent 10 years, the intensive use of urban land was remarkable. The correlation analysis shows that the intensive urban land use and urban built-up area The expansion rate of the area has little to do, but the spatial form of the urban expansion has a greater impact. When the built-up area is decentralized and the degree of fragmentation is larger, the urban land tends to be intensively developed. The coupling relationship between urban expansion and intensive urban land use can reflect the efficiency of urban land utilization or the response to land pressure over a period of time. When the intensity of urban expansion> intensive land utilization rate indicates the existence of land waste in the urbanization process Phenomenon; when the strength of urban expansion