摘要
以1987、1990、1994、1998、2002、2007、2011、2015年8期的Landsat TM/OLI遥感影像为基础,利用GIS的空间分析方法,选取城市扩展强度、分形维数、紧凑度、城市重心坐标等指标,研究华北平原腹地的山东省聊城市1987年以来的城市空间扩展特征;并结合相关统计数据对聊城市城市扩展的驱动力进行分析。结果表明:1987—2015年,聊城市建成区规模逐年扩大,由1987年的20.81km^2扩展到2015年的123.87km^2,年均扩展面积3.68km^2,扩展强度指数达17.69%。城市紧凑度整体上呈现波动下降趋势;分形维数先增加后减小再增加;城市扩展方向总体上呈现向东波动迁移的特征,城市形态呈现"扩张-内部填充-再扩张"的趋势。驱动力方面,自然地理条件是城市扩展的基础,经济发展与城市扩展相互促进,交通基建和国家政策规划是影响聊城市城市扩展特征的主要驱动因素。
Based on the Landsat TM/OLI images in 1987,1990,1994,1998,2002,2007,2011 and2015,and GIS spatial analysis method,the urban spatial expansion characteristics of Liaocheng city in the North China plain were analyzed since 1987 years based on the indexes of the intensity of urban spatial expansion,compact ratio,fractal dimension and gravity coordinates.The driving forces oftemporal and spatial expansion characteristics of Liaocheng city were also systematically analyzed by some statistical data.The data show that：Liaocheng＇s built-up area has expanded each year from 1987 to 2015,and the area increased from 20.81 km^2 in 1987 to 123.87 km^2 in 2015;annual expansion area is about 3.68 km^2,and the extension strength is 17.96%;the compactness of the city decreases with fluctuations;the fractal dimension increases gradually from 1987 to 2002,then fractal dimension decreases from 2002 to 2011 and rises finally;the analysis of city expansion direction showed an easterly shift and city morphology is tending to the condition of＂expand-infill-re-expand＂.Studies on the driving forces show that natural environmental factors are the foundation of the urban expansion,economic development and urban expansion can promote each other,and that traffic construction and government policy are the main driving forces for the urban expansion.This study will help understand the expansion characteristics of the similar cities in the North China plain.
出处
《广西师范大学学报（自然科学版）》
CAS
北大核心
2017年第4期136-144,共9页
Journal of Guangxi Normal University:Natural Science Edition
基金
聊城大学博士基金(318051530)
国家自然科学基金(41201602)
