摘要
利用鄱阳湖地区2000、2005、2010、2013年4期土地利用现状图,采用扩张强度、扩张动态度、空间自相关等方法,分析了2000～2013年鄱阳湖地区城镇用地扩张的空间差异,利用GWR模型深入探讨了城镇用地空间扩张的驱动机制。结果表明：（1）在2000～2013年期间,鄱阳湖地区城镇用地快速扩张,由332.86 km2增至742.72 km2,城市重心向东南迁移,迁移量为13.99 km,以正西方位扩张规模最大,达到267.89 km2;期间以2000～2005年扩张最为显著;（2）鄱阳湖地区城镇用地扩张区域差异明显,南昌市周边和交通通道交汇处高速扩张;根据空间集聚Moran’s I指数值,城镇用地扩张空间自相关性不明显,空间集聚特征由中心城市向外围减弱,且逐年减弱;（3）不同驱动因素对鄱阳湖地区不同区域城镇用地空间扩张的影响程度和方向存在较大差异,财政总收入、户籍人口对城镇用地扩张的贡献为负,而地区生产总值、固定资产投资起推动作用。
According to the land use status maps of Poyang Lake region in the years 2000,2005,2010 and 2013,using the methods of expansion intensity,expansion dynamics,spatial autocorrelation and so on,the author analyzed the spatial differences of urban land expansion in Poyang Lake region during 2000 ~ 2013,and adopted GWR model to deeply explore the driving mechanism of urban land spatial expansion. The results showed that：（ 1） During 2000 ~ 2013,the urban land in Poyang Lake region expanded rapidly,and the area increased from 332.86 km2 to 742.72 km2; the gravity center of urban land moved southeastward with the migration distance of 13.99 km; the scale of urban land expansion to due-west direction was the largest,reaching 267.89km？. In the past 13 years,the urban land expansion from 2000 to 2005 was the most obvious;（ 2） There were significant differences in the spatial expansion of urban land in Poyang Lake region,for example,the rapid expansion of urban land mainly happened in the circum of Nanchang city and the traffic aisle interchange. According to Moran’s I index value for spatial agglomeration degree,a weak spatial autocorrelation existed in the urban land expansion,and the spatial agglomeration degree weakened from central city to outskirts and year by year;（ 3） Various driving factors had different effects on the spatial expansion of urban land in different districts of Poyang Lake region,and the general financial revenue and the registered population had a negative contribution to the urban land expansion,while the regional GDP and fixed investments had a promotive effect on it.
出处
《江西农业学报》
CAS
2016年第8期101-109,共9页
Acta Agriculturae Jiangxi
基金
江西师范大学鄱阳湖湿地与流域研究教育部重点实验室开放基金项目(PK2013008)
