摘要
在城市快速发展的背景下,以土地为依托的城市扩张对耕地总量造成了很大的威胁。以南昌市为例,将其均分成8个扇形区,研究南昌市的城市扩张时空演变和扩张模式、耕地面积的时空变化以及近15 a的城市扩张与耕地总量的相关性。结果表明:1)自2000年以来,南昌市一直以一定的速度向外扩张,其扩张过程呈现先增速后减速再增速的趋势。主要沿南面、西南方向、西面、西北方向扩张,并主要以边缘型扩张为主导;2)在城市扩张的过程中,总体上耕地面积持续减少,但在对耕地进行保护的基础上,耕地面积也有一定程度的增多; 3)在2000-2005年和2010-2015年期间,城市扩张与耕地量显著相关,在2005-2010年间,其相关性较低。研究结果说明了城市扩张占用的主要土地类型是耕地,对南昌市的可持续扩张与耕地保护具有重要的理论与现实意义。
Under the background of the rapid development of the city,urban expansion based on land poses a great threat to the total amount of arable land. This article takes Nanchang City as an example and divides them into 8 districts ,which is the spatial-temporal evolution and expansion pattern of urban expansion in Nanchang City, the spatio-temporal change of cultivated land area,and the correlation between urban expansion and total arable land in the past 15 years. The results show that ： 1 ） Since 2000, Nanchang City has been expanding at a certain rate, and its expansion process has shown a trend of deceleration and then growth rate after the first growth rate. The expansion direction of Nanchang City mainly along the south, southwest,west, northwest, and mainly dominated by the edgeexpansion. 2） In the process of urban expansion, in general, the area of arable land continued to decrease. On the basis of the protection of arable land, the area of arable land also increased to some extent. 3 ）During the period of 2000 -2005 and 2010 -2015, urban expansion is significantly related to the amount of arable land, and its relationship is low between 2005 and 2010. The research results show that the type of land occupied by urban expansion mainly comes from cultivated land ,which has important theoretical and practical significance for sustainable expansion and famlland protection in Nanchang City.
作者
赵燕如
危小建
ZHAO Yanru;WEI Xiaojian(School of Geomatics,East China University of Technology,330013,Nanchang,PRC;Key Laboratory for Digital Land and Resources of Jiangxi Province,East China University of Technology,330013,Nanchang,PRC;Key Laboratory of Watershed Ecology and Geographical Environment Monitoring,National Administration of Surveying,Mapping and Geo-Information,330013,Nanchang,PRC)
出处
《江西科学》
2018年第5期759-764,820,共7页
Jiangxi Science
基金
江西省社科规划项目(17GL30)
关键词
城市扩张
耕地
相关性分析
南昌市
urban expansion
arable land
relationship analysis
Nanchang city
