摘要
本文以灯光密度表征建设用地产出效率,采取KDE、ESDA、SDE等方法对中国县域尺度2000-2015年建设用地产出效率的总体特征、时空演变以及方向分布进行分析,研究发现:(1)夜间灯光总亮度与建设用地出产出存在较强的相关关系,说明可用灯光总亮度表征建设用地产出,以灯光密度反映建设用地产出效率具有一定的科学性。(2)建设用地产出效率东高西低,持续上升;增长速度西高东低,中部居中,但区域间年均增长率最大相差0.56%,整体较为均衡。(3)虽然建设用地产出效率由2000年的0.008单位灯光/km2持续上升至2015年的0.025单位灯光/km2,但其核密度曲线始终处于中低水平且右侧区间不断扩大,说明中国建设用地产出效率总体水平较低,呈现出中低水平俱乐部收敛的特征。(4)建设用地产出效率的全局Moran's I指数都大于0,建设用地产出效率存在正向空间分布特征,且其局部空间格局变化较小,存在稳中有动,强中有弱,弱中有强的特点。(5)方向分布上,建设用地产出效率的方位角始终在72.420o与81.066o之间,说明东北-西南方向为建设用地产出效率的主要方向,且标准差椭圆的主轴与辅轴标准差都有所增加,说明在建设用地产出效率的主要方向与次要方向上都发生了分散现象。
Since the land economic density can only characterize the economic utilization efficiency of construction land,the lighting density of construction land is used to characterize the output efficiency of construction land.and the Kernel density analysis,ESDA and the SDE is used to analysis the spatial-temporal pattern of it.The results show that:(1)There is a strong correlation between nighttime lighting and construction land output.It is scientific to use the light density to characterize the output efficiency of construction land.(2) The efficiency is high in the east and low in the west.The output efficiency of construction land in each region continues to increase while the regional differences continue to increase.However,the average annual growth rate between regions is 0.56%,which is relatively balanced.(3)The kernel density curve indicating that the overall level of construction land output efficiency in China is low.and presents the trend converging to middle and low level club.(4)The overall Moran's I index of construction land output efficiency is positive,indicating that there is a positive spatial distribution characteristics of construction land output efficiency and the local spatial pattern changes little,there are stable and dynamic,strong and weak,and weak and strong.(5)The azimuth of construction land output efficiency is always between 72.420~and 81.066~,indicating the northeast- southwest direction is the main direction of the output of construction land,the main direction and the secondary direction of the construction land output benefit has dispersion.
作者
周翼
谢保鹏
陈英
赵鸿雁
裴婷婷
ZHOU Yi;XIE Baopeng;CHEN Ying;ZHAO Hongyan;PEI Tingting(College of Management,Gansu Agriculture University,Lanzhou 730030,China;College of resources and environment,Gansu Agriculture University,Lanzhou 730030,China)
出处
《地球信息科学学报》
CSCD
北大核心
2018年第12期1733-1744,共12页
Journal of Geo-information Science
基金
国家自然科学基金项目(71563001)~~
关键词
建设用地灯光密度
建设用地产出效率
时空演变
县域
construction land lighting density
construction land output efficiency
time-space evolution characteristics
county level
