黄河流域城镇人口和用地变化的关联格局及地域类型

The correlation pattern and regional types of urban population and land use changes in the Yellow River Basin

黄河流域城镇人口和城镇用地的关联格局及地域类型对人地系统协调发展具有重要指导意义。基于人口普查和城镇用地栅格数据,运用城镇人口变化指数、城镇用地扩展强度指数、标准差椭圆等方法,揭示2000—2020年黄河流域城镇人口和城镇用地时空分异动态特征,并构建城镇人口和城镇用地协同发展系数,划分城镇化地域类型。结果表明,(1)黄河流域2000—2020年城镇人口增长和城镇用地扩展均呈阶段式变化,城镇人口由中高速增长为主,转为以中低速增长为主,城镇用地面积呈现持续增加的趋势,同一城市不同阶段的城镇扩展强度具有由强变弱的特征;(2)黄河流域2000—2020年城镇人口和城镇用地的标准差椭圆长、短轴的差值不断增大,城镇人口增长和城镇用地扩张在时空格局上吻合性较强;(3)黄河流域城镇化地域类型可以划分为5类,2000—2010年城镇化地域类型呈现自西向东依次分布的趋势,2010—2020年呈现自东南向西北依次分布的格局。黄河流域新型城镇化发展应构筑区域协同发展体系,加快产业结构转型升级,统筹城乡发展,促进黄河流域人地系统可持续发展。

Identifying the correlation pattern and regional types between urban population and urban land use in the Yellow River Basin is of great guiding significance for the coordinated development of the human land system.Based on population census and urban land grid data,using methods such as urban population change index,urban land expansion intensity index,and standard deviation ellipse,this study reveals the spatiotemporal differentiation dynamic characteristics of urban population and urban land in the Yellow River Basin from 2000 to 2020,and constructs a coefficient for coordinated development of urban population and urban land,dividing urbanization regional types.The results show that:(1)From 2000 to 2020,the urban population growth and urban land expansion in the Yellow River Basin showed a phased change,with urban population mainly increasing at a medium to high speed,and then transitioning to a medium to low speed.The urban land area in the Yellow River Basin shows a continuous increasing trend,and the urban expansion intensity of the same city at different stages has a decreasing characteristics from strong to weak.(2)The difference between the long and short axes of the standard deviation ellipse of urban population and urban land in the Yellow River Basin from 2000 to 2020 continues to increase,indicating a strong consistency between urban population growth and urban land expansion in terms of spatial and temporal patterns.(3)The urbanization regional types in the Yellow River Basin can be divided into five categories.From 2000 to 2010,the urbanization regional types showed a trend of distribution from west to east,and from 2010 to 2020,they showed a pattern of distribution from southeast to northwest.The development of new urbanization in the Yellow River Basin should build a regional coordinated development system,accelerate the transformation and upgrading of industrial structure,coordinate urban and rural development,and promote the sustainable development of the human land system in the Yellow River Basin.