城市土地集约利用与生态效率耦合协调分析——以东北地区为例

运用全局主成分分析法、熵权TOPSIS法,并通过耦合协调度模型及探索性空间数据分析,对东北地区2006—2017年城市土地集约利用程度与生态效率水平进行评价,进而对两系统耦合协调度的时空演变及空间集聚特征展开探究。结果表明:(1)区域土地利用效率和生态效率总体均呈上升态势,但没有城市实现理想上的同步发展,土地集约利用滞后是限制协调度的主要因素。(2)城市土地集约利用与生态效率间的耦合度较高,协调关系逐步优化,协调类型从中度失调过渡到初级协调,年均指数为0.543。省域协调度值由北向南逐渐递增,哈尔滨—大连交通经济带城市协调度水平整体较好,北方边缘城市带协调度有待提高。(3)耦合协调度相近的城市彼此邻近,表现出“北冷南热”的空间集聚分布规律,总体格局相对稳定。

Coupling and Coordination Analysis of Urban Land Intensive Use and Ecological Efficiency--A Case Study of Northeast China

Applying the method of global principal component analysis and entropy weight TOPSIS,through the coupling coordination degree model and exploratory spatial data analysis,the paper evaluates the degree of urban land intensive use and the level of ecological efficiency in northeast China from 2006 to 2017,and further explores the spatial-temporal evolution and spatial agglomeration characteristics of the coupling coordination degree of the two systems.The results show that:(1)The regional land use efficiency and ecological efficiency are on the rise as a whole,but no city has achieved the ideal synchronous development,and the lag of land intensive use is the main factor limiting the coordination degree.(2)The coupling degree between urban land intensive use and ecological efficiency is relatively high,and the coordination relationship is gradually optimized.The coordination type changes from moderate imbalance to primary coordination,with an average annual index of 0.543.The coordination degree of the provinces increase from north to south,and the urban coordination degree of Harbin-Dalian transportation economic belt is generally good,and the coordination degree of cities in the northern edge need to be improved.(3)Cities with similar coupling coordination degree are adjacent to each other,showing the spatial agglomeration and distribution rule of"cold in the north and hot in the south",and the overall pattern is relatively stable.