基于主成分分析和物元模型的河南省城市土地集约利用对比研究

Comparison on Urban Intensive Land Use in He′nan Province Based on Principal Component Analysis and Matter-element Model

提高城市土地集约利用水平对缓解人地矛盾、提高土地利用效率等具有重要意义。以河南省17个省辖市的城市土地利用为研究对象,根据城市土地集约利用的内涵,构建一套衡量城市土地利用集约度的指标体系,并采用主成分分析法和物元模型2种方法对各城市土地利用的集约度进行了对比分析。研究结果表明,2种方法测评的城市土地利用集约度,在测评结果排序、集约利用等级划分和空间分布等方面虽有差异,但存在较大的相似性。豫北、豫西南和豫西的城市土地集约利用程度较高,而位于豫东和豫东南的城市土地集约利用程度则相对较低。2种方法在分析影响城市土地集约利用程度的内部因素时差异较大。研究结论认为,未来河南省各城市要加大土地投入力度,改善土地生态环境质量,以促进城市土地集约利用程度的提高。

Improving the intensive use degree of urban land is of importance to alleviate the contradiction between human being and land resources and improve land use efficiency.According to the intensive use connotation of urban land,a set of indexes is established to determine the intensive use degree of urban land.A comparative analysis is made to determine the intensive use degrees for the urban lands of 17 cities in He′nan Province using principal component analysis and matter-element method.Results show the two methods have greater similarities in the order,classification and spatial distribution of evaluation results,despite of some differences.The cities in the northern,western and southwestern parts of the province have more intensive use degree of urban land than the cities in the eastern and southeastern parts.The two methods are quite different in the analysis of internal factors about intensive use of urban land.It is suggested that all the cities should increase land investment and improve land environmental quality in entire province in the future to promote the increasing intensive use of urban land.