甘肃省城市土地集约利用空间差异的实证分析

目前的土地集约利用评价指标多集在土地利用的现存状态,较少考虑到人地关系对土地效益的影响。而"压力-状态-响应"(Pressure-State-Response,PSR)框架较好地揭示了土地利用中人地作用的链式关系。本文据此构建了相应的评价指标体系,包括1个目标层、3个准则层和12个指标层。同时综合应用主成分分析和GIS方法,对甘肃省城市土地集约利用水平进行评价研究。研究结果表明:甘肃省土地集约利用空间差异显著,由于区位优势和产业结构等因素的影响,陇中地区城市土地集约利用水平最高,河西较高,陇东南最低;PSR系统的协调指数与甘肃省城市土地集约利用水平呈正相关,充分说明了PSR各子系统及其内部各因子之间的协调性很大程度上反映了城市土地集约利用的均衡度,模型可信度较高。最后,在结论基础上提出政策和建议。

Empirical Analysis on Spatial Difference of Urban Land Intensive Use in Gansu Province

At present,evaluating indicator of intensive land use is always focused on existing mode.The indicator less be considered from effect of land efficiency caused by relationship between human and land.Framework of PSR shows a better chain relationship between human and land in land usage.So the relevant system of assess indicator was established based on PSR.The system included one target part,three norm parts and twelve index parts.In addition,the level of intensive land use was researched by using integrated methods of main ingredient analysis and GIS.The result of research showed :(1) There were great spatial differences of urban land intensive use in Gansu Province,the level was higher in central cities than other areas.Longzhong had a better standard of urban land intensive use than Hexi area,while Longnan got the lowest level.(2) Coordinate index of PSR had a positive correlation with the level of urban land intensive use.The balanced degree of the urban land intensive use could be reflected by the subsystem in PSR and their compatibility.So the evaluation system had a good credibility.At last,the writer gave us some suggestions to this problem according to the research results.