黄土丘陵沟壑区土地利用空间结构的计量地理分析──以甘肃省天水市为例

根据1996—2008年土地利用详查和变更调查数据,运用计量地理模型和GIS空间分析技术,以天水市为例,对研究区的土地利用空间结构现状及其变化进行了定量分析。结果表明:天水市土地利用空间结构存在较大的内部差异,土地利用空间结构的多样化指数较高;近12年来,园地和交通运输用地增加显著,土地利用程度指数变化不大,总体略有下降;土地利用的信息熵总体增加,土地利用整体趋于无序性,土地的紊乱度在增加,土地利用类型处在调整期。

Analysis on Land-use Spatial Structure in Loess Hilly Regions Based on Quantitative Geographic Model 'A Case Study of Tianshui City

Based on the sift research and changing data of land use from 1996 to 2008, the current situation and changes of land-use spatial structure in Tianshui were analyzed by applying GIS technology and quantitative geographic model. The results indicated that there were obvious internal differences in land-use spatial structure. Firstly, the diversity index of spatial structure was comparatively high; Secondly, the garden plots and traffic lands increased obviously, though the index of land use degree fluctuated little since 1996, decreasing slightly as a whole; Thirdly, the information entropy of land use increased generally, and the total land use tended to random, the disorder degree of lands begins to increase and the types of land use are in a period of adjustment.