【摘要】 为揭示城市化过程中景观稳定性及其区位分异,本文在多时相Landsat TM遥感影像的支持下,应用Kappa指数方法对1988—2008年间南京市城乡梯度上景观要素(除丘陵山地及大规模水体外)的空间位置变化与数量变化进行了研究。结果表明:耕地的数量稳定性较高,但空间位置稳定性较低;而聚落用地空间位置稳定性较高,但数量稳定性却较低;水体的空间位置和数量稳定性都比较高;林地和其他用地的数量以及空间位置稳定性都比较低。在城乡梯度上,随着城市化程度增加,景观的空间位置稳定性呈上升趋势,而数量稳定性则表现出下降趋势。对于已完成城市化的中心城区,景观的数量稳定性迅速上升,其景观要素的组成和空间分布特征均趋于稳定。聚落用地和耕地的空间位置和数量稳定性在不同城乡梯度带间变化较大,而水体和林地的空间与数量稳定性受城市化过程影响较小。更多还原

【Abstract】 By using multi-temporal Landsat TM images and the Kappa index,this paper studied the location variation and quantification variation of the landscape elements(except for mountains and large water bodies) along the urban-rural gradient of Nanjing in 1998-2008,aimed to quantify the landscape stability and spatial differentiation during urbanization.In the study area,cultivated land presented high quantification stability but low location stability,whereas settlement had high location stability but low quantification stability.Both the location stability and the quantification stability of the waters were high,but those of forested land and other types of landscape elements were low.Along the urban-rural gradient,landscape showed increasing location stability but declining quantification stability with the increasing level of urbanization.For the urbanized area,quantification stability increased rapidly,and the composition and spatial features of landscape elements were prone to be steady.Settlement and cropland showed substantial variations in location stability and quantification stability in different zones along the urban-rural gradient,while waters and forestland were less affected in terms of the location stability and quantification stability in the zones.更多还原