西宁市主城区土地利用时空变化驱动力分析

Analysis on Driving Forces of Spatiotemporal Changes of Land Uses in Xining City

土地是人类生存发展的重要物质基础,分析影响土地利用结构的各项因素,包括自然环境因素和社会经济因素,都可以为更加规范合理地利用土地提供很好的借鉴作用。利用西宁市2001年和2014年两期的Landsat影像数据和DEM数据,通过分类统计和相关性分析,分析了影响西宁市土地利用结构的相关环境因素和社会因素,根据所得统计结果可知:西宁市自然环境因子对不同类型的土地产生的影响不同。林地和草地的变化程度随着海拔的升高呈增大的趋势,耕地和建设用地的变化率指数随着海拔增大逐渐减小,水域和其他土地基本保持平稳。根据社会经济数据的相关分析,西宁市土地利用格局的不断变化与社会经济发展息息相关,其中耕地变化情况和人口变化对土地利用格局的变化产生了重要的影响。

Land is the important material basis for human survival and development.Analysis on factors of effects of land use structure,including natural environment factors and socioeconomic factors,can provide the very important reference for more standardized and rational use of land.The experiment analyzes the environmental factors and social factors impacting the land use structure in Xi′ning City by using Landsat image data and DEM data in 2001 and 2014and methods of the classification statistics and correlation analysis.The results show that natural environment factors of Xi′ning City have different effects on different types of land.The degrees of changes in forestland and grassland gradually increased with the increase of elevation,the change rate indices of cultivated land and construction decreased,water and other land remained stable.The change of land use pattern in Xi′ning City is closely related to the socioeconomic development according to the analysis of socioeconomic data,among which change of cultivated land and population changes had the important influence on the change of land use pattern.