限制开发生态区土地利用变化驱动力分析——以宁夏西吉县为例

Driving forces of land-use changes in exploration limited ecological zones——Xiji county,Ningxia

以西吉县为例,选取2000年、2005年、2010年和2015年四期的Landsat TM遥感影像数据及统计年鉴数据,借助遥感和GIS技术,从土地利用信息熵、土地利用动态度和土地利用转移矩阵三方面探究土地利用变化特征,并在此基础上采用主成分分析方法,从自然因素、社会经济因素和政策法规三方面进行驱动机制分析。结果表明:研究期间,西吉县土地利用以耕地、林地、草地为主,耕地逐年减少,主要转化为林地和草地,建设用地变化速度最快,主要由耕地和未利用地转化而来;自然因素、社会经济因素和政策法规是影响西吉县土地利用变化的主要驱动力,其中社会经济因素主要是经济发展、人口增加和农业结构的调整。

To better understand the characteristics of land use change and the driving force in exploitation restricted ecological zones,taking Xiji county for example,remote sensing image data and the statistical yearbook data of the year 2000,2005,2010 and 2015 were used,and the remote sensing and GIS technology were applied to explore the characteristics of land use change from three aspects: moisture of land use information,land use dynamic index and land use transfer matrix.On this basis,principal component analysis method was applied to analyze driving mechanism from three aspects of natural factors,social economic factors and policies.The results show that,during the study period,the land uses of Xiji country were mainly cultivated land,woodland and grassland,and the cultivated land was reducing year by year,it mainly changed into woodland and grassland;construction land changed the fastest,and it was mainly transformed from cultivated land and the unused land.The key driving forces that influenced the land use change of Xiji county was natural factors,social economic factors and policies;the social economic factors mainly included the economic development,population increase and the adjustment of agricultural structure.