以兰州市榆中县为例，采用主成分分析法，从外部驱动力和内部驱动力两方面对区域土地利用变化驱动力进行分析表明，榆中县土地资源利用变化主要驱动力为土地利用变化斑块距离公路、铁路、县城、乡镇中心的距离等区位因素和降水、植被盖度、坡度、高程等自然因素，即榆中县土地利用变化由外部驱动力和内部驱动力两方面共同决定。

Take Yuzhong county of Lanzhou city for example， using principal component analysis， from the external driving force and internal driving force to the regional land use change driving are analyzed， the result shows that the main driving force of land use change in Yuzhong county which land use change patch distance highway， railway， county， township center distance and other factors， such as precipitation， vegetation coverage， slope， elevation and other natural factors， that is Yuzhong county land use change decide jointly by external driving force and internal driving force.

F293.2

国土资源部公益项目(201211050-4)