数字地形特征对土地利用空间分布的定量影响

 为了获取地形对土地利用空间分布的定量影响，以山西省为研究区，基于数字高程模型（DEM）数据生成4种地形因子（海拔高度、起伏度、坡度和坡向）表征数字地形特征，并通过遥感影像解译获得土地利用空间分布，利用地理探测器方法定量分析地形因子对土地利用空间分布的分异性、相关性及其交互作用的定量影响。研究结果表明：起伏度与坡度的空间分异性最显著（显著性水平p<0.01）；起伏度空间相关性最强（空间统计量q=0.012），其次为坡度（q=0.010）；任意两种地形因子交互均具有非线性增强作用，其中海拔高度与起伏度的交互作用最强（q=0.034）。因此，起伏度是影响土地利用空间分布最重要的单个地形因子，它和海拔高度一起对土地利用空间分布发挥重要作用。

Quantitative effects of digital terrain features on land use spatial distribution

To evaluate the quantitative effect of the topographic conditions on the spatial distribution of land use, the Shanxi Province is taken as the research area， to study four topographic factors (the elevation, the relief, the slope and the aspect) obtained from the DEM dataset, representing the digital topographic characteristics, and the spatial distribution of the land use is interpreted based on the remote sensing images, finally to analyze the spatial stratified heterogeneity, the spatial correlation and the interaction effect of the four digital topographic factors on the spatial distribution of the land use. It is shown that: (1) the relief and slope factors have the most remarkable spatial stratified heterogeneity effect (p<0.01); (2) the relief factor has the strongest spatial correlation effect (q=0.012), followed by the slope (q=0.010); (3) any two kinds of digital terrain indicators have a significant interaction enhancement; the interaction between the altitude and the relief has the strongest effect with the highest statistic value q of 0.034. Hence, the relief factor is the most important single factor affecting the spatial distribution of the land use, which plays an important role in the spatial distribution of the land use by combining the elevation factor.