基于DEM的秦岭火地塘森林植被空间变异分析

Spatial Variation Analysis of Forest Vegetation at Huoditang in the Qinling Mountains Basd on “Digital Elevation Model”

DEM是GIS空间分析的基础，在林业生产及科研领域中开始得到广泛应用。以秦岭火地塘林场为研究对象，利用DEM对火地塘林场森林植被类型在不同地形因子上的分布规律进行统计和分析。结果表明，火地塘森林植被类型在垂直分布中具有明显的海拔梯度性，其中桦木明显处于高海拔地带；阳坡森林植被类型生长较好，部分植被在坡向上平均分布；所有森林植被平均分布于坡度为15°～35°之间，这一分布状况与火地塘地形有很大关系。

As a basis of geographic information system（GIS） ,digital elevation model （DEM） has been widely applied in the research and production of forestry. Taking Huoditang Forest Farm in the Qinling Mountains a research object,the distribution rules of forest vegetation in differant topographic factors were analyzed statistically. The results showed that the forest vegetation in the vertical distribution had the obvious elevation gradient, and the growth of forest vegetation was better in the sunny slopes, the partial vegetations had even distributions in different slope directions. All forest vegetations were distributed equally on the slopes between 15° and 35° .