摘要
以1983年、2004年林相图和森林经理调查小班数据库为基础,借助于地理信息系统技术,研究两期森林资源变化情况及不同时期森林类型空间分布上的变化特征。通过对地形图矢量化并获取该区域的数字高程模型(DEM),完成森林资源和DEM的叠加,进而研究森林资源结构变化和现状。研究结果表明:研究区域总面积减少了216hm2;疏林地面积、新造人工林面积、无立木林地面积、农耕地面积、重沼泽地面积减少,有林地、河流湖泊和居民道路用地增加;森林资源的结构不太合理,中龄林和近熟林面积占据较大比例,中龄林和近熟林的蓄积量有所增加,成过熟林的蓄积明显减少;通过数字高程模型(DEM)和森林资源结构的叠置,研究森林资源的空间分布规律,调整并恢复林场合理森林结构,实现森林资源的永续利用。
An experiment was conducted to study the change of forest resources in Maoershan Experimental Forest Farm between two periods by means of the forest map of 1983 and forest inventory database of subcompartments in 2004, with the support of geographical information system （GIS）. The change features of forest types in spatial distribution at different periods were analysed. The topographic maps were vectored and the digital elevation model （DEM） was obtained. The structure change and present status of forest resources were studied by overlaying the forest resources with DEM. Result showed that the total area of the study area reduced 216 hm^2 , and the areas of open forest lands, newly planted man-made forests, non-standing forests, croplands and wetlands decreased, while the areas of forest lands, water fields, village lands and reads increased. The structure of forest resources was unreasonable： the proportions of immature and near-mature forests were larger; the stand volume of immature and near-mature forests increased; the stand volume of mature forests decreased greatly.
出处
《东北林业大学学报》
CAS
CSCD
北大核心
2006年第5期32-34,共3页
Journal of Northeast Forestry University
关键词
森林资源
变化
数字高程模型
叠置分析
Forest resources
Change
Digital elevation model （DEM）
Overlay analysis
