高分辨率DEM在森林生产力估算中的应用

在广西宁明县以马尾松和桉树为例,对比分析野外实测与利用1∶10 000比例尺DEM推算的地形因子所建不同树种生产力模型的精度,探讨了高分辨率DEM在森林生产力估算中的作用.结果认为:①基于1∶10 000比例尺DEM推算的地形因子可代替实测数据进行森林生产力建模,其精度满足估算要求;②仅利用立地条件不能进行马尾松生产力建模,但却能建立桉树模型.对两树种而言,均是用树龄与立地条件共同建立的模型更优.

Application of High Resolution DEM on Forest Productivity Estimation

Taking Masson pine and Eucalypt as study examples,comparative analysis of Terrain factor surveyed or calculated by 1：10000 DEM was conducted,combined with tree age and soil factor,high resolution DEM was applied to build estimation model of different forest species＇ productivity,and the function of high resolution DEM in forest productivity estimation was discussed in this paper.The results showed that： ①Terrain factor surveyed can be replaced by high resolution DEM calculated to establish model,which will reduce labor cost and support for forest ecosystem and carbon cycle research.② It＇s reasonable and feasible to establish Eucalypt productivity model with landform condition factors,but can＇t only take these factors to build Masson pine productivity model,and both of the species＇ models established by tree age and landform condition are better.