Development of monitoring system for the Beech Natural Forests distribution using Landsat Imagery

以山毛榉天然林为研究对象，对卫星数据数与林分因子的关系进行了分析。山毛榉天然林多分布在山区。然后，校正后得到的非相关数字数与坡度的比例增大，校正后的数字数与坡度的比例不再增大，验证了校正的效果。另一方面，流苏概念的湿润度在各林分结构上的相关性最高，且与林冠闭合和林分体积的相关性显著。由于该冠状物与山毛榉天然林的结构属性密切相关，得到了一个关联公式，并根据公式对冠状物分为3个等级进行了估算。假定的冠状闭合几乎令人满意地与数字化航空照片显示的冠状闭合相反。冠度低的林分密度显著降低。因此，对未来管理所必需的低树冠闭合林分的指示，以及对监测山毛榉天然林的可能性，都是通过对低树冠闭合场址的指示作出的。

Analysis on relationships between the digital numbers of satellite data and factors for forest stands were performed with the object on the beech natural forest. The beech natura1 forest mostly is distributed in mountain areas. Then, bigger digital numbers were obtained in proportion to slopes for the non-correlation and no more increasing digital numbers were in proportion to slopes after the correction, and effects of corrections were verified. On the other hand, Wetness in Tasseled cap concept showed the highest correlation on each stand structure and significant correlations were shown on relationships with the crown closure and volume. Because this crown closure was deeply connected to structural attributes of the beech natural forest, a relational formula was obtained, and crown closures separated into 3 grades from the formula were estimated. The presumed crown closures were almost satisfactorily opposed to the crown closures shown by the digitized aerial photographs. Stands with low crown closures were extremely decreased their stand densities. Therefore, indications of stands with low crown closure necessary for future managements, and of possibilities for monitoring the beech natural forests were made by the indication of sites having low crown closures.