Estimating the spatial distribution of available biomass in grazing forests with a satellite image: A preliminary study
Estimating the spatial distribution of available biomass in grazing forests with a satellite image: A preliminary study
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利用卫星图像估算放牧林中可用生物量的空间分布：初步研究
DOI：
10.1111/j.1744-697x.2005.00015.x
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
S. Itano
中科院分区：
文献类型：
--
作者：
M. Tsutsumi;K. Kawamura;Midori Sugiyama;Shusuke Sato;Y. Deguchi;K. Sugawara;S. Sakanoue;S. Itano
我们测试了放牧森林的可用生物量是否可以通过分析卫星图像与现场数据来估计。我们的研究地点位于日本东北部，由不同造林年限的针叶林、多层针叶林和落叶阔叶林组成。利用前期研究中收集的森林有效生物量数据，对夏季Landsat TM影像进行分析，绘制森林有效生物量的空间分布图。有人建议，应分别对多层针叶林、其他针叶林和阔叶林进行分析。作为回归分析的结果之间的关系的可用生物量和几个参数，第一个主成分计算与陆地卫星TM的六个波段的反射率是最合适的参数来估计可用生物量。问题的答案“森林中可用生物量的空间分布可以用卫星图像来估计吗？”是的，在针叶林里我们提出了一个程序，描绘了一个精确的地图，在森林中的可用生物量的分布与分析的卫星图像。
We tested whether available biomass in grazing forests could be estimated by analyzing a satellite image with field data. Our study site was situated in north-eastern Japan and was composed of coniferous forest differing in afforested years, multilayered coniferous forest and deciduous broadleaf forest. The data of available biomass collected in previous studies was used to analyze a Landsat Thematic Mapper (TM) image acquired in summer and we tried to depict a map of the spatial distribution of available biomass in the forest. It was suggested that an analysis should be conducted separately in each of the multilayered coniferous, the other coniferous and broadleaf forests. As a result of regression analysis on the relationship between available biomass and each of several parameters, the first principal component computed with reflectance of the six bands of the Landsat TM was the most appropriate parameter to estimate available biomass. The answer to the question ‘Can the spatial distribution of available biomass in a forest be estimated with a satellite image?’ is ‘Yes, in coniferous forests’. We propose a procedure for depicting a precise map of the distribution of available biomass in a forest with analysis of a satellite image.