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衛星リモートセンシングによる三宅島2000年噴火後の植生回復過程の評価

机译:卫星遥感对2000年宫岳岛喷发后植被恢复过程的评价

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摘要

The vegetation of Miyake Island has been widely effected by the volcanic eruption in July 2000. This phenomenon is still going on and much of the vegetation cover has been changed. It is quite important to monitor the vegetation recovery process because of ecosystem study, prevention of disaster and rehabilitation of the Island. This study investigated an evaluation of the vegetation recovery process in Miyakejima Island after the 2000 volcanic eruption using satellite remote sensing and field vegetation survey. Multi temporal 12 satellite images of Terra/ASTER and JERS-1/OPS were selected and combined into three time series datasets such as the before eruption, the after eruption within two years and the after eruption more than three years. These three time series image datasets were analyzed into the seamless images of the maximum NDVI value. According to the unsupervised classification of these three images, Miyakejima Island was divided into six classes with vegetation change patterns. These results followed past works and field vegetation survey well. The classes were recognized with the vegetation change which shows the damage of trees and the recovery of vegetation after the volcanic eruption of the year 2000.
机译:三宅岛的植被在2000年7月受到火山喷发的广泛影响。这种现象仍在继续,许多植被被改变了。由于生态系统研究,预防灾害和岛屿的恢复,监测植被的恢复过程非常重要。本研究使用卫星遥感和野外植被调查研究了对2000年火山爆发后三宅岛岛植被恢复过程的评估。选择了Terra / ASTER和JERS-1 / OPS的多时相12幅卫星图像,并将其组合成三个时间序列数据集,例如喷发前,两年内的喷发后以及三年以上的喷发后。将这三个时间序列图像数据集分析为最大NDVI值的无缝图像。根据这三个图像的无监督分类,三宅岛被分为具有植被变化模式的六类。这些结果很好地遵循了以往的工作和野外植被调查。这些类别通过植被变化来识别,该变化显示了2000年火山喷发后树木的损坏和植被的恢复。

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