埃塞俄比亚北部干旱的阿夫罗蒙坦森林中无人机图像的树木高度估计及其对地上生物量估计的敏感性

IF 0.3 Q4 MULTIDISCIPLINARY SCIENCES Momona Ethiopian Journal of Science Pub Date : 2022-04-11 DOI:10.4314/mejs.v13i2.5
Tigistu Hadush, Atkilt Girma, A. Zenebe
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引用次数: 2

摘要

树高是计算地上森林生物量的一个有用参数,传统上主要是通过地面测量来测量。另一方面,通过野外调查测量林木高度和估算生物量是一项费时费力的工作。为了估算森林的固碳潜力,在不破坏森林的情况下利用遥感进行森林地上生物量估算具有重要意义。无人飞行器(UAV)是一项令人振奋的技术,它可以帮助估计树木高度,并且正在快速发展。此外,评估估算树高与实测树高之间的关系是未来将估算树高应用于AGB估算的必要条件。然而,基于无人机摄影测量影像的非洲山地干旱林树木高度估计及其对AGB估计的敏感性尚未得到研究。因此,本研究旨在评估从摄影测量无人机图像估计树高的准确性以及估计树高对AGB估计的敏感性。在埃塞俄比亚北部的Desa 'a干旱非洲山区森林采集了无人机摄影测量图像和地面测量的样本树木高度。从摄影测量无人机获取的图像估计树木高度,并与地面测量的树木高度进行比较。此外,还研究了估计树高对AGB估计的敏感性。估计的树高解释了89%的实地测量树高。树高估计值与实测值之间的较大差异对AGB估计的影响不显著。因此,在旱地非洲山地森林中,应用无人机航拍影像进行树高估算,对估算AGB具有广阔的应用前景。
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Tree Height Estimation from Unmanned Aerial Vehicle Imagery and Its Sensitivity on Above Ground Biomass Estimation in Dry Afromontane Forest, Northern Ethiopia
Tree height is a parameter useful for calculating above-ground forest biomass and is mostly measured traditionally by ground survey. On the other hand, measuring the forest tree height and biomass estimation through field survey is labor-intensive and time-consuming. The application of remote sensing for forest above-ground biomass (AGB) estimation without forest destruction is important in order to estimate the carbon sequestration potential of the forest. The unmanned aerial vehicle (UAV) is an elating technology, which can help to estimate tree height and it is evolving at a rapid speed. Moreover, assessing the relationship between estimated and measured tree height is necessary for the future application of estimated tree height on AGB estimation. However, tree height estimation from photogrammetric UAV imagery in the dry Afromontane Forest and its sensitivity to AGB estimation are not investigated. Thus, this study aimed to assess the accuracy of tree height estimated from photogrammetric UAV imagery and the sensitivity of the estimated tree height on AGB estimation. Photogrammetric UAV acquired images and sample trees height measured on the ground were collected in Desa’a dry Afromontane Forest, Northern Ethiopia. Tree height was estimated from photogrammetric UAV acquired images and compared with tree heights measured on the ground. Moreover, the sensitivity of the estimated tree height on AGB estimation was investigated. The estimated tree height explained 89% of the tree height measured in the field. A considerable difference between estimated and measured tree height has an insignificant effect on AGB estimation. Thus, in the dry land Afromontane Forest the application of UAV aerial imagery for tree height estimation is promising to estimate AGB.    
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来源期刊
Momona Ethiopian Journal of Science
Momona Ethiopian Journal of Science MULTIDISCIPLINARY SCIENCES-
自引率
0.00%
发文量
13
审稿时长
12 weeks
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