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Estimating canopy fuel load with hemispherical photographs: A rapid method for opportunistic fuel documentation with smartphones
Methods in Ecology and Evolution ( IF 6.6 ) Pub Date : 2021-08-21 , DOI: 10.1111/2041-210x.13708
H.A. Cameron 1 , G.M. Díaz 2 , J.L. Beverly 1
Affiliation  

  1. Canopy fuel load (CFL) affects wildfire intensity and is a critical input for fire behaviour models; however, measuring CFL in the field is time-consuming and costly.
  2. Until recently, hemispherical photographs have been unable to adequately describe canopy metrics in non-diffuse light conditions. Recent developments allow calculation of canopy openness (CO) and leaf area index (LAI) using hemispherical photographs taken in sunny conditions.
  3. We describe an inexpensive and effective method for estimating CFL in the field opportunistically using CO and LAI values derived from hemispherical photographs taken in variable lighting conditions with a smartphone and fisheye lens attachment.
  4. Implications of this work include: new data for modelling effects of forest structure on fire behaviour; inexpensive assessment and monitoring of forest structure changes over time and in relation to management actions; and decision support for fuel treatment planning and prescribed burning operations.


中文翻译:

用半球照片估计冠层燃料负荷:一种使用智能手机进行机会燃料记录的快速方法

  1. 冠层燃料负荷 (CFL) 影响野火强度,是火灾行为模型的关键输入;然而,在现场测量 CFL 既费时又费钱。
  2. 直到最近,半球形照片还无法充分描述非漫射光条件下的冠层度量。最近的发展允许使用在晴朗条件下拍摄的半球照片计算冠层开度 (CO) 和叶面积指数 (LAI)。
  3. 我们描述了一种廉价且有效的方法,用于机会性地使用 CO 和 LAI 值在现场估计 CFL,这些值来自在可变照明条件下使用智能手机和鱼眼镜头附件拍摄的半球照片。
  4. 这项工作的意义包括: 用于模拟森林结构对火灾行为影响的新数据;随着时间的推移和与管理行动相关的森林结构变化的低成本评估和监测;为燃料处理规划和规定的燃烧操作提供决策支持。
更新日期:2021-08-21
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