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首页> 外文期刊>Journal of Forest Planning >The Estimation of Wind Risk in Forests Stands using Airborne Laser Scanning (ALS)
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The Estimation of Wind Risk in Forests Stands using Airborne Laser Scanning (ALS)

机译：使用机载激光扫描（ALS）估算林分中的风灾风险

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Wind is the most important abiotic hazard for forestry in Britain. Most forests have been established in upland areas in locations that are commonly affected by high winds and poor soil conditions. Strong winds cause significant loss of timber every year in Great Britain and have profound effects in wood quality though increases in the proportion of compressed wood, poor stem straightness, repeated loss of leaders and important alterations in the relationship between height and diameter. ForestGALES(Geographical Analysis of the Losses and Effects of Storms in Forestry) is a process-based model that provides a better understanding of the variability in the wind forest climatology, an estimation of the critical wind speed to cause wind damage and thereturn period for that damage to occur. At present, ForestGALES is currently being linked to ArcGIS and LiDAR data has been evaluated to estimate the effects of stand structure in the probability of wind damage. To do so, the model has been adapted to operate with tree lists generated by LiDAR. In this context, three canopy delineation algorithms have been tested in connection to existing allometric relationships.TreeVAW (PctPESCU, 2006), TreesVIS (WEINACKER et al., 2004) and ITC (GouGEON, 2005). The results provided a valid method for evaluating the effects of stand variability on wind damage and the effectiveness of Airborne Laser Scanning for monitoring forest structure and its effects on wind stability.
机译：风是英国林业最重要的非生物危害。大多数森林都建立在高风和土壤条件差的高地地区。大风每年在英国造成大量木材损失，并且对木材质量产生深远影响，尽管压缩木材的比例增加，茎平直度差，前导杆反复丢失以及高度和直径之间的关系发生重大变化。 ForestGALES（林业中风暴损失和影响的地理分析）是一个基于过程的模型，可以更好地了解风林气候的变化性，估算造成风害的临界风速，并据此估算其发生周期发生损坏。目前，ForestGALES目前正与ArcGIS链接，并且已经对LiDAR数据进行了评估，以评估林分结构对风害发生概率的影响。为此，已将模型修改为可与LiDAR生成的树列表一起使用。在这种情况下，已经针对现有的异形关系测试了三种树冠轮廓描绘算法：TreeVAW（PctPESCU，2006），TreesVIS（WEINACKER等，2004）和ITC（GouGEON，2005）。结果为评估林分变异性对风害的影响以及机载激光扫描监测森林结构及其对风稳定性的影响提供了有效的方法。

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