FOREST RESOURCES WANAGEMENT ›› 2023, Vol. 0 ›› Issue (3): 90-97.doi: 10.13466/j.cnki.lyzygl.2023.03.012
• Scientific Research • Previous Articles Next Articles
ZHOU Mei1(), LI Chungan2(), YANG Chengling3, LI Zhen3
Received:
2023-04-28
Revised:
2023-05-19
Online:
2023-06-28
Published:
2023-08-09
CLC Number:
ZHOU Mei, LI Chungan, YANG Chengling, LI Zhen. Experiments on Estimating Planted Forest Inventory Attributes Based on UAV-LiDAR Data[J]. FOREST RESOURCES WANAGEMENT, 2023, 0(3): 90-97.
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URL: http://www.lyzygl.com.cn/EN/10.13466/j.cnki.lyzygl.2023.03.012
Tab.2
List of UAV-LiDAR-derived metrics used for establishing the predictive models
变量 | 含义 | 冠层三维结构的刻画角度 | 变量组 |
---|---|---|---|
hp95 | 95%分位数高度 | 冠层高度 | 高度变量 |
Hmean | 点云平均高 | 冠层高度 | 高度变量 |
Hstd | 点云高度的标准差 | 冠层高度 | 高度变量 |
Hcv | 点云高度的变动系数 | 冠层高度 | 高度变量 |
CC | 郁闭度(修正) | 冠层密度 | 密度变量 |
dp50 | 50%分位数密度 | 冠层密度 | 密度变量 |
dp75 | 75%分位数密度 | 冠层密度 | 密度变量 |
LADmean | 叶面积密度均值 | 垂直结构异质性 | 垂直结构变量 |
LADstd | 叶面积密度标准差 | 垂直结构异质性 | 垂直结构变量 |
LADcv | 叶面积密度变动系数 | 垂直结构异质性 | 垂直结构变量 |
VFPmean | 枝叶垂直剖面均值 | 垂直结构异质性 | 垂直结构变量 |
VFPstd | 枝叶垂直剖面标准差 | 垂直结构异质性 | 垂直结构变量 |
VFPcv | 枝叶垂直剖面变动系数 | 垂直结构异质性 | 垂直结构变量 |
Tab.3
The best model formulation for estimating forest inventory attributes
森林类型 | 森林参数 | 模型式 |
---|---|---|
松树林 | 蓄积量(VOL)/m3 | VOLPine=a0Hmeana1CCa2VFPstda3Hstda4dp75a5 |
断面积(BA)/m2 | BAPine=a0Hmeana1CCa2VFPstda3Hcva4dp50a5 | |
平均高(H)/m | HPine=a0hp60a1hp70a2hp80a3CCa4dp50a5 | |
桉树林 | 蓄积量(VOL)/m3 | VOLEucalyptus=a0hp95a1CCa2VFPstda3Hcva4dp75a5 |
断面积(BA)/m2 | BAEucalyptus=a0hp95a1CCa2VFPstda3Hstda4dp75a5 | |
平均高(H)/m | HEucalyptus=a0hp60a1hp80a2 |
Tab.4
Model parameters and their good-of-fit and validation statistics
森林 类型 | 森林 参数 | 样地 数量 | 模型参数估计值 | 修正因子 (CF) | 拟合指标 | 检验指标 | |||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
a0 | a1 | a2 | a3 | a4 | a5 | R2 | rRMSE/ % | MPE/ % | R2 | rRMSE/ % | MPE/ % | ||||||||||||||
松树林 | VOL | 33 | 0.172 70 | 1.474 9 | 1.329 4 | -0.163 6 | -0.263 800 | -1.381 2 | 1.009 8 | 0.783 | 12.44 | 4.69 | 0.708 | 13.86 | 5.36 | ||||||||||
BA | 33 | 0.694 70 | 0.701 1 | 0.887 0 | -0.204 4 | -0.365 000 | -0.981 7 | 1.008 4 | 0.676 | 11.94 | 4.51 | 0.616 | 14.26 | 5.04 | |||||||||||
H | 33 | -0.080 12 | -5.177 1 | 8.299 5 | -2.391 0 | 1.136 600 | -1.012 3 | 1.007 0 | 0.846 | 10.30 | 3.88 | 0.794 | 11.06 | 4.15 | |||||||||||
桉树林 | VOL | 35 | -0.288 50 | 1.837 9 | 0.661 7 | 0.211 3 | -0.002 804 | 0.144 5 | 1.018 4 | 0.943 | 15.71 | 5.82 | 0.853 | 17.79 | 6.22 | ||||||||||
BA | 35 | -0.453 30 | 1.252 4 | 0.592 9 | 0.132 7 | -0.054 760 | 0.161 8 | 1.019 1 | 0.903 | 15.91 | 5.89 | 0.844 | 16.72 | 6.72 | |||||||||||
H | 35 | 0.055 13 | -2.560 6 | 3.471 9 | 1.005 9 | 0.899 | 9.87 | 3.59 | 0.833 | 10.85 | 3.81 |
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