Carbon Sequestration Estimation of Roadside Trees Based on Vehicle-borne Laser Point Cloud

doi:10.13466/j.cnki.lyzygl.2017.02.022

Abstract

Abstract:

Continuous development of urban road traffic system requires higher standards of road ecological environment. Ecological benefits of roadside trees are getting more attention. Carbon sequestration is a measurement of roadside trees’ ecological benefits. The traditional method of estimating carbon sequestration is costly and inefficient. In order to solve above problems,a method using vehicle-borne laser point cloud data to estimate the carbon sequestration of roadside trees is proposed in this paper. The method can calculate the geometric parameters of a roadside tree,including tree height,crown diameter,diameter at breast height,by processing and analyzing point cloud data of an individual tree. Combining the calculated geometric parameters and an appropriate carbon sequestration calculation model,the estimated single tree’s carbon sequestration can be calculated. The proposed method can help enlarge application range of vehicle-borne laser point cloud data,improve the efficiency of estimating carbon sequestration,construct urban ecological environment and manage landscape.

Key words: vehicle-borne laser point cloud, roadside trees, geometric parameters, carbon sequestration

CLC Number:

P237
TN249

ZHAO Yingyi, HU Qingwu. Carbon Sequestration Estimation of Roadside Trees Based on Vehicle-borne Laser Point Cloud[J]. FOREST RESOURCES WANAGEMENT, 2017, (2): 131-138.

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树高	槐树编号				树高	樟树编号
树高	1	2	3	4	树高	1	2	3	4
实测树高	5.46	5.45	5.20	5.30	实测树高	4.64	4.12	5.56	4.47
计算树高	5.53	5.54	5.11	5.13	计算树高	4.58	4.06	5.47	4.43
差值	-0.07	-0.09	0.09	0.17	差值	0.06	0.06	0.09	0.04
中误差				0.11	中误差				0.02

冠幅		槐树编号				冠幅		樟树编号
冠幅		1	2	3	4	冠幅		1	2	3	4
X方向冠幅	实测	1.97	0.92	1.34	1.53	X方向冠幅	实测	1.28	1.19	1.96	1.02
	计算	1.83	0.87	1.26	1.25		计算	1.31	1.20	2.08	1.08
	差值	0.14	0.05	0.08	0.28		差值	-0.03	-0.01	-0.12	-0.06
	中误差				0.09		中误差				0.04
Y方向冠幅	实测	2.01	1.59	1.68	2.00	Y方向冠幅	实测	1.43	1.27	2.30	1.17
	计算	2.06	1.52	1.56	1.93		计算	1.45	1.21	2.22	1.11
	差值	-0.05	0.07	0.12	0.07		差值	-0.02	0.06	0.08	0.06
	中误差				0.06		中误差				0.04
平均冠幅	实测	1.99	1.26	1.51	1.77	平均冠幅	实测	1.36	1.23	2.13	1.10
	计算	1.79	1.38	1.93	1.86		计算	1.42	1.09	1.91	1.04
	差值	0.20	-0.12	-0.42	-0.09		差值	-0.06	0.14	0.22	0.06
	中误差				0.22		中误差				0.10

胸径	槐树编号				胸径	樟树编号
胸径	1	2	3	4	胸径	1	2	3	4
实测胸径	14.0	12.4	13.9	11.4	实测胸径	21.5	22.8	28.6	21.0
计算胸径	14.5	13.6	14.1	11.1	计算胸径	21.6	23.0	29.5	20.5
差值	-0.5	-1.2	-0.2	0.3	差值	-0.1	-0.2	-0.9	0.5
中误差				0.5	中误差				0.5

计算量	槐树编号				计算量	樟树编号
计算量	1	2	3	4	计算量	1	2	3	4
材积量/m³	0.0450	0.0402	0.0395	0.0254	材积量/m³	0.0802	0.0805	0.1737	0.0710
生物量/t	0.0688	0.0614	0.0603	0.0388	生物量/t	0.1017	0.1021	0.2202	0.0901
固碳量/t	0.0340	0.0303	0.0298	0.0191	固碳量/t	0.0502	0.0504	0.1087	0.0445

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