基于激光雷达卫星(GEDI)的广东省森林冠层高度和生物量估算

doi:10.13474/j.cnki.11-2246.2023.0366

测绘通报 ›› 2023, Vol. 0 ›› Issue (12): 102-105.doi: 10.13474/j.cnki.11-2246.2023.0366

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基于激光雷达卫星(GEDI)的广东省森林冠层高度和生物量估算

吴贞江^1,2,3, 张佳华^3,4,5

1. 自然资源部城市国土资源监测与仿真重点实验室, 广东深圳 518034;
2. 中国科学院大学地球行星科学学院, 北京 100049;
3. 青岛大学计算机科学技术学院, 山东青岛 266071;
4. 海南省空天信息研究院, 海南三亚 572000;
5. 海南省地球观测重点实验室, 海南三亚 572000

收稿日期:2023-03-27 发布日期:2024-01-08
通讯作者: 张佳华。E-mail:zhangjh@radi.ac.cn
作者简介:吴贞江(1995-),男,博士生,主要从事植被遥感研究工作。E-mail:wuzhenjiangyj@163.com
基金资助:
自然资源部城市国土资源监测与仿真重点实验室开放基金(KF-2021-06-081);海南省重点研发计划(ZDYF2021SHFZ063);国家自然科学基金(42071425)

Forest canopy height and biomass estimation based on LiDAR satellite (GEDI) in Guangdong province

WU Zhenjiang^1,2,3, ZHANG Jiahua^3,4,5

1. Key Laboratory of Urban Land Resources Monitoring and Simulation, Ministry of Natural Resources, Shenzhen 518034, China;
2. College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing 100049, China;
3. College of Computer Science and Technology, Qingdao University, Qingdao 266071, China;
4. Key Laboratory of Earth Observation of Hainan Province, Sanya 572000, China;
5. Hainan Aerospace Information Research Institute, Sanya 572000, China

Received:2023-03-27 Published:2024-01-08

摘要/Abstract

摘要： 森林冠层高度和生物量估算对估算森林碳收支方面起到重要作用。本文以广东省森林为研究对象,以全球生态系统动态调查(GEDI)激光雷达卫星为数据源,分别采用回归树和克里金插值算法,对广东省的森林冠层高度和生物量进行反演。研究结果表明,广东省的树木高度普遍在10～20 m,占比超过50%。树高高值出现在粤北的韶关、肇庆等市,树高普遍在15～20 m;而湛江市的平均树高最低,普遍不足10 m。广东省森林生物量最大值为335.85 t/hm²,最小值为5.25 t/hm²,平均值为98.27 t/hm²。森林生物量高值区域主要分布在粤东山区和粤西山区,而广东省平原和城市化地区森林生物量则较低。本文结果为估算广东省森林生态系统碳吸收提供科学依据。

关键词: 激光雷达卫星, 广东省, 森林冠层高度, 生物量, 估算方法

Abstract: Forest canopy height and biomass estimation play an important role in estimating forest carbon expenditure. In this study, the forest canopy height and biomass in Guangdong province use the global ecosystem dynamics survey (GEDI) LiDAR satellite as the data source, regression tree and Kerry kin interpolation algorithm, respectively. The results show that the height of trees in Guangdong province is generally between 10 and 20 m, accounting for more than 50%. The tree height high value occurs in Shaoguan, Zhaoqing and other cities in northern Guangdong province, and the tree height is generally 15~20 m, while the average tree height in Zhanjiang city is the lowest, generally less than 10 m. The maximum forest biomass in Guangdong province is 335.85 t/hm², the minimum value is 5.25 t/hm², and the average value is 98.27 t/hm².The areas with high value of forest biomass are mainly distributed in the eastern and western Guangdong province, while the forest biomass is lower in the plain and urbanized areas of Guangdong province. The results provide a scientific basis for estimating carbon absorption of forest ecosystem in Guangdong province.

Key words: LiDAR satellite, Guangdong province, forest canopy height, biomass, estimation approach

中图分类号:

P237

吴贞江, 张佳华. 基于激光雷达卫星(GEDI)的广东省森林冠层高度和生物量估算[J]. 测绘通报, 2023, 0(12): 102-105.

WU Zhenjiang, ZHANG Jiahua. Forest canopy height and biomass estimation based on LiDAR satellite (GEDI) in Guangdong province[J]. Bulletin of Surveying and Mapping, 2023, 0(12): 102-105.

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基于激光雷达卫星(GEDI)的广东省森林冠层高度和生物量估算

Forest canopy height and biomass estimation based on LiDAR satellite (GEDI) in Guangdong province

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