干旱区生态环境知识资源中心(Arid): 基于WorldView-2高分影像的胡杨林结构参数获取研究

Arid

	基于WorldView-2高分影像的胡杨林结构参数获取研究
其他题名	Structural parameter acquisition of Populus euphratica by WorldView-2 remote sensing image
	杨雪峰; 叶茂; 木尼热·买买提
来源期刊	干旱区研究
ISSN	1001-4675
出版年	2021
卷号	38 期号:6 页码:1659-1667
中文摘要	森林结构特征是评价森林生态系统的重要指标,如何使用遥感技术获取大尺度森林结构具有重要的科学研究意义。塔里木河下游作为我国干旱区生态保护的重点区域,该区域的胡杨林作为生态恢复的主要对象,研究其森林结构参数具有重要的现实意义。通过采用高分辨率WorldView-2遥感影像,结合无人机遥感技术,利用光谱混合理论与基于对象影像处理技术,获取位于塔里木河下游研究区的胡杨株数、冠幅、植被覆盖度和胡杨高度信息。通过与无人机观测数据在1 hm~2尺度上进行比较,使用高分影像获取的胡杨冠幅、树高、植被覆盖度和密度的R2分别为0.69、0.63、0.89和0.86,证明高分影像与无人机技术结合可以在区域尺度上获取较为准确的森林结构信息。最终对塔里木河下游研究区胡杨林结构信息估测得出:总株数约1.05*10~5株,每公顷平均树高7.38 m,平均冠幅为5.86 m,平均密度26株,平均覆盖度为7.8%。
英文摘要	Forest structure information is an important index to evaluate forest ecosystems and applying remote sensing technology to explore forest structure offers practical scientific applications. The lower reaches of the Tarim River are a key area of ecological protection in arid areas of China, in this paper, we applied WorldView-2 very high-resolution remote sensing imagery using spectral unmix analysis theory and object-based image analysis processing technology to examine tree density, crown diameter, and Fractional Vegetation Cover (FVC) of Populus euphratica in the study area. Using UAV photogrammetry, we also obtained height data of Populus euphratica by establishing a regression model between canopy reflectance, texture, and tree height. By comparing structural data with UAV, we found the following results based on a 1 hm~2 scale: R2 of Populus euphraticas crown diameter=0.69 and RMSE=0.69 m; R2 of Populus euphraticas height = 0.63 and RMSE= 0.57 m; R2 of Populus euphraticas FVC=0.89 and RMSE=2.8%; and R2 of Populus euphraticas density=0.86 and RMSE=9.64 trees·hm~(-2). We found forest structural information can be obtained using WorldView-2 very highresolution imagery with UAV technology support. We calculated 105000 trees Populus euphratica individuals and 2000 trees distributed per kilometer of the Tarim River, tree height of 55% of the study area at 6-8 m·hm~(-2), crown width of 49.52% at 6-8 m·hm~(-2), density of 51.8% lower than 20 trees·hm~(-2), and a FVC of 49.24% lower than 5% per hectare. The average height of the Populus euphratica forest was 7.38 m, the average density was 26 trees·hm~(-2), the average crown width was 5.86 m, and the average FVC was 7.8%. Tree height and crown width were slightly overestimated, while density and coverage were underestimated. As a representative river section in the lower reaches of the Tarim River, these data are useful for understanding the overall ecological status of Populus euphratica in the lower reaches of the Tarim River.
中文关键词	森林结构参数 ; 胡杨 ; 高分辨率遥感 ; 光谱混合分析 ; 面向对象影像分析
英文关键词	forest structural parameters Populus euphratica high spatial resolution remote sensing spectral mixture analysis object-oriented image analysis
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Forestry
CSCD记录号	CSCD:7095392
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/377679
作者单位	杨雪峰, 新疆师范大学地理科学与旅游学院;;新疆干旱区湖泊环境与资源实验室, ;;新疆干旱区湖泊环境与资源实验室, 乌鲁木齐;;乌鲁木齐, 新疆;;新疆 830054;;830054, 中国.; 叶茂, 新疆师范大学地理科学与旅游学院;;新疆干旱区湖泊环境与资源实验室, ;;新疆干旱区湖泊环境与资源实验室, 乌鲁木齐;;乌鲁木齐, 新疆;;新疆 830054;;830054, 中国.; 木尼热·买买提, 新疆师范大学地理科学与旅游学院;;新疆干旱区湖泊环境与资源实验室, ;;新疆干旱区湖泊环境与资源实验室, 乌鲁木齐;;乌鲁木齐, 新疆;;新疆 830054;;830054, 中国.
推荐引用方式 GB/T 7714	杨雪峰,叶茂,木尼热·买买提. 基于WorldView-2高分影像的胡杨林结构参数获取研究[J],2021,38(6):1659-1667.
APA	杨雪峰,叶茂,&木尼热·买买提.(2021).基于WorldView-2高分影像的胡杨林结构参数获取研究.干旱区研究,38(6),1659-1667.
MLA	杨雪峰,et al."基于WorldView-2高分影像的胡杨林结构参数获取研究".干旱区研究 38.6(2021):1659-1667.