干旱区生态环境知识资源中心(Arid): 应用地基激光雷达数据估算塔里木河下游胡杨叶面积指数

Arid

	应用地基激光雷达数据估算塔里木河下游胡杨叶面积指数
其他题名	Estimating the Leaf Area Index of Populus euphratica in the Lower Reaches of Tarim River with Terrestrial Laser Scanning
	巴比尔江·迪力夏提; 玉米提·哈力克; 艾萨迪拉·玉苏甫; 魏建新
来源期刊	东北林业大学学报
ISSN	1000-5382
出版年	2020
卷号	48 期号:11 页码:46-50
中文摘要	以塔里木河下游天然胡杨林为研究对象,应用地基激光雷达扫描胡杨三维点云数据,估算胡杨叶面积指数(LAI) 。按照距离河道的远近选取5个监测样地,各样地选取5棵孤立木进行地基激光雷达扫描,利用冠层高度模型(CHM)和凸包算法获取树高、树冠投影面积,采用冠层分析法(VCP)建立胡杨三维体素模型,根据冠层结构估算单棵树叶面积指数,实测值进行拟合验证,并分析叶面积指数与树高、胸径、河道距离、地下水埋深等参数间的相关性。结果表明: VCP模型所得叶面积指数值与实测数据具有显著相关性(R~2 = 0.959,P<0.01),且估算胡杨叶面积指数精度较高;胡杨叶面积指数与树高、胸径、不同河道距离相关性不显著;但叶面积指数与地下水埋藏深度相关性显著(R~2 = 0.923,P<0.01) 。因此,运用地基激光雷达技术和VCP模型估测胡杨叶面积指数,可效为荒漠河岸林光合、蒸腾作用以及生物量、碳储量估算等研究提供技术支撑。
英文摘要	We obtained the leaf area index (LAI) of Populus euphratica natural forest in lower reaches of the Tarim River with 3D points cloud data scanned by Terrestrial Laser Scanner (TLS). Five monitoring plots were selected according to the distance from the river. Five individual trees were scanned in each plot. The Canopy Height Model (CHM) and Convex Hull algorithm were used to obtain the tree height and the projection area of the canopy. The Voxel-based canopy profiling (VCP) method was used to establish the three-dimensional voxel model of P. euphratica. Extraction of canopy structure and inversion of single tree,correlation between LAI and tree height,diameter at breast height (DBH),channel distance, ground water level and other parameters were analyzed by fitting with measured values. The LAI values fitted with tree height,DBH,distance from river channel and groundwater level,respectively. The results showed that the correlation between the LAI of VCP model and measured data was highly significant (R~2 = 0.959,P<0.01),and the accuracy of inverting P. euphratica LAI is high. P. euphratica had no significant correlation with the tree height,DBH and different river distance. However,there was a significant negative correlation between LAI and groundwater depth (R~2 = 0.923,P<0.01). Therefore, the use of TLS technology and VCP model to estimate P. euphratica LAI can provide a technical support for future research on photosynthesis and transpiration measurements,biomass and carbon storage estimation in desert riparian forests.
中文关键词	塔里木河下游 ; 胡杨 ; 地基激光雷达 ; 叶面积指数
英文关键词	The lower reaches of Tarim River Populus euphratica Terrestrial laser scanning Leaf area index
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Forestry
CSCD记录号	CSCD:6858533
来源机构	新疆大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/353423
作者单位	巴比尔江·迪力夏提, 新疆大学, 绿洲生态教育部重点实验室, 乌鲁木齐, 新疆 830046, 中国. 玉米提·哈力克, 新疆大学, 绿洲生态教育部重点实验室, 乌鲁木齐, 新疆 830046, 中国. 艾萨迪拉·玉苏甫, 新疆大学, 绿洲生态教育部重点实验室, 乌鲁木齐, 新疆 830046, 中国. 魏建新, 新疆维吾尔自治区自然资源信息中心, 新疆激光雷达应用工程技术研究中心.
推荐引用方式 GB/T 7714	巴比尔江·迪力夏提,玉米提·哈力克,艾萨迪拉·玉苏甫,等. 应用地基激光雷达数据估算塔里木河下游胡杨叶面积指数[J]. 新疆大学,2020,48(11):46-50.
APA	巴比尔江·迪力夏提,玉米提·哈力克,艾萨迪拉·玉苏甫,&魏建新.(2020).应用地基激光雷达数据估算塔里木河下游胡杨叶面积指数.东北林业大学学报,48(11),46-50.
MLA	巴比尔江·迪力夏提,et al."应用地基激光雷达数据估算塔里木河下游胡杨叶面积指数".东北林业大学学报 48.11(2020):46-50.