干旱区生态环境知识资源中心(Arid): 基于综合分段优势的植被覆盖度模型比较

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	基于综合分段优势的植被覆盖度模型比较
其他题名	Comparison of vegetation coverage models based on comprehensive segmentation advantages
	边慧芹; 王雪梅
来源期刊	草业科学
ISSN	1001-0629
出版年	2021
卷号	38 期号:3 页码:1001-0629
中文摘要	基于Landsat 8 OLI遥感影像选取9种植被指数,与野外实测植被覆盖度进行相关性分析,采用分段方式选择敏感植被指数,构建回归模型及FCD模型(forest canopy density mapping model, FCD)对渭干河-库车河三角洲绿洲植被覆盖度进行反演。结果表明:1)根据实测数据计算不同植被指数在不同植被覆盖度范围内的变化比例,从而确定0.3和0.7作为研究区植被覆盖度的分段点;2)分段回归模型与综合分段优势的FCD模型建模精度均约为79%,但综合分段优势的FCD模型建模集R2较高,RMSE较小,其验证结果优于分段回归模型,验证集R2为0.832,RMSE为0.154,精度为82.018%。综合分段优势的FCD模型更适合用于研究区总体植被覆盖度反演,可为干旱区植被覆盖度定量监测与生态环境评价提供依据。
英文摘要	On the basis of Landsat 8 OLI remote sensing images, nine vegetation indices were selected to analyze the correlation between vegetation indices and field-measured vegetation coverage. A sensitive vegetation index was selected based on the segmentation method, and regression and FCD (forest canopy density mapping model) models were used to invert the vegetation coverage in the Weigan-Kuqa River delta oasis. The following results were obtained. 1) Using the measurement data, the change proportion of different vegetation indices in different vegetation coverage ranges was calculated, and 0.3 and 0.7 were determined as the segmentation points of vegetation coverage in the study area. 2) The modeling accuracy of the segmented regression and FCD segmentation models was approximately 79%; however, the R2 (0.832) and RMSE (0.154) values of the FCD segmentation model were higher and smaller, respectively, than those of the segmented regression model. Thus, the FCD segmentation model was established as providing better validation results (PRECISION of 82.018%). The FCD segmentation model is therefore considered more suitable for inversion of the total vegetation coverage in the study area, and will contribute to the quantitative monitoring of vegetation coverage and evaluation of the ecological environment in arid areas.
中文关键词	植被指数 ; 分段回归 ; FCD模型 ; 植被覆盖度反演 ; 渭干河-库车河三角洲绿洲
英文关键词	vegetation index segmentation regression forest canopy density mapping model vegetation coverage inversion the delta oasis of Weigan-Kuqa River
类型	Article
语种	中文
国家	中国
收录类别	CSCD
WOS类目	Plant Sciences
CSCD记录号	CSCD:6950910
来源机构	新疆师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/354171
作者单位	边慧芹, 新疆师范大学地理科学与旅游学院, 乌鲁木齐, 新疆 830054, 中国.; 王雪梅, 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重点实验室, ;;新疆干旱区湖泊环境与资源重点实验室, 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	边慧芹,王雪梅. 基于综合分段优势的植被覆盖度模型比较[J]. 新疆师范大学,2021,38(3):1001-0629.
APA	边慧芹,&王雪梅.(2021).基于综合分段优势的植被覆盖度模型比较.草业科学,38(3),1001-0629.
MLA	边慧芹,et al."基于综合分段优势的植被覆盖度模型比较".草业科学 38.3(2021):1001-0629.