干旱区生态环境知识资源中心(Arid): Spectral analysis of seasonal rock and vegetation changes for detecting karst rocky desertification in southwest China

Arid

DOI	10.1016/j.jag.2021.102337
	Spectral analysis of seasonal rock and vegetation changes for detecting karst rocky desertification in southwest China
	Zhang, Jie; Liu, Meiling; Liu, Xiangnan; Luo, Weiqun; Wu, Ling; Zhu, Lihong
通讯作者	Liu, ML (corresponding author), China Univ Geosci, Sch Informat Engn, Beijing 100083, Peoples R China.
来源期刊	INTERNATIONAL JOURNAL OF APPLIED EARTH OBSERVATION AND GEOINFORMATION
ISSN	1569-8432
EISSN	1872-826X
出版年	2021
卷号	100
英文摘要	Karst rocky desertification (KRD) has become a major long-term problem for the ecological environment in karst areas of southwest China. The aim of this study was to monitor and evaluate the level of rocky desertification in Pingguo County, Guangxi Province, southwest China, by tracking the seasonal spectral changes in rock and vegetation cover. Landsat-8 Operational Land Imager (OLI) images and field measurements of karst areas were collected and a novel karst rocky desertification index (KRDI) was constructed as an indicator of rocky desertification based on greenness, humidity, and brightness. Then, the time-spectrum feature space (TSFS) model was used to determine the level of rocky desertification. The main findings were as follows. (1) KRDI is a good indicator of karst rocky desertification; the highest KRDI value was obtained for severe rocky desertification, followed by moderate rocky desertification, with slight rocky desertification exhibiting the lowest KRDI value. (2) KRDI values exhibited some differences in different seasons, with the lowest KRDI occurring in summer and the highest in winter. (3) The TSFS model can accurately monitor and identify different levels of rocky desertification. The selected key indicators performed well, with a Kappa coefficient of 0.90 and overall accuracy of 0.92. Therefore, the proposed index, combining spectral information with spatiotemporal information, is a promising method for extracting information on karst rocky desertification, with significant application potential for areas with similar geology.
英文关键词	Karst area Rocky desertification index Tasseled cap transformation Seasonal change Time-spectrum feature space model
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000645441600001
WOS类目	Remote Sensing
WOS研究方向	Remote Sensing
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/350569
作者单位	[Zhang, Jie; Liu, Meiling; Liu, Xiangnan; Wu, Ling; Zhu, Lihong] China Univ Geosci, Sch Informat Engn, Beijing 100083, Peoples R China; [Luo, Weiqun] Chinese Acad Geol Sci, Inst Karst Geol, Guilin 541004, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Jie,Liu, Meiling,Liu, Xiangnan,et al. Spectral analysis of seasonal rock and vegetation changes for detecting karst rocky desertification in southwest China[J],2021,100.
APA	Zhang, Jie,Liu, Meiling,Liu, Xiangnan,Luo, Weiqun,Wu, Ling,&Zhu, Lihong.(2021).Spectral analysis of seasonal rock and vegetation changes for detecting karst rocky desertification in southwest China.INTERNATIONAL JOURNAL OF APPLIED EARTH OBSERVATION AND GEOINFORMATION,100.
MLA	Zhang, Jie,et al."Spectral analysis of seasonal rock and vegetation changes for detecting karst rocky desertification in southwest China".INTERNATIONAL JOURNAL OF APPLIED EARTH OBSERVATION AND GEOINFORMATION 100(2021).