DOI: 10.1016/j.jag.2013.11.002
Scopus记录号: 2-s2.0-84897449429
论文题名: Spatiotemporal analysis of vegetation index after typhoons in the mountainous watershed
作者: Chu H ; -J
刊名: International Journal of Applied Earth Observation and Geoinformation
ISSN: 15698432
出版年: 2014
卷: 28, 期: 1 起始页码: 20
结束页码: 27
语种: 英语
英文关键词: Empirical orthogonal functions
; Land cover change
; NDVI
; Remotely sensed images
; Typhoon
; Variograms
Scopus关键词: empirical analysis
; land cover
; NDVI
; remote sensing
; satellite imagery
; spatiotemporal analysis
; typhoon
; variogram
; watershed
; Taiwan
英文摘要: An extensive land cover change was triggered by a series of typhoons, especially Typhoon Morakot in 2009 in Taiwan. The normalized difference vegetation index (NDVI) series from multiple satellite images were applied to monitor the change processes of land cover. This study applied spatiotemporal analysis tools, including empirical orthogonal functions (EOF), and multiple variograms in analyzing space-time NDVI data, and detected the effects of large chronological disturbances in the characteristics of land cover changes. Spatiotemporal analysis delineated the temporal patterns and spatial variability of NDVI caused by these large typhoons. Results showed that mean of NDVI decreased but spatial variablity of NDVI increased after typhoons in the study area. The EOF can clarify the major component of NDVI variations and identify the core area of the NDVI changes. Various approaches showed consistent results that Typhoon Morakot significantly lowered the NDVI in land cover change process. Furthermore, the spatiotemporal analysis is an effective monitoring tool, which advocates the use of the index for the quantification of land cover change and resilience. © 2013 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/79641
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Geomatics, National Cheng Kung University, No. 1, University Road, Tainan City 701, Taiwan
Recommended Citation:
Chu H,-J. Spatiotemporal analysis of vegetation index after typhoons in the mountainous watershed[J]. International Journal of Applied Earth Observation and Geoinformation,2014-01-01,28(1)