Arid
DOI10.1080/01431160310001618761
Vegetation cover seasonal changes assessment from TM imagery in a semi-arid landscape
Camacho-De Coca, F; Garcia-Haro, FJ; Gilabert, MA; Melia, J
通讯作者Camacho-De Coca, F
来源期刊INTERNATIONAL JOURNAL OF REMOTE SENSING
ISSN0143-1161
EISSN1366-5901
出版年2004
卷号25期号:17页码:3451-3476
英文摘要

This work evaluates the suitability of spectral mixture analysis (SMA) methods to assess vegetation cover seasonal changes in a desertification context. Our main interest is to produce remotely sensed derived maps, sensitive to vegetation activity and quite independent of the soil background. A further aim is to analyse the inter-annual variations of this magnitude for different natural vegetation species, in response to seasonal and climatic changes. Fractional vegetation cover (FVC) was obtained using a Variable Endmember Spectral Mixture Analysis (VESMA) technique. The aim is to identify the main vegetation cover and lithological units and decompose them in separate stages. The use of specific spectral signatures for each pixel allows for a better adaptation of the endmembers to local conditions, which is an important prerequisite to ensure the accuracy of fractions. The method has been tested on a well documented area, the Guadalentin river basin, located in south-eastern Spain. Unlike pine forest and stipa classes, rosmarinus, sparse shrubs and seasonal grasses classes displayed larger inter-annual variability, showing higher stress in response to water availability. A comparative analysis between FVC and the Normalized Difference Vegetation Index (NDVI) was also conducted. Average values were used as indicators of the dynamics of the vegetation cover, with the variance of each vegetation class giving similar results. The correlation between both magnitudes varied from 55% for the class with least coverage to 90% for the densest vegetation class. Regarding seasonal evolution, the average values and standard deviations of the changes in each vegetation class in specific periods were related to seasonal changes and the effects of the rainfall pattern. Significant differences were found between the two methods, with FVC showing a higher coherence.


类型Article
语种英语
国家Spain
收录类别SCI-E
WOS记录号WOS:000222519500009
WOS关键词THEMATIC MAPPER DATA ; LEAF-AREA INDEX ; HETEROGENEOUS CANOPIES ; MULTISPECTRAL IMAGES ; SPECTRAL RESPONSE ; GREEN VEGETATION ; AVIRIS DATA ; MODELS ; REFLECTANCES ; SURFACES
WOS类目Remote Sensing ; Imaging Science & Photographic Technology
WOS研究方向Remote Sensing ; Imaging Science & Photographic Technology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/147047
作者单位(1)Univ Valencia, Fac Fis, Dept Termodinam, E-46100 Valencia, Spain
推荐引用方式
GB/T 7714
Camacho-De Coca, F,Garcia-Haro, FJ,Gilabert, MA,et al. Vegetation cover seasonal changes assessment from TM imagery in a semi-arid landscape[J],2004,25(17):3451-3476.
APA Camacho-De Coca, F,Garcia-Haro, FJ,Gilabert, MA,&Melia, J.(2004).Vegetation cover seasonal changes assessment from TM imagery in a semi-arid landscape.INTERNATIONAL JOURNAL OF REMOTE SENSING,25(17),3451-3476.
MLA Camacho-De Coca, F,et al."Vegetation cover seasonal changes assessment from TM imagery in a semi-arid landscape".INTERNATIONAL JOURNAL OF REMOTE SENSING 25.17(2004):3451-3476.
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Camacho-De Coca, F]的文章
[Garcia-Haro, FJ]的文章
[Gilabert, MA]的文章
百度学术
百度学术中相似的文章
[Camacho-De Coca, F]的文章
[Garcia-Haro, FJ]的文章
[Gilabert, MA]的文章
必应学术
必应学术中相似的文章
[Camacho-De Coca, F]的文章
[Garcia-Haro, FJ]的文章
[Gilabert, MA]的文章
相关权益政策
暂无数据
收藏/分享

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。