Image transforms as a tool for the study of soil salinity and alkalinity dynamics
作者:
R. S. Dwivedi,
K. Sreenivas,
期刊:
International Journal of Remote Sensing
(Taylor Available online 1998)
卷期:
Volume 19,
issue 4
页码: 605-619
ISSN:0143-1161
年代: 1998
DOI:10.1080/014311698215883
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Principal components analysis (PCA), ratioing, image differencing and intensity-hue-saturation (IHS) transformation have been widely used in monitoring various natural resources and environmental hazards. In our study, the temporal behaviour of salt-affected soils in the Indo-Gangetic alluvial plains of Uttar Pradesh has been studied using Landsat MSS data for 1975 and 1992. Apart from routine digital classification of temporal MSS data using Guassian maximum likelihood algorithm, PCA, image differencing, and ratioing were also evaluated for their potential in bringing out temporal changes in salt-affected soils, if any. The results indicate that the third principle component, image differencing, and ratioing of the first two MSS bands for two periods have brought out substantial information associated with the temporal behaviour of saltaffected soils.
点击下载:
PDF (1403KB)
返 回