期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：2006
卷号：XXXVI Part 4
出版社：Copernicus Publications
摘要：Drought and floods are the two extreme manifestations of the hydrologic cycle on the land surface of the earth. The conventional techniques of drought monitoring are i) Statistical analysis of rainfall data ii) Water balance methods. Recently, the availability of multi-temporal and multi-spectral remote sensing information has enabled measurement and monitoring of land cover condition, especially the Advanced Very High Resolution Radiometer (AVHRR) sensor on National Oceanic and Atmospheric Administration (NOAA) satellite to provide daily data for large area which will help to study the spatial distribution, seasonal and inter annual change of vegetation for large area. The analysis was carried out for a period of four years (2002-2005) and from SPI analysis; it was observed that the year 2002 was drought year. On the basis of satellite-based indices, the study area was divided into various categories of drought and they are extreme, severe, moderate, slight drought and normal condition. It was found that in the year 2002 all the area was affected by drought with greater intensity, mostly by extreme and severe drought condition.
