Drought is natural and complex phenomenon which happens everywhere. Its occurrences have always followed by huge damage. Considering its damage figures and statistics, the drought d studying and monitoring is necessities confirmed. During recent years, our country Iran was faced by many drought events which have damaged the natural resources which cannot be compensated: therefore, studying drought is essential for researches and managers. The purpose of this study is "Monitoring drought using satellite data with emphasis on vegetation cover in Semirom region". TM, WiFS and AWiFS satellite images of 1996, 2004 and 2009 were used, respectively. In order to perform the studying purpose, the field data were collected during the may 2009 simultaneously with AWiFS data acquisition data. Then considering the environmental factors such as altitude, slope direction, climatic factors and vegetation indices derived from above satellite data, multiple regression equations were prepared using step-wise regression analysis. The intended regression model for each year, were used to produce percentage vegetation cover of the study area. For a suitable pasture vegetation map interpretation to split the vegetation cover dir=ltr Keyword : Drought monitoring, Satellite data, Semirom, The sensors TM, WiFS and AWiFS.
