Document Type : Original Article


1 M.Sc. Graduated, Borujerd Branch, Islamic Azad University, Borujerd, Iran

2 M.Sc. Student, Department of Natural Resource, University of Sari, Iran



Drought is a natural hazard that has significant impact on economic, agricultural, environmental, and social aspects. In the present study details analysis of rainfall data has been carried out for the years 1981-2011. Standard precipitation index (SPI) has been used to evaluate the precipitation deficit in the Karun watershed of Iran. The results indicated that 1981-82,82-83,83-84,84-85,88-89,89-90,90-91,93-94,96-97,98-99,99-2000,2000-2001,2002-2003,2007-2008,2008-2009, 2009-2010  and 2010-2011 the SPI values is negative. It is very anguish. And also this found threat drought the water resource and agriculture


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