The Efficiency of Meteorological Drought Indices for Drought Monitoring and Evaluating in Kohgilouye and Boyerahmad Province, Iran
Journal Title: International Journal of Modern Engineering Research (IJMER) - Year 2013, Vol 3, Issue 4
Abstract
Drought is one of the most common natural events that have a great negative impact on agriculture and water resources. Recently, a new index for drought assessment and monitoring is presented called Reconnaissance Drought Index (RDI). RDI is calculated based on precipitation and potential evapotranspiration. In this study, indices of SPI (Standardized Precipitation Index) and RDI were calculated using 30 years meteorological data (1982 to 2012) for Kohgilouye and Boyerahmad Province located in iran. The negative values show the dry years of the historical record. It can be seen that the most sever drought occurred during the year 2007- 2010. Correlation analysis is performed to identify differences of the SPI and RDI in different time scales. Results show the presented correlation coefficients increase in the longer time scales such as (9 and 12 months). The Map of Spatial distribution of drought severity for 2010 obtained based on the SPI and RDI by means of geostatistics methods in the study area. It can be observed that East part of the watershed lie in the moderately class and the rest of area is generally characterized by severe drought. In this paper however it was shown that RDI can be used for monitoring purposes and to a certain extent for short period drought forecasting.
Authors and Affiliations
Arash Asadi
Keywords
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