Study on the Possible Variations of effective Rainfall in Climatic Zones for Wheat Crop

Droughts, Floods, and extremes of meteorological parameters are among the cases which may happen due to climate change. This phenomenon highly affects agricultural products. Therefore, analysis of effective rainfall is one of the important sources of soil moisture. Therefore, analysis of effective rainfall in planning of dry farming is essential. In this study two downscale models (ASD and LARS-WG5) were used for prediction of changes in effective rainfall. The models were run for 3 future periods of 30 years in 19 synoptic stations which are located in different climatic zones of Iran. The results showed that effective rainfall in Zahedan station will increase 2.35, 2.32, and 2.31 times in next future 30 years periods. These values for Yazd are 3.1,3.0 and 3.0, respectively.