Abstract
Through statistical analysis and determine the date and place of daily rainfall for the study area, which included ten stations from Iraq (2007-2016) It turned out that the behavior of daily rainfall varied significantly from Extreme values reached (89 mm) in Baghdad to min. (0.2mm) in Samawah, Although most of the months of rainy season did not record any rain. Baghdad, Mosul, Khanken and Kirkuk are most variable stations of rain with SD (4). The reason for the change in the amount of daily rain and the difference in distribution between the months of the rainy season is due to the nature of the atmospheric depression where very severe cases it results from the deepening of the atmospheric low surface pressure In this study, it was found that the daily rains of Iraq are not only varying in amount but also a different in Persisting with (1-4and more) days where In March all stations have max. Frequency persisting one day but persisting two days was in January while December persisting three days but persisting four days and more recorded in December. This is due to the nature of the atmospheric depression where very severe cases it results from the Atmospheric depression deepened from the upper atmosphere.
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