تحليل التغيير في مواسم الامطار لمحطتي الخالص وخانقين في محافظة ديالى

Abstract

This research aims to analyze the changes in rainfall seasons for Al-Khalis and Khanaqin stations during the period (1991–2024) in Diyala Governorate, relying on rainfall data from the NASA POWER website. It is worth noting that the data is spatial rather than point-based, measuring an area of approximately 50km. The study period was divided into two distinct timeframes: (1991–2007) and (2008–2024), where variations were examined across the autumn, winter, and spring rainy seasons. This analysis relied on several statistical methods, such as the arithmetic mean, standard deviation, and coefficient of variation (oscillation coefficient), to measure and understand the rates and degree of variance and discrepancy in rainfall amounts. The results revealed differences in rainfall rates and variations in the coefficient of variation between the two stations; the autumn and spring seasons exhibited instability and fluctuation in rainfall, whereas winter was the most stable season. Furthermore, the results indicated an increase in rainfall rates during the second period compared to the first, along with a decrease in the coefficient of variation. These findings demonstrate clear shifts in the nature of rainfall throughout the study period, which subsequently impacts water resources and agricultural activities in Diyala Governorate