"Effective Rainfall Modeling and Its Influence on Soil Moisture in Nineveh Province"

Abstract

The research concluded that the second period of the study is the least period in terms of rainfall. This is due to a number of factors that may cause a decrease in rainfall during it, especially the low frequency of rainy frontal depressions. It was also shown that there was a variation in the rain categories during the study periods. In the first category, which is the least rainy (308.61-310) mm, the area percentage in the first period was recorded at (0.28)%, then this area increased during the second period at (2.55)%, then decreased during the third period very slightly at (2.45)%. This category of rain is the least rainy category, as it recorded a small amount of rain, and it also recorded an increase in the area of ​​rain, which means an increase in the least rain category, similar to the case of effective rain. As for the last, sixth category (350.01-362.6) mm, which is the highest rain, it recorded a varying area, as it was (12.79)% during the first period, then decreased during the second period, as its area percentage reached (0.82)%. As for the third period, its area increased very slightly, as its area reached (1.68)%. This category of rain is the highest rainy, and its area is decreasing very clearly, which means that the rain in the study area is decreasing towards decreasing, as is the case for effective rain.