Özet:

Geographical Information systems (GIS) has been widely utilized in engineering applications because it has been considered as a very powerful, important, strong, and necessary tool, especially in the study of soil erosion. In the present study, Remote Sensing and GIS have been utilized to determine the values and mapping the spatial distribution of rainfall erosivity (R) for the Harir River Basin. The area of study is 350.03 km2, and it is located between (36° 20' 00" N to 36° 40' 00" N) latitude and (44° 10' 00" E to 44° 30' 00" E) longitude and the elevation of Harir River Basin is ranged from 366 m to 1823 m. The digital elevation model for Harir River Basin with 30 m resolution has been used. The (IDW) method has been utilized in order to interpolate and generate the spatial distribution of the average annual rainfall stations data. The average annual rainfall data from 2000 to 2021 for five meteorological stations (Harir, Khalifan, Shaqlawa, Rawanduz and Soran) were used. The results have been demonstrated that the average annual rainfall from 2000 to 2021 for Harir River Basin is ranged from 619.013 mm to 774. 173 mm. Additionally, three equations have been utilized in order to determine the values of rainfall erosivity of Harir River Basin.  The results have been demonstrated that the average rainfall erosivity for Harir River Basin is ranged from 1528.42 (MJ.mm/ha/h/year) to 2100.00 (MJ.mm/ha/h/year). As well as the results have been demonstrated that 100% of the area of study is under class of low rainfall erosivity.

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