Calibration of USLE Different Versions in Chehelgazi Watershed in Kurdistan

The application of suitable empirical models for estimation of soil erosion andsediment yield is essential owing to nonexistence or lack of associated data in manywatersheds. In the present study, the calibration of different versions of universal soillloss equation Viz. EUSLE, USLE-M, AOF, MUSLE, MUSLT and TAM wasconsidered in estimation of storm-wise sediment yield in Chehelgazi of Gheshlagh DamWatershed in Kurdistan province. To conduct the study, the entire input data werecollected for the Chehelgazi watershed in sanandaj Township. The models’ estimateswere then compared with observed sediment data for 11 storm events. In contrary tohigh correlation coffeicenty among different models’ estimates, the inappliability of thestudy models except calibrated TAM and MUSLE-S was proved in estimation ofmeasured sediment data with the help of correlation matrix and t-test analyses.