The rainfall factor R has almost the same importance as the topographical factor T for the susceptibility for landsliding (P).
The topographical factor T has almost the same influence than the rainfall factor R on the probability of shallow landsliding. .
In some research work, the duration of rainfall is used as one rainfall factor (Caine 1980, Godt et al. 2008, Baum et al. 2005).
These authors use another rainfall factor: the mean rainfall intensity in the rainfall intensity duration model to predict the occurrence of shallow landslides.
The landscape indicator was significantly correlated to sediment delivery ratio, and explained 98% variation in sediment yield rate not considering precipitation by dropping the rainfall factor.
Results of Pearson correlation analysis indicated that the rainfall factor in RUSLE was the dominant control and explained 93% of variance in sediment yield rate.
More work should be conducted for other types of soil to find the suitable values for the topographical factor T and rainfall factor R. In this study an intensity-cumulative rainfall model was used for the rainfall factor instead of an intensity duration model.
Results by Pearson correlation analysis indicate that the dominant factor in the integrated model is the rainfall factor explaining > 80% of the variations in both sediment and organic carbon loss.
