Efficiency Assessment of Desertification Model of IMDPA for Evaluating of Water and Wind Erosions

For the assessment and mapping of desertification and erosion models and methods were provided including, IMDPA, PSIAC and IRIFR. In this study, IMDPA model (as evaluation model of desertification potential) and PSIAC model (as evaluation model of water erosion) and IRIFR model (as also dedicated to wind erosion) has been used. Purpose of study is evaluation the water and wind erosion by IMDPA model and base on integration methods of geometric mean and maximum limitation. Then these models were compared to current state of degradation and IRIFR, MPSIAC models. Results show that proposed IMDPA model by maximum limitation has higher correlation to current state of degradation than IRIFR, MPSIAC models. Although both are significantly correlated well with the above criteria.  The results also show that erosion map conducted by IMDPA model base on geometric limitation doesn’t have significant correlation (R=-0.298) with current state of degradation, showing current method of IMDPA is not suitable. In verse, the result of the proposed model of IMDPA by maximum limitation (R=-0.925**) is the most suitable method for mapping of erosion in desert and arid regions.