evaluation and mapping of desertification condition in fakhrabad- mehriz region with the icd and micd models

there are different models for mapping and evaluation of desertification condition, such as global fao_unep model. there are also several models for evaluation of desertification in iran. in this study, tow fol/owing methods was used: 1-icd method, (iranian classification of desertification). 2- micd method, (modified iranian classification of desertification). in this research, at first, these models were considered and indices and factors were improved. then, working unit map in this region was made by geomorphologic method and land use of each working unit was determined. this map has 14 working unit. at last, evaluation of desertification condition was determined in this region by icd and micd methods. the results methods were: - in icd method, from an intensity of desertification point of view, fakhrabad -mhriz region is in low and medium classes. in this region the low class is about 82351 hectare (91.59%) and the medium class is about 7565 hectare (8.41%) of total area. in micd method, this region has four classes of calm, low, medium and high. the calm class is about 33327 hectare (37.06%), low class is about 8346 hectare (9.28%), medium class is about 37245 hectare (41.42%) and high class is about 10998 hectare (12.23%). according the results of this investigation and by comparing them with the condition which have been observed in the fkhrabad-mehriz region, the micd is better method for evaluation of desertification condition in this region.