Ahmad Mokhtari - a Assistant Professor, Soil Conservation and Watershed Management department, Isfahan Agricultural and Natural Resources Research and Education Center, AREEO, Isfahan, Iran
Kourosh Shirani - Assistant Professor, Soil Conservation and Watershed Management department, Isfahan Agricultural and Natural Resources Research and Education Center, AREEO, Isfahan, Iran
Farzad Heidari - Scientific board member, Soil Conservation and Watershed Management department, Isfahan Agricultural and Natural Resources Research and Education Center, AREEO, Isfahan, Iran

the lithological maps is inevitable in the preparation of rock unit’s erosion susceptibility maps. In this study, rock unit outcrops in the Soh Basin (۵۰ km Northern Isfahan) were extracted using nonlinear correlation analysis of satellite data. Moreover, rock unit’s erosion susceptibility such as marl, shale, and quaternary deposits and resistant rock units such as sandstone and limestone were extracted based on soil erosion intensity factors. The lithology of the basin was studied usingthe virtual variables method. Initially, rock units, as a virtual independent variable, and the PC۱ (the first principal component) of ETM+ multispectral bands were by amultiple linear regression model. Afterward, rock units were in logistic regression analysis as virtual dependent variables. The results revealed that logistic regression analysis is a suitable model for rock unit’s extraction.          

satellite data, Landsat ETM +, lithological mapping, soil erosion susceptibility, Logistic regression