University of Tehran Press Iranian Journal of Soil and Water Research 2008-479X 41 1 2010 08 23 Some Causes of Gully Formation in Two Catchments of Naviz and Hashan as Found through Remote Sensing and Geographical Information System Some Causes of Gully Formation in Two Catchments of Naviz and Hashan as Found through Remote Sensing and Geographical Information System 21044 FA A. Raeisi Neshat F. Sarmadian H. Refahi M. Gorji 0000-0002-2809-8316 Journal Article . Aerial photograph Digital Elevation Model Gully erosion Orthophoto https://ijswr.ut.ac.ir/article_21044_aba0914ea8fdd89e9755d3a90ab757ff.pdf