عنوان مقاله [English]
نویسندگان [English]چکیده [English]
Because of the presence of special properties in semi arid catchment, these areas are suitable for drought events. The responses of these areas to drought events are in the form of the disappearance of plant cover on surfaces slopes, intensive erosion or landslide occurrence on side of riversâ course. Azarshahr catchment (situated in 37Ë 36â² to 37Ë 49â² N and 44Ë 20â² to 45Ë 49â² E) as one catchment of Sahand mountains (located at west slopes of Sahand mountain) has experienced major changes at behaviors of geomorphological processes. The result of assessment of changes of surface and subsurface water, chemical characteristics of water, riversâ sediment data show that these properties and characteristics influence drought events. To determine droughtâs geomorphological effects resultant of these events all data were analyzed applying neutral networks and the final map was obtained by use of Arc/View. The results show that the major effects of drought are present in southern, west and east of Azarshahr catchment. These parts of catchment are very suitable for the occurrence of drought. Gulling, landslides and rill erosion are outcomes of drought.