عنوان مقاله [English]
نویسندگان [English]چکیده [English]
Watershed basins of Iran are very different with a view to geology, unevenness, climate and
the other factors effective in erosion. The aim of this research is study of different types of
erosion in Navroud watershed basin, investigation of the intensity of erosion, sediment
production and the factors effective in this relation. The physiological, topographic, climatic,
geological and geomorphological specifications, plant covering, soil, erosion and sediment
production were generally studied. The area of the basin is about 265.46 square kilometers.
Then with integration of the original work units and their petrological structure. The intensity
of erosion and sediment production in each work unit was investigated with use of
(qualtitative) FAO (experimental method). On the basis of the obtained results subbasins Nos.
Also they have the most amount of sediment production as compared with the other
subbasins. Some of the reasons include the great slope, change of application, ruining of
forests and pastures, construction of roads and existence of the formations sensitive to
erosion. The other subbasins have the least amount of erosion and sedimentation, because
their formation is resistant to erosion and generally includes biotite, sandy lime, tuff and
andesite. Generally the results of this research show that in each work unit, slop is the most
important factor of erosion and this is true in some of the outcrops. The most considerable
factors for occurrence of erosion in a basin include application change, forests and pastures
ruining, road construction and very great slope.