The effect of parent material and land-use on soil erosion: a case study of the Taleghan drainage basin, Iran

摘要

The objective of this study was to investigate the effect of parent rock and different land-uses on soil erosion in the Taleghan drainage basin. For this purpose, a geological map of the area was prepared by photogeo-logical studies and field control. Soil profiles were investigated and soil samples were taken on uniform morphological units of each lithological unit. Samples were then analysed for physical and chemical characteristics Based on physical and chemical characteristics, they were classified and analysed using factor analysis. Three parent materials, including gypsum, alluvial deposits, and basalt, and three land-uses, including rangeland, agriculture and dry-farming cultivation were examined, and soil erodibility factors were derived for each and analysed by variance analysis The results show that erodibility increases as lithology changes from basalt to alluvial deposits and to gypsum. Erodibility was also highest in areas of dry farming and least for rangelands.