Identification of the most effective elements in rill erosion process and its occasion in Ahmad-Abad, Mashhad

Rill erosion is one of natural disaster witch in a world-wide scale it has allocated maximum amount of soil loss. This study aims is to determine the most effective elements in rill erosion (9parameters) in Ahmad-Abad، Mashhad region. Most of investigated parameters such as ground cover، canopy cover، gravel cover، amount of available clay and interaction of slope length and its amount have significant correlations with rill occurrence and its occasion. Moreover، the amount of rills has the highest correlation with groundcover. Accordingly، vegetation managements have to be considered as the first step to reduce erosion potential in Ahmad-Abad region.