Investigation of the Gully Erosion Development and Providing Approaches for Conflict With it (Case Study: Aro Watershed)

Gully erosion is a form of soil erosion by water and it is one of the important processes of land degradation in Iran is important processes which occurs under particular environmental conditions. This type of the erosion caused extensive destruction of the land due to the relatively large size, rapid development and production of sediments. Generally, contributing factors of gully are divided into two categories natural and human. Natural factors include maternal materials sensitivity to erosion, high erodibility of the soil, hydrological conditions, the volume and speed of basin runoff, floods and rodent activity, and in human factors are such as land uses, unprincipled irrigating of land and destruction of vegetation. It is necessary presenting of strategies for conflict with this problem after studying the formation mechanism influencing factors. In order to understanding of various aspects of combating with this phenomenon in Aro basin, located in the Firoozkooh city, overview is done and after determining the types of erosion and sediment yield, the parameters of lithology, slope, soil and land cover as some of the important influencing factors the types of erosion, especially gullies, were studied. Overall, causing factors of gullies are affected by the geology, tectonic, climatic, edaphic, topographic and human activities in this area. These gullies are caused by natural factors and have been expanding by human intervention. Therefore, management must consider all the necessary factors to harnessing them, because history has shown that successful will not be followed with one-dimensional approach.