عنوان مقاله [English]
Today, biologic methods are considered as one of the effective approaches to control soil erosion at early stages. Biologic management is a scientific and applied approach to manage and control runoff and soil loss. However, there is no practical and specific algorithm for preparing and implementing biological programs for managing or controlling soil erosion in the watershed scale. Therefore, the present study was conducted as a pioneer study with the aim of developing a practical framework for the biologic management of soil erosion. In this regard, the erosion situation in the watershed was initially proposed to be assessed for designating the regions suitable for biologic management of soil erosion. The development of Ombrothermic and Hythergraph diagrams in combination with topographic, temperature, precipitation, and evapotranspiration data layers was also emphasized to zone agroclimatic conditions. Finally, providing a list of the endemic and dominant species of the study area obtained from phytosociologic studies and soil characteristics was propounded to be used for biologic management of soil erosion in each agroclimate category. The applicability of the proposed model was evaluated for the Oshnavieh Galazchai Watershed in West Azerbaijan Province, Iran. The results showed that 24 and 76% of the watershed are classified in low and moderate situations in viewpoint of soil erosion, respectively. The agroclimate map was then developed for the study watershed and suitable species for aping biologic management were identified for soil erosion and their associated characteristics were extracted. Finally, among the rangeland species in the present study, Achillea millefolium, Agropyron desertorum, Agropyron tauri, Galium verum, Melica persica kunth and Stachys inflata benth as the selected species for biologic management of soil erosion in almost 64% of the Galazchai Watershed. The results of the present study could be extended at the country level for the appropriate biologic management of soil erosion.