Soil erosion due to rainfall and runoff is a -serious problem that has led to the development oIInnovative techniques, using geosynthetics, to alleviate it. The diversity and increasing number of geosynthetic erosion control systems along with the lack of a comprehensive method to evaluate their effectiveness has made it difficult for designers and practitioners to select the proper system under different meteorological, topographic, and soil conditions. Therefore, a laboratory experimental system was constructed to evaluate the performance of various erosion control systems on steep slopes under reproducible,,