Gullies that are expanding at alarming rate are responsible for the majority of soil losses in the (sub) humid highlands of Ethiopia. Few affordable and effective methods for gully erosion control are available in the highlands. The objective of the study was to develop cost-effective measures to halt gully expansion by determining stable-bank conditions under a variety of environmental situations using the Bank Stability and Toe Erosion Model (BSTEM). The study was carried out in the sub humid Debre Mawi watershed, located 30 km south of Lake Tana. Input data for the BSTEM model were collected using field surveys and soil sampling. After the BSTEM was tested on actual measured soil data, soil cohesion and internal friction angle were calibrated against observed gully bank retreat. Using the calibrated parameters, the model evaluated the stabilization of the existing gully bank under different scenarios in which groundwater table, bank angle and bank height, tension crack depth, vegetation, and toe protection were varied. Finally, the head-cut of the study gully was treated based on the model recommendation. The simulated results showed that a 5 m deep gully was stable under fully saturated conditions when the bank toe is protected, its upper surface is vegetated, and its bank angles do not exceed 45°. If the depth of the gully is less than 5 m or if its water table is deeper than 0.5 m, only regrading the gully bank to an angle of 45° can stabilize the gully. BSTEM showed to be an effective tool that can be used to evaluate gully control measures.

在埃塞俄比亚（亚）湿润的高地，造成大量土壤流失的原因是沟壑以惊人的速度增长。在高地，很少有负担得起且有效的沟壑侵蚀控制方法。该研究的目的是通过使用银行稳定性和脚趾侵蚀模型（BSTEM）确定各种环境条件下的稳定银行状况，从而开发出经济有效的措施来阻止河谷扩张。这项研究是在塔纳湖以南30公里的Debre Mawi湿润小流域进行的。使用实地调查和土壤采样收集了BSTEM模型的输入数据。在根据实际测得的土壤数据对BSTEM进行测试之后，针对观察到的沟岸退缩对土壤内聚力和内摩擦角进行了校准。使用校准的参数，该模型评估了在不同地下水位，河岸角和河岸高度，张拉裂缝深度，植被和脚趾保护有所不同的情况下，现有沟壑岸的稳定性。最后，根据模型建议处理研究沟的头部。模拟结果表明，当堤岸受到保护，其上表面被植被覆盖且堤角不超过45°时，在完全饱和条件下5 m深的沟渠是稳定的。如果沟壑的深度小于5 m或地下水位深于0.5 m，则只有将沟壑坡度调整为45°才能稳定沟壑。BSTEM被证明是可用于评估沟壑控制措施的有效工具。堤岸角和堤岸高度，张力裂缝深度，植被和脚趾防护均有所不同。最后，根据模型建议处理研究沟的头部。模拟结果表明，当堤岸受到保护，其上表面被植被覆盖且堤角不超过45°时，在完全饱和条件下5 m深的沟渠是稳定的。如果沟壑的深度小于5 m或地下水位深于0.5 m，则只有将沟壑坡度调整为45°才能稳定沟壑。BSTEM被证明是可用于评估沟壑控制措施的有效工具。堤岸角和堤岸高度，张力裂缝深度，植被和脚趾防护均有所不同。最后，根据模型建议处理研究沟的头部。模拟结果表明，当堤岸受到保护，其上表面被植被覆盖且堤角不超过45°时，在完全饱和条件下5 m深的沟渠是稳定的。如果沟壑的深度小于5 m或地下水位深于0.5 m，则只有将沟壑坡度调整为45°才能稳定沟壑。BSTEM被证明是可用于评估沟壑控制措施的有效工具。模拟结果表明，当堤岸受到保护，其上表面被植被覆盖且堤角不超过45°时，在完全饱和条件下5 m深的沟渠是稳定的。如果沟壑的深度小于5 m或地下水位深于0.5 m，则只有将沟壑坡度调整为45°才能稳定沟壑。BSTEM被证明是可用于评估沟壑控制措施的有效工具。模拟结果表明，当堤岸受到保护，其上表面被植被覆盖且堤角不超过45°时，在完全饱和条件下5 m深的沟渠是稳定的。如果沟壑的深度小于5 m或地下水位深于0.5 m，则只有将沟壑坡度调整为45°才能稳定沟壑。BSTEM被证明是可用于评估沟壑控制措施的有效工具。