Modeling the Effect of Applied Shear Stress on Cohesive Riverbank Erosion

河岸侵蚀，特别是粘性沉积物的侵蚀，是马尼托巴省内许多利益相关者感兴趣的问题。 人们只需要想想温尼伯市每年面临的河岸稳定问题和随后的财产损失，就能体会到侵蚀的重要性。 马尼托巴水力系统也受到这些类型的过程的影响;其水力系统不断经历粘性和非粘性沉积物的侵蚀和沉积。目前关于环境影响说明的条例要求项目提议人说明沉积物的迁移过程，例如河岸侵蚀，以及对水生系统的任何潜在影响。 不幸的是，目前的知识状态的粘性泥沙输运是相对有限的，目前还没有可用的数值模型或方法，已建立和证明是有效的粘性泥沙侵蚀的预测。该项目将努力利用几个马尼托巴水电站多年监测的横截面数据、选定现场位置的详细水深和水力监测以及侵蚀测量装置，为制定一种方法提供数据，以模拟施加的剪切应力对粘性河岸侵蚀的影响。

Riverbank erosion, particularly of cohesive sediments, is of interest to many stakeholders within the Province of Manitoba. One only needs to think of the riverbank stability issues and subsequent property loss facing the City of Winnipeg each year to appreciate the significance of erosion. The Manitoba Hydro hydraulic system is also subject to these types of processes; its hydraulic system continuously experiences erosion and deposition of both cohesive and non-cohesive sediment. Current regulations for environmental impact statements require that project proponents address sediment transport processes, such as riverbank erosion, as well as any potential effect on aquatic systems. Unfortunately, the current state of knowledge of cohesive sediment transport is relatively limited, and there is no currently available numerical model or methodology that has been established and proven to be effective for predictions of cohesive sediment erosion. This project will endeavour to use years of monitored cross-sectional data from several Manitoba Hydro sites, detailed bathymetric and hydraulic monitoring of selected field locations as well as an erosion measurement device to provide data for developing a methodology for modeling the effect of applied shear stress on cohesive riverbank erosion.