Modeling the Effect of Applied Shear Stress on Cohesive Riverbank Erosion

河岸侵蚀，特别是粘性沉积物，是马尼托巴省许多利益相关者感兴趣的问题。只要想想温尼伯市每年面临的河岸稳定性问题和随之而来的财产损失，就能明白侵蚀的重要性。马尼托巴液压系统也受到这些类型的过程的影响；它的液压系统不断受到粘性和非粘性泥沙的侵蚀和沉积。现行的环境影响报告规定要求项目发起人说明泥沙运输过程，如河岸侵蚀，以及对水生系统的任何潜在影响。不幸的是，目前对粘性泥沙输运的了解相对有限，目前还没有建立并证明有效预测粘性泥沙侵蚀的数值模型或方法。该项目将努力利用多年来马尼托巴水电站几个站点的监测横截面数据，对选定的现场位置进行详细的水深和水力监测，以及一个侵蚀测量装置，为开发一种方法提供数据，用于模拟施加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.