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，是马尼托巴省许多利益攸关方感兴趣的问题。人们只需想想每年温尼伯市面临的河岸稳定性问题和随之而来的财产损失，就能体会到侵蚀的重要性。马尼托巴省水力系统也受到这类过程的影响；其液压系统不断遭受粘性泥沙和非粘性泥沙的侵蚀和沉积。目前关于环境影响说明的规定要求项目倡导者处理泥沙输送过程，如河岸侵蚀，以及对水生系统的任何潜在影响。遗憾的是，目前对粘性泥沙输移的认识相对有限，目前还没有已建立并被证明有效的预测粘性泥沙侵蚀的数值模型或方法。该项目将努力利用马尼托巴省几个水电工地多年监测的横断面数据、对选定的实地地点的详细水深和水力监测以及侵蚀测量装置，以提供数据，为建立外加剪应力对粘性河岸侵蚀影响的建模方法提供数据。

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.