Hydro-abrasion processes and modelling at hydraulic structures and steep bedrock rivers: 1. Hydro-abrasion and cover effect

作者：Dila Demiral, Ismail Albayrak, Jens M. Turowski, Robert M. Boes · 发表于：Journal of Hydro-environment Research · 年份：2025 · DOI：10.1016/j.jher.2025.100691 · 被引用次数：1 · 研究领域：Hydrology and Sediment Transport Processes、Hydraulic flow and structures、Geological formations and processes

• This study enhances hydro-abrasion model for sustainable hydraulic design and predicting river and landscape evolution. • Experiments explore hydro-abrasion depth and patterns under varied hydraulic, sediment transport, and bed material conditions. • Results reveal increased abrasion rates with higher sediment supply and material hardness. • Abrasion patterns are governed by the flume width-to-water depth ratio and the homogeneity of bed lining material. • Peak abrasion rates occur when the sediment transport rate reaches sediment transport capacity of the flow. Hydro-abrasion refers to the gradual loss of material on the surface of a solid body, caused by mechanical stress, mainly from the impacts of sediment saltation in flowing water. Hydraulic structures like weirs, spillways, diversion tunnels, and especially sediment bypass tunnels (SBTs) experience significant hydro-abrasion due to high flow velocities and elevated sediment transport rates. The hydro-abrasion process is critical in hydraulic engineering, where material loss can lead to structural damage and costly repairs, and in geomorphology, where it drives bedrock incision and shapes landscape evolution over time. This study aims to advance the knowledge of hydro-abrasion mechanics (part I, present paper) and to enhance a mechanistic saltation hydro-abrasion model (part 2) for predicting river and landscape evolution and hydro-abrasion at hydraulic structures. To this end, hydro-abrasion tests of polyurethane foa...