Author(s): Daniel Beetz; Christin Kannen; Frank Seidel; Mario J. Franca
Linked Author(s): Mário Franca
Keywords: Surface flow field; Backwater rise; Bed morphology; Hydraulic structures; Experimental hydraulics
Abstract: To overcome measuring complexities of hydromorphological processes in the vicinity of hydraulic structures such as of scour-inducing three-dimensional flows, this study experimentally investigates the interaction between surface flow characteristics and associated bed morphology changes around a circular pier. This aims at contributing to a hydraulically based approach linking surface flow observations and related morphological changes around hydraulic structures, advancing bed morphology assessment in river engineering based on readily obtainable data. The measured parameters revealed that the temporal bed morphology evolution significantly affects the surface flow field and free surface elevations in the vicinity of an in-stream structure. Based on these findings, different qualitative and quantitative relations between surface flow and bed morphology are proposed based on the wake form of the mean flow field, free surface elevations in the near-wake zone, surface velocity distribution, and backwater rise.
Year: 2024