Author(s): Sandor Baranya; Gergely T. Torok
Linked Author(s): Sándor Baranya
Keywords: No Keywords
Abstract: Quantification of bedload transport of rivers is of major interest since this mode of sediment transport plays a crucial role in the morphological changes. Direct measurement of bedload transport in large rivers is, however, challenging, sometimes even not feasible. To overcome this issue, surrogate acoustic techniques have been thoroughly tested to quantify bedload transport, but there are still open questions regarding their use in field circumstances, especially in large rivers. In this paper we introduce the results of an intensive bedload measurement campaign, performed in the gravel bed section of the Danube River in Hungary between 20192021. A so called BfG type bedload sampler was employed to measure the sediment transport in a direct manner, moreover, parallel with the sampling, acoustic Doppler current profiler (ADCP) was also used from the mounted on the sampling vessel. The bias of the Bottom Tracking signal from the GPS detected real positions was analyzed and compared with the measured bedload transport rates. Furthermore, video camera footages taken from the bedload sampler provided crucial supporting information about the uncertainties of the direct sampling.
Year: 2022