scholarly journals River dredging, channel dynamics and bedload transport in an incised meandering river (the River Semois, Belgium)

2005 ◽  
Vol 21 (7) ◽  
pp. 791-804 ◽  
Author(s):  
F. Gob ◽  
G. Houbrechts ◽  
J. M. Hiver ◽  
F. Petit
Keyword(s):  
Bedload Transport ◽  
Channel Dynamics ◽  
Meandering River

scholarly journals Response of channel dynamics to recent meander neck cut-off in a lowland meandering river with artificial training history: the Morava River, Czech Republic

2018 ◽  
Vol 63 (8) ◽  
pp. 1236-1254 ◽  
Author(s):  
Jakub Ondruch ◽  
Zdeněk Máčka ◽  
Monika Šulc Michalková ◽  
René Putiška ◽  
Martin Knot ◽  
...  
Keyword(s):  
Czech Republic ◽  
Channel Dynamics ◽  
Meandering River ◽  
Training History ◽  
Morava River

scholarly journals Sentinel-1 Satellite Radar Images: a New Source of Information on River Channel Dynamics: Lower Vistula River, Poland.

2021 ◽  
Author(s):  
Klaudia Kryniecka ◽  
Artur Magnuszewski ◽  
Artur Radecki-Pawlik
Keyword(s):  
Research Area ◽  
River Channel ◽  
Bedload Transport ◽  
Low Flow ◽  
Empirical Formulas ◽  
Daily Movement ◽  
Channel Dynamics ◽  
Radar Images ◽  
Vistula River ◽  
Optical Satellite Images

The amount of sediments transported by a river is very difficult to estimate, however this parameter has an important influence on channel geometry. It is possible to estimate the bedload transport rate per unit width of a river channel by measuring bedform profiles’ migration distance (Δl) in time (Δt) and depth of bedload in motion (hb). Another method is instrumental measurements using bedload traps and empirical formulas. Sentinel-1 images at mid latitudes have a temporal resolution of 2–3 days and spatial resolution of 25 m, which allows them to be used on large rivers. The research area in this paper is the Lower Vistula River from km 814 to km 820, where seven alternate sandbars were selected. The coast lines of the sandbars were delineated on Sentinel-1 images taken during two low flow periods 2018.08.04–09.26 and 2019.07.01–08.31 with similar discharges at low flow phase on the hydrograph. From water stage observations at the Chełmno and Grudziądz gauge stations, water elevations were assigned to every coast line of the alternate sandbars. The centers, volumes and longitudinal profile of the alternate sandbars were calculated. Average daily movement of the sandbars in the period 2018.08.04–2019.07.01 was calculated as 0.97 m·day˗1. Similar alternate sandbar movement velocities were obtained from a study of Sentinel-2 optical satellite images and hydro-acoustic measurements on the Lower Vistula River. Having the height of the alternate sandbars and velocity of movement, it was possible to calculate the rate of the bedload transport as qb = 5 kg·s˗1·m˗1. This value is similar to results of empirical formulas accepted for use on large lowland rivers in Poland: Goncarov – 5 kg·s˗1·m˗1, Samov – 3 kg·s˗1·m˗1; Meyer-Peter and Müller – 9 kg·s˗1·m˗1; Skibiński (1976) – 15 kg·s˗1·m˗1. The novelty of this research is showing the use of Sentinel-1 images for the study of river channel dynamics and calculation of bedload transport.

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