scholarly journals Fluid flow and sediment entrainment in the Garonne River bore and tidal bore collision

2015 ◽  
Vol 40 (12) ◽  
pp. 1574-1586 ◽  
Author(s):  
Claire E. Keevil ◽  
Hubert Chanson ◽  
David Reungoat
Keyword(s):  
Fluid Flow ◽  
Tidal Bore ◽  
Garonne River ◽  
Sediment Entrainment

scholarly journals Sediment processes and flow reversal in the undular tidal bore of the Garonne River (France)

2013 ◽  
Vol 14 (3) ◽  
pp. 591-616 ◽  
Author(s):  
David Reungoat ◽  
Hubert Chanson ◽  
Bastien Caplain
Keyword(s):  
Flow Reversal ◽  
Tidal Bore ◽  
Garonne River

scholarly journals Field Measurements of Unsteady Turbulence in a Tidal Bore: the Garonne River in October 2013

2015 ◽  
Vol 53 (3) ◽  
pp. 291-301 ◽  
Author(s):  
David Reungoat ◽  
Hubert Chanson ◽  
Claire E. Keevil
Keyword(s):  
Field Measurements ◽  
Tidal Bore ◽  
Garonne River

Comparison of high rate GNSS and GNSS-R measurements for detecting tidal bores in the Garonne River

2020 ◽  
Author(s):  
Pierre Zeiger ◽  
José Darrozes ◽  
Frédéric Frappart ◽  
Guillaume Ramillien ◽  
Laurent Lestarquit ◽  
...  
Keyword(s):  
Sea Level ◽  
Sampling Rate ◽  
Acoustic Doppler Current Profiler ◽  
Satellite System ◽  
High Rate ◽  
Tidal Bore ◽  
Garonne River ◽  
Current Profiler ◽  
Oceanic Tides ◽  
Global Navigation Satellite

<p>The Reflected Global Navigation Satellite System (GNSS-R) is a bi-static radar system in which the receiver collect GNSS signals reflected from the Earth surface and compares them with corresponding direct signals. Measurements can be performed on the waveforms to determine the elevation of the free surface, leading to applications such as ocean altimetry, inland water level variations, soil moisture, snow depth and atmospheric water changes. This study presents the potential of in-situ GNSS-R for tidal bore detection and characterization, and compares it to high rate GNSS observations and other reference datasets.</p><p>The data we used were acquired on 17<sup>th</sup> and 18<sup>th</sup> October 2016 in the Garonne River, at 126 km upstream the mouth of the Gironde estuary. We processed GNSS-based elevations from data acquired on a buoy at a 20 Hz sampling rate using differential GNSS (DGNSS) technique. Acoustic Doppler Current Profiler (ADCP) measurements as well as pressure data were used for validation purposes. These techniques show good results in estimating the amplitude of the first wave, the period of the tidal bore and the oceanic tides. All of these datasets were compared to the retrieval of GNSS-R signals above the river. We have processed the changes in water height throughout the acquisition using <em>Larson et al.</em> (2013) and <em>Roussel et al.</em> (2015) techniques. We finally separate the atmospheric component from the tidal bore and the oceanic tides ones.</p><p> </p><p>Larson, K. M., Löfgren, J. S., and Haas, R. (2013). Coastal sea level measurements using a single geodetic gps receiver. Advances in Space Research, 51(8):1301–1310.</p><p>Roussel, N., Ramillien, G., Frappart, F. et al. (2015). Sea level monitoring and sea state estimate using a single geodetic receiver. Remote Sensing of Environment, 171:261 – 277.</p>

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