New technologies for flow measurement

 The team conducts research to develop, improve and validate innovative and even alternative river measurement technologies, in order to support and promote their operational use, in particular :

•  hydro-acoustic profilers (ADCP) for the measurement and monitoring of river discharges: Le Coz et al, 2008a, 2008b
•  video-based velocity and discharge measurements: Jodeau et al. 2008, Le Coz et al. 2010, 2016, Dramais et al. 2011, Le Boursicaud et al. 2016, Khalid et al. 2019, Bodart et al. 2022, 2024
•  portable surface velocity radars (SVR): Welber et al. (2016)
•  low-cost/low-tech streamgauging instruments such as streamgauging rulers: Le Coz et al. (submitted)
•  acoustic inversion, and single-frequency (ADCP) and multi-frequency (ABS) acoustic backscatter systems for measuring concentrations of fine particles and suspended sand in rivers: Moore et al. (2012, 2013), Vergne et al. (2020, 2021, 2023), Marggraf et al. (submitted)
•  sediment traps for the integrative monitoring of fine particles and contaminants in rivers: Masson et al. (2018)

References

Bodart, G., Le Coz, J., Jodeau, M., Hauet, A. (2022) Synthetic river flow videos for evaluating image-based velocimetry methods, Water Resources Research, 58, e2022WR032251.

Bodart, G., Le Coz, J., Hauet, A., Jodeau, J. (2024) Quantifying and reducing the operator effect in LSPIV velocity and discharge measurements, Water Resources Research, 60, e2023WR034740.

Dramais, G., Le Coz, J., Camenen, B., Hauet, A. (2011) Advantages of a mobile LSPIV method for measuring flood discharges and improving stage-discharge curves, Journal of Hydro-Environment Research, 5, 301-312

Khalid, M., Pénard, L., Mémin, E. (2019) Optical flow for image-based river velocity estimation, Flow Measurement and Instrumentation, 65, pp. 110–121

Jodeau, M., Hauet, A., Paquier, A., Le Coz, J., Dramais, G. (2008) Application and evaluation of LS-PIV technique for the monitoring of river surface velocities in high flow conditions, Flow Measurement and Instrumentation, 19(2), 117-127

Le Boursicaud, R., Pénard, L., Hauet, A., Le Coz, J. (2016) Gauging extreme floods on YouTube: Application of LSPIV to home movies for the post-event determination of stream discharges, Hydrological Processes, 30, 90-105

Le Coz, J., Pierrefeu, G., Saysset,G., Brochot, J.F., Marchand, P. (2008a) Mesures hydrologiques par profileurs Doppler ADCP [Hydrological measurements with ADCP Doppler profilers], Eds. Quae, 164 p.

Le Coz, J., G. Pierrefeu, and A. Paquier (2008a) Evaluation of river discharges monitored by a fixed side-looking Doppler profiler, Water Resources Research, 44, W00D09

Le Coz, J., Hauet, A., Pierrefeu, G., Dramais, G., Camenen, B. (2010) Performance of image-based velocimetry (LSPIV) applied to flash-flood discharge measurements in Mediterranean rivers, Journal of Hydrology, 394 (1-2), 42-52

Le Coz J., Patalano A., Collins D., Guillén N. F., García C. M., Smart G. M., Bind J., Chiaverini A., Le Boursicaud R., Dramais G., Braud I. (2016) Crowdsourced data for flood hydrology: feedback from recent citizen science projects in Argentina, France and New Zealand, Journal of Hydrology, 541, 766-777

Le Coz, J., Pernot, F., Buffet, A., Lagouy, M., Berni, C. (submitted) The streamgauging ruler: a low-cost, low-tech, alternative discharge measurement technique, Journal of Hydrology

Marggraf, J., Le Coz, J., Camenen, B., Lauters, F., Dramais, G., Pierrefeu, G., Topping, D.J. (soumis) Improving hydroacoustic methods for monitoring suspended-sand flux and grain-size in sediment-laden rivers, Earth Surface Processes and Landforms

Masson, M., Angot, H., Le Bescond, C., Launay, M., Dabrin, A., Miège, C., Le Coz, J., Coquery, M. (2018) Sampling of suspended particulate matter using particle traps in the Rhône River: Relevance and representativeness for the monitoring of contaminants, Science of the Total Environment, 637-638, 538-549

Moore, S.A., Le Coz, J., Hurther, D., Paquier, A. (2013) Using multi-frequency attenuation to monitor grain size and concentration of suspended sediment in rivers, Journal of the Acoustical Society of America, 133 (4), 1959–1970

Moore, S.A., Le Coz, J., Hurther, D., Paquier, A. (2012) - On the Application of Horizontal ADCPs to Suspended Sediment Transport Surveys in Rivers, Continental Shelf Research, 46, 50-63

Vergne, A., Le Coz, J., Berni, C., Pierrefeu, G. (2020) Using a down-looking multi-frequency ABS for measuring suspended sediments in rivers, Water Resources Research, 56, e2019WR024877

Vergne, A., Berni, C., Le Coz, J., Tencé, F. (2021) Acoustic backscatter and attenuation due to river fine sediments: experimental evaluation of models and inversion methods, Water Resources Research, 57, e2021WR029589

Vergne, A., Le Coz, J., Berni, C. (2023) Some backscatter modelling issues complicating the sonar-based monitoring of suspended sediments in rivers, Water Resources Research, 59, 2022WR032341.

Welber, M., Le Coz, J., Laronne, J.B., Zolezzi, G., Zamler, D., Dramais, G., Hauet, A., Salvaro, M. (2016) Field assessment of non-contact stream gauging using portable surface velocity radars (SVR), Water Resources Research, 52, 1108–1126