Lazzarin et al. - Flood discharge estimation from sparse velocity measurements using inverse 3D-CFD modelling

DATA

This folder contains the following data:

Fig3. Water level recorded at the Ponte di Piave monitoring station, discharge estimated using the Eq. (7) rating curve, and ADCP measurements. Water-level data, rating-curve information, and ADCP measurements are from ARPAV.

Fig4. Comparison between measured and simulated streamwise velocity fields in the investigated cross section for the measurements of 29 October at 11:00 (a) and 31 October 2018 at 17:30 (b). Measured velocity fields were obtained by elaborating raw ADCP data from ARPAV; simulated velocity fields are from the 3D-CFD model without and with the momentum sink term for vegetation-induced drag.

Fig5. Simulated cross-sectional flood velocity distributions 15 m downstream of the road bridge for Q = 2166 m³/s (a) and 2666 m³/s (b), and comparison with the available point velocity measurements. Spanwise profiles of flow velocity computed 0.5 m below (c) and at the free-surface (d) for selected discharge values, compared with available measurements. Velocity measurements are from ARPAV.

Fig6. RMSE between measured and predicted velocity as a function of simulated discharge for simulations without and with momentum sink term for the vegetation-induced drag.

Fig7. Comparison between the available stage-discharge relationships, flowrate measurements, and the results of the inverse approach based on CFD flow-field reconstruction. Stage–discharge relationships and flowrate measurements are from ARPAV.

Fig8. Comparison of 3D CFD (a) and entropy (b) reconstructions of the velocity fields at the section S1, 15 m downstream of the road bridge for the target discharge value (2369 m³/s).

Fig9. Depth-averaged velocity (a) and specific discharge (b) profiles along the section S1, 15 m downstream of the road bridge for the target discharge value (2369 m³/s) and the different models.

Fig10. Depth-averaged velocity distribution at the bridge from the 3D-CFD (a) and the 2D model (b), for the target discharge value (2369 m³/s).