2D modelling: Rubar20 and Rubar20TS

Software Rubar 20 solves 2-D de Saint Venant equations using explicit finite volumes method. It integrates supercritical flow and breaching of embankment.

Coupling a advection diffusion equation permits to simulate solute, sediment or hydrocarbon transport and eventually to modify topography (Rubar 20 TS software).

Scientific questions

  • Developing hydrodynamic and morphological code permiting to simulate extreme floods including levee failures.
  • Describing all the obstacles and exchanges during an urban flood
  • Taking into account sediment varaibility through two parameters: median diameter d50 and standard deviation σ; how to manage the evolution of these two parameters using specific equations for deposition, erosion, mixtures, for instance to represent grain sorting.

General information


To join us: rubar20@inrae.fr

Example of result

Erosion downstream a breach during a 100 year flood




  • LMFA, INSA Lyon
  • Ljubljana University, Slovenia


  • 2010-2013 : Bazin P.H.   Flows during floods in urban areas: influence of the detailed topography and exchanges with the sewer system. Université C. Bernard, Lyon 1. 
  • 2002-2005: Mignot E. . Etude expérimentale et numérique de l’inondation d’une zone urbanisée : cas des écoulements dans les carrefours en croix  . Ecole Centrale, Lyon.


  • Paquier, A., Bazin, P.H., El kadi Abderrezzak, K. (2019) Sensitivity of 2-D hydrodynamic modelling of urban floods to the forcing inputs: Lessons from two field cases. Urban Water Journal  doi: 10.1080/1573062X.2019.1669200.

  • Bazin, P.H., Mignot, E., and Paquier, A. (2017) Computing flooding of crossroads with obstacles using a 2D numerical model, Journal of Hydraulic Research, 55(1): 72-84, DOI: 10.1080/00221686.2016.1217947

  • Bazin, P.H. , Nakagawa, H. , Kawaike, K. , Paquier, A. ; Mignot, E. (2014).  Modeling Flow Exchanges between a Street and an Underground Drainage Pipe during Urban Floods. Journal of Hydraulic Engineering . 140, 10 p.

  • Bazin, P.H. , Bessette, A. , Mignot, E.,  Paquier, A. & Rivière, N. (2012). Influence of Detailed Topography when Modeling Flows in Street Junction During Urban Flood. Journal of Disaster Research,  7 (5): 560-566

  • Soares-Frazão, S., Canelas, R., Cao, Z., Cea, L., Chaudhry, H. M., Die Moran, A., El Kadi, K., Ferreira, R., Fraga Cadórniga, I., Gonzalez-Ramirez, N., Greco, M., Huang, W., Imran, J., Le Coz, J., Marsooli, R., Paquier, A., Pender, G., Pontillo, M., Puertas, J., Spinewine, B., Swartenbroekx, C., Tsubaki, R., Villaret, R., Wu, W., Yue, Z., Zech, Y. (2012) – Dam-break flows over mobile beds: experiments and benchmark tests for numerical models, Journal of Hydraulic Research, vol. 50(4), 364-375

  • El kadi, K., Paquier, A., Mignot, E. (2009). Modelling flash flood propagation in urban areas using a two-dimensional numerical model. Natural Hazards, vol. 50, p. 433-460