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).

Rubar 20 as well as Rubar20TS can be coupled with respectively Rubar 3 or RubarBE in order to perform a coupled 1D /2D calculation.

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