dam break; dam breaching; hydrodynamic modelling; finite volume; risk analysis; breach parameters; sensitivity analysis
Abstract :
[en] Hazard analysis of dams arranged in complex or in cascade may involve the assessment of a large number of different scenarios of combined failures. However, a tremendous computation time would be needed to perform a detailed modelling of the flows generated by all possible scenarios. Therefore, the present paper describes a methodology for analysing the flows induced by the most relevant incidents occurring on a complex or in a cascade of dams and reservoirs.
The methodology combines several hydrodynamic models, including the two-dimensional flow solver WOLF 2D and a simplified lumped hydrodynamic model, to simulate the flows induced on the dams complex, the potential breaching in cascade of other dams, as well as the propagation of the flood wave in the whole downstream valley. The application of the methodology to a practical case study involving a complex of five dams is also described.
Research Center/Unit :
Aquapôle - ULiège
Disciplines :
Civil engineering
Author, co-author :
Dewals, Benjamin ; Université de Liège - ULiège > Département Argenco : Secteur MS2F > Hydrodynamique appl. et constructions hydrauliques (HACH)
Archambeau, Pierre ; Université de Liège - ULiège > Département Argenco : Secteur MS2F > Hydrodynamique appl. et constructions hydrauliques (HACH)
Erpicum, Sébastien ; Université de Liège - ULiège > Département Argenco : Secteur MS2F > Hydraulique génér., const. hydraul. et méc. des fluides
Pirotton, Michel ; Université de Liège - ULiège > Département Argenco : Secteur MS2F > Hydrodynamique appl. et constructions hydrauliques (HACH)
Language :
English
Title :
An efficient global methodology for hazard analysis of dams complexes and cascades
André, J.S., B.J. Dewals, M. Pirotton & A. Schleiss, Quasi 2D-numerical model of aerated flow over stepped chutes, in Proc. 30th IAHR Congress, J, Ganoulis and P. Prinos (eds). Vol, D. 2003, IAHR: Thessaloniki, Greece, p. 671-678,
Archambeau, P., Contribution à la modélisation de la genèse et de la propagation des crues et inondations. 2006, PhD thesis, University of Liege.
Dewals, B., P. Archambeau, S. Erpicum, T. Mouzelard & M. Pirotton. Coupled computations of highly erosive flows with WOLF software. in Proc. 5th Int. Conf. on Hydro-Science & - Engineering. 2002. Warsaw, Poland.
Dewals, B., P. Archambeau, S. Erpicum, T. Mouzelard & M. Pirotton, Dam-break hazard mitigation with geomorphic flow computation, using WOLF 2D hydrodynamic software, in Risk Analysis III. 2002, WIT Press.
Dewals, B., Une approche unifiée pour la modélisation d'écoulements à surface libre, de leur effet érosif sur une structure et de leur interaction avec divers constituants. 2006, PhD thesis, University of Liege: 636 p.
Dewals, B.J.P. Archambeau, S, Erpicum, S. Detrembleur & M. Pirotton. Comparative analysis of the predictive capacity of breaching models for an overtopped rockfill dam. in Proc. Int. Workshop "Stability and Breaching of Embankment Dams". 2004. Oslo, Norway.
Dewals, B.J., S. Erpicum, P. Archambeau, S. Detrembleur & M. Pirotton, Depth-integrated flow modelling taking into account bottom curvature. J. Hydraul. Res., 2006. 44(6): p. 787-795.
Dewals, BJ., P. Archambeau, S. Erpicum, S. Detrembleur & M. Pirotton, Sensitivity analysis of the peak outflow induced by the breaching of embankment dams, in 14. Deutsches Talsperrensymposium & 7th ICOLD European Club Dam Symposium, P. Rutschmann (ed). Vol. 115. 2007, Technische Universität München. p. 86-92.
Dewals, B J., S. Erpicum, P. Archambeau, S. Detrembleur & M. Pirotton. Analysis and application of two complementary numerical models for predicting flood waves generated by failures or dysfunctions occuring on a complex of dams, in Proc. 32nd IAHR Biennial Congress - Harmonizing the demands from art and nature. 2007. Venice, Italy.
Dewals, B.J., S.A. Kantoush, S. Erpicum, M. Pirotton & A.J. Schleiss, Experimental and numerical analysis of flow instabilities in rectangular shallow basins. Environ. Fluid Mech., 2008 (accepted).
Dewals, B.J., S. Erpicum, P. Archambeau, S. Detrembleur & M. Pirotton, Numerical tools for dam break risk assessment: validation and application to a large complex of dams, in Improvements in reservoir construction, operation and maintenance, H. Hewlett (ed). 2006, Thomas Telford: London, p. 272-282.
Erpicum, S., P. Archambeau, B. Dewals, S. Detrembleur & M. Pirotton. Computation of the Malpasset dam break with a 2D conservative flow solver on a multiblock structured grid, in Proc. 6th Int. Conf. of Hydroinformatics. 2004.
Erpicum, S., Optimisation objective de paramètres en écoulements turbulents à surface libre sur maillage multibloc. 2006, PhD thesis, University of Liege.
Marche, C., J. Gagnon, T.-T. Quach, R. Kahawita & P. Beauchemin, Simulation of dam failures in multidike reservoirs arranged in cascade. J. Hydraul. Eng.-ASCE, 1997. 123(11): p. 950-961.
