Geodesic
Variable depth KdV equations and generalizations to more nonlinear regimes
ESAIM: Mathematical Modelling and Numerical Analysis , Tome 44 (2010) no. 2, pp. 347-370

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We study here the water waves problem for uneven bottoms in a highly nonlinear regime where the small amplitude assumption of the Korteweg-de Vries (KdV) equation is enforced. It is known that, for such regimes, a generalization of the KdV equation (somehow linked to the Camassa-Holm equation) can be derived and justified [Constantin and Lannes, Arch. Ration. Mech. Anal. 192 (2009) 165-186] when the bottom is flat. We generalize here this result with a new class of equations taking into account variable bottom topographies. Of course, many variable depth KdV equations existing in the literature are recovered as particular cases. Various regimes for the topography regimes are investigated and we prove consistency of these models, as well as a full justification for some of them. We also study the problem of wave breaking for our new variable depth and highly nonlinear generalizations of the KdV equations.

DOI : 10.1051/m2an/2010005
Classification : 35B40, 76B15
Keywords: water waves, KdV equations, topographic effects 
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     author = {Israwi, Samer},
     title = {Variable depth {KdV} equations and generalizations to more nonlinear regimes},
     journal = {ESAIM: Mathematical Modelling and Numerical Analysis },
     pages = {347--370},
     publisher = {EDP-Sciences},
     volume = {44},
     number = {2},
     year = {2010},
     doi = {10.1051/m2an/2010005},
     mrnumber = {2655953},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.1051/m2an/2010005/}
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Israwi, Samer. Variable depth KdV equations and generalizations to more nonlinear regimes. ESAIM: Mathematical Modelling and Numerical Analysis , Tome 44 (2010) no. 2, pp. 347-370. doi: 10.1051/m2an/2010005

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