  In this paper, we present a deduction of swallow water equations in the
presence of vegetation based on spatial averaging techniques starting from the
general principles of conservation of mass and momentum. For this purpose, we
worked in the hydrostatic approximation of the pressure field and we considered
certain hypotheses of kinematic and topographical nature and assumptions on the
structure of the vegetation. Some elements of differential geometry necessary
to facilitate the reading of the paper can be found in the Appendix.
