  In this paper we analyze the convergence of the splitting method for shallow
water equations. In particular, we give an analytical estimation of the time
step which is necessary for the convergence and then we study the behaviour of
the motion of the shallow water in the Venice lagoon by using the splitting
method with a finite element space discretization. The numerical calculations
show that the splitting method is convergent if the time step of the first part
is sufficiently small and that it gives a good agreement with the experimental
data.
