ABSTRACT
zero concentration while the sides are specified as no-flux boundaries. The depth of the estuary is taken as unity. The grid sizes, ~x and ~y. are both 3050 m whilst the time step ~t - T/24. Starting from C(x,O) - 0, the computed steady state reached in about 90 cycles is essentially described by an equilibrium concentration profile which oscillates up and down the channel with the phase of the advective flow.
