Question: contour plot in the specified boundary.

I am trying to plot a contour graph for my problem for (psi) function in the particular boundary, and even though it's working, but the contour  plot is not appearing at the end. Could anyone help me with the code to get proper graph in the specified boundary. 

i have ploted the graph in python i got a plot similar to that i am trying maple but i am not able to plot it. could any one help me to solve.

contour_plots_error_in_wavey_flow.mw

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