The palette
Water everywhere, and in two tempers: the long soft channel running off the sheet, and the hard rectangles of the docks along its banks. That gives one colour two jobs, and it works. What will not work is expecting the far shore to answer with green, because it barely takes a tint. Read that side as empty rather than wooded, and set your ink so the basins keep their edges: they are the only right angles on a page of curves.