Here I have taken a section of another plan, focussing on a reedbed and bridge of a SUDs.
Using Marx’s style, I have created my own interpretation.

I have used Lyra pencils here in bold single-colour blogs. Maybe utilising Photoshop bucket fill would have been a better alternative to get clean colours. The dark blue may also have been better in a lighter tone from afar; it merges with the green and dark black lines. However, the dramatic colour blocks still work and portray suggestive sites similar to Marx’s.