First of all, I think your diagram and brochure are looking great!
Adrian made some really good comments. I have just a couple of (also pretty pedantic) comments.
I agree that you need to make the four colors consistent between the diagram, and the rest of the brochure. I prefer the four colors used in the diagram ? the yellow and the green used in the brochure are a bit too ?neon? for me. Also, if you go to Adobe?s Studio Exchange website (http://share.studio.adobe.com/
), there are a bunch of swatch palettes you can download for free, which have some cool colors.
I think the zone labels ?low marsh? etc, and the zone descriptions ?regular inundation? etc, need to be centered within the zone.
The top of the diagram can be cleaned up, also with the knife tool ? some of the colored boxes are taller than the others.
I would stick with sentence capitalization throughout the diagram and brochure ? just capitalize the first word, and use lowercase for the rest of the sentence or description.
Should the diagram label ?Landward limit of tidal marsh? be located in the Salt Panne zone, seeing as the Upland marsh doesn?t contain any tidal marsh?
The zone description for Salt Panne ? maybe put a comma after ?inundation?? Otherwise it sounds like it is infrequently inundated with salt.
In the brochure, make sure the annotated drawings are lined up with each other horizontally and vertically (actually, that goes for all the elements).
Hope this helps! Looking forward to seeing the final version!