(I didn't test this myself, in fact I don't know if it is already a feature; so in case that this feature is already in the game please tell me so I can erase the post) Something that could be a cool implementation would be irrigation circuits that would be build near water bodies. This could be kinda useful; the irrigation canals could be build 5 or 6 tiles away from an X water body, "automating" the watering of your crops, but this means that you need to settle down near the X water body or travelling all the way to your crops to examine that they weren't destroyed or infected.