[Tagging] Ford and other river crossing : (was : waterway=wadi problem)

[Eric Sibert]

My apologize for switching the discussion (so I change the title  
accordingly) and also for slowly answering.

First, I was not aware of depth=* use recommendation with ford=yes  
although it is in the wiki for years.

Let me back to Madagascar. We have:

- unpaved road crossing permanent river without specific equipment
ford=yes
surface=unpaved
depth>0

- unpaved road crossing permanent river with specific equipment  
(usually made of concrete, "radier" in French, not sure on the correct  
term in English: raft???)
ford=yes
surface=paved/concrete
depth>0

- unpaved road crossing intermittent river without specific equipment
ford=yes
surface=unpaved
depth=0
May we use intermittent=yes/seasonal/flood/winter... to indicate  
period/frequency submersion?

- unpaved road crossing intermittent river with specific equipment
ford=yes
surface=paved/concrete
depth=0
intermittent?

- paved road crossing permanent river (of course with specific equipment)
ford=yes
surface=paved/concrete
depth>0

- paved road crossing intermittent river
ford=yes
surface=paved/concrete
depth=0
intermittent?

Do we have also to use flood_prone=yes or (ford=yes / depth=0) already  
imply that it is subject to flooding?

I don't like the wiki page on flood_prone. It is telling that the main  
difference between ford and flood_prone is the danger aspect. Indeed,  
looking at illustrations, especially at the third one, I just see a  
regular ford with depth scale and so on.

I have one last case: some low profile bridge (without parapet) may be  
submerged after heavy rain but may be still usable if water depth  
above the bridge in not too high. How to tag this?



Eric