[Tagging] Flood prone areas - link to measurement stations

[Andy Townsend]

Hello,

There are a few tags already in use for flood-prone areas (see 
https://taginfo.openstreetmap.org/search?q=flood ), with 
https://taginfo.openstreetmap.org/tags/flood_prone=yes being the most 
common.

However in the UK and I'm sure in lots of other places there is a 
network of monitoring stations on rivers, such as here: 
https://www.openstreetmap.org/node/8373389773 .  There are lots of them:

https://flood-warning-information.service.gov.uk/river-and-sea-levels?location=york

It's possible to estimate when a particular location on a river will be 
flooded based on the downstream (and to a lesser extent upstream) 
monitoring station level.  Has anyone considered linking these together 
in any way?  So far I've added a note on e.g. 
https://www.openstreetmap.org/way/37535250 to say "When 
https://www.openstreetmap.org/node/8373389773 says 2.7m, flooded here", 
but some more formal way of saying that would make sense. I can happily 
invent something, but don't want to do that if an existing tagging 
already exists.

Best Regards,

Andy