[Tagging] Drafting proposal: use oneway=reversible or create tag?

[David Marchal]

Hello, there.
I'm drafting a proposal concerning some waterways whose flow regularly changes direction, which happens near some sinkholes named estavelles, which drain or feed water according to the aquifer level. I would consequently propose a way to map it, but it should be consistent with current tags, so I wondered: should I propose using
oneway=reversible, as it already exists and can be used on other ways than roads, according to the wiki, but would in this case be used to indicate that something is _not_ oneway, oranother tag, such as twoway=yes, which could be clearer in this context of a way you would expect to be oneway, but at the risk of duplicating the use of oneway=no?
Hoping you can help,
Regards.
 		 	   		  
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