[Tagging] waterway=wadi problem

[Warin]

On 21/01/2015 10:03 AM, tagging-request at openstreetmap.org wrote:
> Date: Tue, 20 Jan 2015 14:43:16 +0000
> From: Lukas Sommer<sommerluk at gmail.com>
> To: "Tag discussion, strategy and related tools"
> 	<tagging at openstreetmap.org>
> Subject: Re: [Tagging] waterway=wadi problem
> Message-ID:
> 	<CAFTrL-2fWKpTY-8RNU_0Qa7-gq6=9G3arS2JwOnt=5DQfOTnKg at mail.gmail.com>
> Content-Type: text/plain; charset=UTF-8
>
>> >The flood prone areas are not designed to let you cross a river
> Yes. I think that is exactly the important point and a very good
> description/criterion. flood_prone=yes for things that are_not_
> designed to be flooded.

No! Flood prone means that they are expected to be flooded from time to 
time. Nothing about the design. I'd hope that the flood_prone tag would 
be applied to an area, and best if the frequency is noted e.g. once 
every 100 years.

> And waterway=*, ford=* … for things that_are_
> designed/expected to be flooded.

Again no. A ford may be continuously under water. E.G. a road that goes 
through a river .. where the river normally flows across the top of the 
road.  Some fords may only have water in floods, others seasonally, and 
others continuously.
> Lukas Sommer

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