[Tagging] Rivers classification

[Richard]

On Sun, Aug 06, 2017 at 11:26:23AM +0200, Daniel Koć wrote:
> I was thinking about better rendering rivers on medium and low zoom levels
> of osm-carto and I've found that we lack any classification of them -
> anything bigger than stream is just a river.

as of rendering, respecting river width and doing something reasonable
with intermittent flows would be a great progress.
Iirc the stream order issue has been brought up on some talk page
previously.

Also had a look at natural=riverbed which at this stage has some
problems.

Richard