[Tagging] Modelling the relation between a waterstream and one of its resurgence

[Jo]

I would say that we need a new type of relation for that.

Jo

2015-09-09 17:25 GMT+02:00 David Marchal <penegal at live.fr>:

> > map the underground stream if possible.
>
> As I don't know where the intake from the first stream is, I think I can't
> map it this way. Besides, wouldn't that make the link exclusive, i.e. tell
> that the water only comes from one point and exits at another? If so, I
> can't either, as no-one can be sure of that in karstic systems: you can be
> sure that a ponor feeds a spring, but not that only this single ponor feeds
> only this particular spring, as there can be other ponors feeding this
> spring, and other springs fed by this ponor.
>
> Anyway, I can remember of some locations where a stream is known to be
> undergroud, and that it is the same stream all along, running underground
> below its dry bed during summer and filling it only during winter, so that
> will be useful.
>
> > If mapping the underground stream is not an option use the quite normal
> > relation waterway.
>
> The problem is that the resurgence is renowned as a separate river, even
> if the link with the losing stream is well known, and those rivers both has
> their waterway relation. How can I map the link without messing with the
> separate waterway relations ? By creating a super-relation ? I don't want
> to FUBAR the data.
>
> Regards.
>
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