> 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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