I would think using the thalweg-principle is only
for wide rivers where navigation is possible and normal. Probably more
often outside Europe where small rivers would be used for navigation as
well. This makes navigation possible for both countries.
For smaller water courses I am sure the middle line is the general
rule.
And how to know where the thalweg is? I guess people navigation know.
Otherwise onless the countries have problems with one another it's not an issue
untill something happens. Just like land borders with poor demarcation: Nobody
really cares (only freaks) untill it is necessary to find out, with the help of
surveyors etc.
Jesper
> THALWEG
> 1. «A German term, literally "downstream,"
with reference to
river
> navigation. Here referring to the deepest
channel in a river,
genereally the
> most suitable channel for
navigation at the normal lowest
water level.»
> (Biger, p.
522)
>
> (How to find the deepest channel in a 5 metre broad
river?!?)