The exact thought behind my question was that I was wondering if the west-east river between the enclave and the bazaar would play a role in trade/transportation, or if it would be too small for that. (and subsequently: if it would be of any interest to the citizens of that city to build a channel or something at the thinnest chokepoint around the bazaar)
Yes, I thought it isn't deep and wide enough for seafaring ships, but for transporting boats it is fine. This is one of the reasons why I thought the best point for a settlement would be there, you can reach far into the land from this point. Having a little lake there to have the place to shift wares is also a big bonus. =)

Finally I get to see you do a work in progress! It looking great so far, I especially like the landshapes. I will surely keep an eye on this one!
Thanks Daniël! I really am excited where this goes, too