Hmm.. Sadly not sure what fjord that is, but it reminds me of
Sognefjorden, Norway's deepest/ longest fjord. Anyway. What Norwgian fjords looks like in general, including Sognefjorden:
1 -
2 -
3 PS: It's a fjord called Nordfjord, my "home fjord", an area I live in in the summer. And sorry I can't help keeping myself from promoting our landscape. xDThose pictures might be a good guidance for biomes. But it also shows clouds getting caught by the mountain, making it rain quite often, filling lakes, which again makes rivers. Could clouds be programmed to affect the this? Well, the coding for making rivers will be a quite difficult thing, I guess. If rivers were made by looking for fjord formations or similar, Grand Canyon would be one huge river... The team behind the engine has already come a long way, though, so why not longer.
In quite near future, all *water will be particles anyway, making enough rain create rivers:
*Demo is done with Nvidia's PhysX, realtime.