Redrobes pointed me to this thread. I have just finished a PhD in Hydrology so i might be of some help with questions. I am not a geomorphology or classification specialist (which looking through this thread is mostly what is being discussed) but i know more than most.

" The delta area is probably too large with regard to the river's length. I justify this by saying that the tectonic rising of the subcontinent of Pytharnia has forced the great discharge of the Shadew River to make new channels over many tens of thousands of years, so the river cuts down as the earth rises up. The Shadmouth, or mouth where the Shadew River enters the delta is easily over two kilometers wide. The nation of Bangladesh is striped with the braids of the Ganges River, however, it is relatively flat."

noticed this. Deltas are generated by deposition of sediment. The river loses energy as it reaches the sea (moving water hitting water moving in a different direction) so it dumps its load of sediment. This creates lots of extra soil that the river still has to cut through to reach the sea, so you get lots of little channels. Delta size is a function of how much sediment it is carrying rather than its length or even the amount of water (although a longer river with more water will generally have the ability to carry more sediment).

If you have a large delta a couple of things should be true. First, the river should look brown, as its carrying loads of soil. Secondly that soil needs to be eroding from somewhere. Eroded soil can come from lots of places. It could be that the river has eroded deep gorges, or that hard seasonal rainfall just washes the top soil off the great plain each year. A river with a lot of soil in it will typically be lower energy, move slowly and meander a lot, but there might be exceptions to this (the Nile doesn't meander excessively for instance in its lower reaches).

hope this helps.

I have also studied geography as an undergraduate and in general know stuff about the earths features.