Kwai ? No ! Its Godavari, in AP, India. I was here last weekend and got a chance to go on the famous boat ride. The boat ride to Papikondalu is 60kms. We got on the boat at around 930AM and came back at around 8PM. ( Breakfast and lunch included. )
The tents in the pic here is made of bamboo. There is one package tour with AP Tourism that lets you stay in those tents. And yeah, no electricity, fear of a sudden flood, all this are a part of the adventure. Not sure if it really floods though.
There are villages on both sides of the river. Many of them totally unexplored. Some of them have to use the river for daily transport. So their daily Merc is actually a boat