How do I get the rope from the dead man

Hint 1 of 12:

You'll need to bring him down to your level.

Hint 2 of 12:

Maybe if the river bed wasn't dry, it would be easier.

Hint 3 of 12:

Something is keeping the water from flowing to the river bed.

Hint 4 of 12:

The dam at the river fork must go.