Realistic swamp water

Google didn’t help me on this one, so I’m hoping the forum might. It’s for a fluid simulation, but my only concern is the materials part. I’m wondering how to make realistic swamp water. The type that’s slightly transparent at the top but dense green deeper down, and has leafs and dirt floating on top of it. Curious for both Blender Render and Cycles. Any tutorials out there? Some real life images of what I’m aiming for:Image 1, Image 2, Image 3.