I quite like the water going directly by the grass, gives a fantasy-styled look to it. Also, it could be a bog.
Now you've added the deeper water, you need more colours to smoothen the transition. Also, i wouldn't make the deep water that dark, but as Sherman said, lower the saturation slightly. Perhaps add a greenish tinge to it aswel.
The grasses look very nice. I'd try not to overuse the long grass though..