I hope you will be receptive to my observations and suggestions.
First, the colour you have now is not right, but also it doesn't indicate any shift of light and depth.
What I did for my water was to paint a sealing base, in my case some wood putty that was so gooey it could be spread easily to seal any cracks. Once it cured, I painted it with a mixture of medium green and grey, even some brown thrown it, and painted the middle 2/3 of the surface from the center point outward toward the banks. When it dried, I lightened it by not adding any dark, and blended that toward the banks.
Over the dried surface, I then poured my water medium, but this time dyed with a single drop of Hauder Medium Green craft paint from Wal Mart's craft section, and a half-drop of yellow. I added a pinch, maybe 1/8 tsp of Plaster of Paris powder for turbidity. I poured two layers, letting each dry covered by stiff cardboard to keep out dusty and hairs.
(Use a soda straw in your mouth to gently blow at any bubbles that you see after the first three minutes. Also, you can spread every pour using a throw away scrap of clean wood. It usually means two or more pours as a result...NO LARGE POURS!)
To create the realistic water surface affected by eddies, currents, and wind drifts, I painted the top surface with a thin layer of gel gloss medium, and then turned the brush on its side and stippled that gloss medium.
This is the result indoors the first time I did this process.
Recently I built a small diorama for outdoors photography, and did much the same thing. Here is what it looks like in sunlight. This is a real shot outdoors, but the diorama with tracks and engine is all HO scale, including the Atlas Warren Truss bridge, scratched abutments, and the fake river.