The water has blown highlights,so too are the foreground rocks. What i mean is, you exposed for the Green/Dark part of the scene. The camera then see's this as "dark" and it gives you an exposure that will make the green "OK" at the loss of the brighter parts of the scene. So the areas that the actual light is falling on (the water and the top of the rocks) become over exposed. The trick is to balance all the areas, you could take a few shots at different settings. Learn to use the Histogram , if you check out this image you will find its to the right of the histogram, which means you have the whites overexposed.
Edit: Forgot to mention, you were shooting into the sun, which makes it more difficult
Nothing that photoshop cant fix.