Summer Feeling

The overall calm vibe I get from this photo corresponds with the way it has been devided into two symmetrical parts: the mountain scene at the top and its reflection at the bottom.

The colours serve that calmness well with blue and green being cold & soothing. The contrast on the other hand seems a bit overdramatic. The hills to the left appear almost black against the white of the sky there. You could've avoided this by doing one of the following things provided the shadow/light situation didn't come from post-processing (you'll have to decide for yourself if these options would've been practical):
1) choosing a different spot to take the picture from, so that the sun isn't in the way that much
2) choosing a different time of day for the shot
3) if you shoot in RAW format, you can "save" quite some pictures during post-processing

All in all, the shot is technically a good one if you leave out the overexposure of the sky, but it doesn't really "speak" to me because the message and the technique don't quite fit together. A calm picture with contrast and such sharp yellow (warm & vital colour) highlights as yours exhibits would need a more dynamic subject matter or at least a more dynamic division (thirds instead of halves for example, assymmetrical instead of symmetrical,...)