Hi Andreea - welcome back to the Critique Gallery
It's been a while since you were last in here, but hopefully between us all we'll be able to give you some useful feedback on this image.
First of all, I really do like it. There's a wonderfully calm serenity about it, and the distant light through the trees is quite magical. You say you wanted to capture mood and seasonal change, and although I think your image does this very well, there's a few things that I think you could do to push that feeling even further.
The first thing I want to dp is crop the image to get rid of that blockwork concrete on the right hand side. Although it serves to anchor the other side of the bridge, part of me wants to leave the viewer wondering where it goes, so in my Mod I've cropped this out. I've also cropped slightly from the left as well, so that the point where the bridge turns and goes upwards is on a third (the Rule of Thirds principle). For me, this particular point is a pivotal one, as it's reminiscent of change, which is what your image is about - change in seasons; change in perspective; change in height, perhaps? Ascension, if you like
I've done one or two other things in my Mod as well (I use Photoshop, by the way). I've increased the contrast throughout the image, to give a much more moody feel. I did this a really easy way, using a black and white adjustment layer. This may sound odd at first, as my Mod isn't in black and white ... BUT, use a B&W adjustment layer and then set the blend mode to Soft Light. This immediately adds contrast, but also leaves the colour intact as well. I then just played with the sliders a bit, moving the Red one to -13, the Yellow one to -7, the Greens to 18, and the Cyan and Blue sliders all the way to the left to -200.
This has effectively deepened a lot of the warm tones in the image, and hopefully gives it much more drama and impact.
The other thing I did (badly, admittedly, but hopefully it'll illustrate the point) was to take the front portion of water and apply a motion blur to it, and change the angle so that it sort of goes in the right direction
I wanted to really try and capture the sense of movement set against stillness, as you say in your description. An easy way at the taking stage would have been to use a slower shutter speed to capture that movement, and although you used 1/30th, you could probably have gone a bit slower too.
Hopefully you'll like what I've done in my Mod. It is, admittedly, a bit different and darker than your original image. Both have their merits, though - for example, your original has a lightness and softness that my Mod has diminished, mine has richer colour that yours doesn't. It's just another way of looking at the same scene