I balanced the colors in channels...in addition to using HSB adjustments in the channels, I also used brightness and contrast. For the water, I simply used a PS tool called "Select by Color Range" and used the eye dropper to select only the water using the fuzzy slider and the range slider. I did this as well with the tree colors...it's a great tool to learn to use as is using adjustment layers in your channels dialogue.
Here are some ideas on ways to use selections by color range and channels in HSB and Brightness and contrast.
Select by color Range (highly accurate even though the marching ants are sometimes a bit less looking so.
After making the initial selection, I used the magic wand tool and deleted the ants out of the trees and did a levels adjustment to darken the water
Next I did a green channel selection and an HSB adjustment layer to desaturate some of the greens and yellows though as you will see in the next image, I removed some of the edit with a black brush at about 40% to give some needed highlights back to the BG tree
While I did do some cloning and other adjustments, this last image shows that I used the red channel in conjunction with a Brightness and Contrast Adjustment layer to amplify the red/browns in the tree trunks to the right...later I did the same in the blue channel, eliminating everything but that tree with the magic wand tool to add some brown-ness to the trunks/limbs
This is just a place to start, get used to fiddling about with the tools, learning to work in channels and keep in mind, all the adjustment layer tools can be used in the channels menu...I will often do an HSB on a blue channel, then do a Brightness contrast on the same mask (hold the alt key and put your cursor on the HSB layer mask and move it up until it copies into the B/C layer mask...) fun trick and saves oodles of time.