Second photo is OK.
I think the movement of the water is captured pretty good, this give some dynamic to the photo.
The vertical landscape is very hard to do, but if you get lucky this vertical photo might be one of your best landscape ever.
You have to be careful not to divide the image in half.
This is landscape photography, sometimes you find something beautiful , something you know that looks good but camera does not, you have to compose it very carefully and make sure you emphasizing what you like and hiding what you do not like.
Here are couple tips;
Landscapes with water, use the polarization filter, this will help you to control the light reflection. If you like what you see through the water show it, if you like the white reflection in the water turn the polarization but be careful, reflection in the water with most likely come out overexposed.
As Far as composition.
I would come closer to the big rock, get lower so the rock would take about 30% of the photo.
That way we will have 30% big rock, %40 water, and hopefully you could expose a little bit more sky.
I might be wrong maybe you do not have to lower te camera, maybe just bring it up.
Point of view of the camera is very important.