Balance:

There is a half-way line that cuts the picture in two and because of the reflection I feel that the picture is balanced.

Proportion:

I don’t think that the proportion is good because it is in fourths and I think it should be thirds. I also think the picture is cut in half.

Rhythm:

The river and the clouds give it a flowing rhythm.

Emphasis:

The emphasis in the picture is the river.

Unity:

It’s unified with the river reflecting the sky and the repeat in the greens in the middle and bottom.