Try This For Fun

Here is a fun technique to try that I found on Gordon MacKenzie's "The Watercolorist's
Essential Notebook:  Landscapes" DVD
You need a hogs hair bristle brush which you can get at the hardware store and
a household sponge that you have torn a small piece from

First lightly drag the wet hogs hair brush vertically down the paper so that
the water leaves a "lacy" pattern.  Next, using your piece of sponge, drop
pigment and let it move where it wants.  Let this dry, you can hasten the process
by using a hairdryer 

With a small brush add whatever branches you think you need in the "forest"
Soften the bottom edge by gently dragging a soft, dry brush across.
Wet your hog bristle brush again, dragging it across the paper horizontally
 Drop in darker color to create the water.   Soften the edges as above.

Again, let it dry completely
Add some soft lines with a small brush, softening the edges
to indicate the topography.  Next add foreground trees .
 

This is a second attempt.  I found that it takes practice to get the right amount of
water on the paper.