Use the natural flow of water like a paint brush moving across an artist's canvas to create a sense of motion and mix colors in visually stunning ways!  The colors in this photos palette are natures that include red, orange and gold from reflected fall foliage and blue reflected from the sky above that are blended together during long exposures.

Use shutter speeds of 1/2 to 1 sec in length and a tripod setup for these kinds of photos.  Partly cloudy days and a little shade are best to prevent hot spots of glare in the water and the use of a polarizing filter will help bring out the full range of color detail.