By Christopher A Williston (Oskarbaybiker) on Friday, May 3, 2013 - 10:14 am:
That plus as the water flow velocity increases, it causes more soil erosion. Its a natural phenomena. The Copper River in Alaska has so much turbidity in spring thaw that it will scrub all of the color of a black combat boot to the leather color in under 30 minutes. All from natural soil erosion.