Whitewater, Tenaya Creek. Yosemite National Park, California.June 28, 2010. © Copyright G Dan Mitchell – all rights reserved.

Turbulent whitewater flows through an area of steep granite along Tenaya Creek, Yosemite National Park.

You can, of course, find a place to shoot subjects like this one all over the Sierra and no doubt in many other places as well. This photograph was made during a period of relatively high water early in the season and in a spot where the water flowed over some rocks in shade. Sunlight on the other side of the stream reflected into the water and revealed highlights, especially the flying spray that I allowed to blur with a somewhat slow shutter speed.

The moving water in Sierra streams and rivers seems to be an almost irresistible subject for many photographers, and I confess that I count myself among them. In some ways it is almost too easy to make these photographs, and one basic requirement is a willingness to make quite a few exposures. The instantaneous motion of the water and the reflections of light simply cannot be controlled or predicted, so one almost has to make many, many exposures. Of course, there is a bit more to it than pointing the camera at water and then repeatedly pressing the shutter release. It is important to find some sort of compositional interest first – it could be where water flows around or over a rock, a place where the light catches the water, or possibly just the twisting forms of turbulent water. Light is extra important in these photographs I think – most often the colors come from a combination of the blue-green shades of water full of foam and from reflected light from things that are out of the frame. (In this photograph, the light mostly comes from sunlight reflected off of granite on the far side of the stream.) Shutter speed is an important consideration, as a short exposure will stop or nearly stop the water and freeze the motion, a somewhat longer exposure can hold some detail but still allow blur along the direction of the flow, and very long exposures can create a misty and diffuse effect.

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