In some areas, grey or white water can be a result of natural processes such as glacial sources for streams. The variety of flow in relation to depth creates habitat to support fish and invertebrate life. This variety can be seen by looking for pools and riffles. Pools are deeper than adjacent areas. They provide feeding, resting and spawning areas for fish.
Riffles are shallow and fast water, runs are deep and fast water and pools are slow and deep water.
Stream Channel Cross-section Shape Please check the box which matches the shape of the stream channel. If you are unable to see the shape of the bottom and banks, please estimate. You can base your estimate on the flow of water. The slower the water in the middle of the stream, the flatte the bottom. The particles are fine.