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Glossary W

water column

The portion of a body of water between its surface and its bottom (substrate) commonly used to describe a fish's location.

water quality

The physical, chemical and biological components of a lake, reservoir, or stream, and the level of degradation to each of these components.


A ridge of high land dividing two areas that are drained by different river systems. Also called water parting.

The region draining into a river, river system, or other body of water.