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A watershed is a unit of land which contributes water to a single drainage. Boundaries for watersheds usually occur on the crests of ridges, where water flow splits in two directions. Watersheds vary in size from the very large, such as the 1.15 million square mile Mississippi River watershed in the central United States, to the very small, such as the less than one square mile Homewood Canyon Creek watershed on Lake Tahoe's West Shore.
The area in the backshore extending from the point where waves first break on the sand to the point that marks their "run-up" onto the sand
Watershed Erosion Prediction Project (WEPP) is a watershed evaluation prediction model.
Large logs or timbers that are driven vertically into the lake bottom. Beneficial Use: Desirable uses that water quality should support. While the Lake Tahoe TMDL is being developed to ensure protection of Lake Tahoe's extraordinary aesthetic value; implementation efforts will also act to protect other uses such as water supply and aquatic life
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