Hydrologic function,

Hydrologic function, as used in 780.28, 784.28, 800.42, 816.57, and 817.57 of this chapter, means the role that streams play in the transport of water and the flow of water within the stream channel and floodplain. The term includes total flow volume, seasonal variations in streamflow and base flow, and provision of the water needed to maintain floodplains and wetlands associated with the stream.

Source

30 CFR § 701.5

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Scoping language

As used in this chapter, the following terms have the specified meanings, except where otherwise indicated:

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