Hydrology Terminology

Watershed

-drainage area

-drainage basin

-sub-basin

-sub-area

Streamflow

Routing

Reservoirs

Channel

Precipitation

Snow

Runoff

Infiltration

Unit hydrograph

Timing

Flooding

Flow

Grade lines

Land Use

Frequency

• A watershed is an area of land that drains to a single outlet and is separated from other watersheds by a divide.

• Every watershed has a drainage area.

• Related terms: drainage basin, sub-basin, sub-area.

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