Hydrology Terminology

Watershed

Streamflow

-cross-section area

-Manning’s “n”

Routing

Reservoirs

Channel

Precipitation

Snow

Runoff

Infiltration

Unit hydrograph

Timing

Flooding

Flow

Grade lines

Land Use

Frequency

Manning’s “n” is a measure of the roughness of a surface, and in streamflow it is the roughness of the channel bottom and it’s sides.

Diagram 2 will have a higher Manning’s “n” because it has rougher surface due to the jagged bottom and pebbles.