sinu

Channel sinuosity

Channel sinuosity is a measure of how much a river or stream channel deviates from a straight line between two points. It is calculated by dividing the length of the channel by the straight-line distance between its endpoints.

For rivers, the conventional classes of sinuosity are:

Sinuosity	Channel Form
< 1.05	almost straight
≥ 1.05 - < 1.25	winding
≥ 1.25 - < 1.50	twisty
≥ 1.50	meandering