Isotache

An isotache (from the Greek isos 'equal' and tachys 'speed') is a line of equal speed . These can be lines with the same wind speed on a weather map or lines with the same flow speed in the cross section of a watercourse .

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  Wind peaks in m / s, the color boundaries here are isotachines (at +3 m / s each; KMNI, July 25, 2015 )

Web link

• Isotache on geodz.com; Retrieved April 4, 2013