Merian's formula

Merian's formula

[′mer·ē·ənz ‚fȯr·myə·lə]
(oceanography)
A formula for the period of a seiche, T = (1/ n) (2 L /√(gd)), where n is the number of nodes, L is the horizontal dimension of the basin measured in the direction of wave motion, g is the acceleration of gravity, and d is the depth of the water.