Excitation (and response) period [time]

Vessel draft [length]

Wave period [time]

Resonant period for Helmholtz mode (Equation II-7-18)[time]

Axial tension or load on a mooring line [force]

Natural free oscillating period (n, m is the number of nodes along the x- and y-axes

of a basin [time]

Undamped natural period of a vessel (Equation II-7-26) [time]

&

Average horizontal velocity at a node (Equation II-7-16) [length/time]

Wind speed at the standard elevation of 10 m above the water surface [length/time]

Average current speed [length/time]

Maximum horizontal velocity at a node [length/time]

Return flow velocity (Equation II-7-25), velocity that develops between the vessel

hull and the channel bottom and sides [length/time]

Vessel speed [length/time]

Wind speed at elevation *z *[length/time]

Breakwater's characteristic dimension in the direction of wave propagation [length]

Channel width [length]

Maximum horizontal particle excursion at a node in a standing wave (Equation II-7-

15) [length]

Vertical extent of the barrier below the still-water surface [length]

II-7-90

Harbor Hydrodynamics

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