2π*t*

(II-6-9)

and bay tide can be represented as (see Figure II-6-17)

2π*t*

&ε

(II-6-10)

where g is phase lag, *a*b is bay tide amplitude (one-half the bay tide range), *T *is tide period, and t is time of

interest during the tide cycle. Also King's *K*1 and *K*2 are related to the Keulegan repletion coefficient *K *by

1

1

(II-6-11)

(1) The volume of water that enters through the inlet channel during flood flow and then exits during ebb

flow is known as the tidal prism. If the hydraulic analysis as described above is used, then tidal prism *P *can

be calculated as

(II-6-12)

(2) Another technique for prism estimation can use observed velocity (or discharge *Q*) data. Assuming

a sinusoidal discharge in the channel and integrating over the flood or ebb portion of the tidal cycle

/

(II-6-13)

π

π

Hydrodynamics of Tidal Inlets

II-6-13

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