Tidal Prism of Equilibrium Inlets

by Muthusamy Krishnamurthy, (M.ASCE), Engr.; Toups and Loiederman, Rockville, Md.,

Serial Information: Journal of the Waterway, Port, Coastal and Ocean Division, 1977, Vol. 103, Issue 4, Pg. 423-432

Document Type: Journal Paper


Tidal prism is defined as the volume of water discharged through an inlet from ebb to flood tide. The magnitude of tidal prism depends on the cross-sectional area of the inlet. When an inlet is in equilibrium, many investigators have established a relationship between the two parameters. In this paper, a formula has been derived to estimate the value of tidal prism of an equilibrium inlet taking the range and period of the ocean tide, flow resistance of the channel, and the size of the bed material of the inlet into consideration. This formula has been compared with the available formulas and verified using data of existing equilibrium inlets.

Subject Headings: Tides | Prism | Equilibrium | Inlets (waterway) | Water discharge | Flow resistance | Bed materials | Floods

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