Laboratory Investigation of Tidal Inlets on Sandy Coasts.
Abstract
Experiments were conducted on a fine sand barrier separating two 1-foot-deep basins representing an ocean and a 94- by 64-foot bay. Pilot channels with varying geometric characteristics were cut through the barrier to communicate the basins and thus create an ocean-inlet-bay system subsequently subjected to ocean tide and wave action. Measurements were made of cross-sectional areas, water surface elevations at ocean, bay, and inlet, and inlet current velocities for a number of cycles (sinusoidal tides) until water surface fluctuations in the bay became periodic for each run. Exploratory studies included runs: with jettied inlets, with 'fresh-water' inflow into the bay, inlets under mild and steep ocean waves, and to determine the effect of model bed ripple orientation on the friction coefficient of the inlet channel. Experimental data are presented in tabular and photographic form, and as plots correlating the various dimensionless hydraulic parameters (e.g., tidal range damping coefficient, bay super-elevation, mean current velocity timelag between maxima and minima, duration of ebbtide) to the repletion coefficient, K, and to a proposed parameter, K(square root F). Results are compared to the basic theoretical solution of the problem by Keulegan (1967) and to an extension of the Keulegan theory (the lumped parameter approach).
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1977
- Accession Number
- ADA040021
Entities
People
- Ramiro E. Mayor-mora
Organizations
- University of California, Berkeley