Accession Number : ADA214441

Title :   Estuary Numbers.

Descriptive Note : Final rept.,

Corporate Author : COMMITTEE ON TIDAL HYDRAULICS (ARMY) WASHINGTON DC

Personal Author(s) : Keulegan, Garbis H.

Report Date : SEP 1989

Pagination or Media Count : 53

Abstract : One of the important contributions of the analysis of salinity tests conducted at the US Army Engineer Waterways Experiment Station (WES) has been the concept of the stratification number G/J where G represents the dissipation of energy in channel waters per unit mass and J the increase of potential energy of fresh water due to mixing per unit mass. Salinity distribution in the vertical and dispersion are dependent on the salinity stratification number. For co-oscillating tides a linear theory of damped oscillations have been developed involving the friction characteristics of channel boundaries. This, however, is ignored in favor of experimental determination of a damping coefficient which is necessary to evaluate G/J. This matter is fully developed and explained. An examination of data from WES salinity tests reveals the existence of an estuary number E (S1), which is related to G/J. Thus E(S1) is equally applicable like G/J to characterize salinity variations in the cross sections and diffusion. An experimental procedure for tests to verify the applicability of the ratio of the difference of the salinities in the uppermost and lowest layers and the average salinity over depth to describe salinity distribution is briefly mentioned. Keywords: Dimensionless numbers; Estuaries; Stratified flow. (AW)

Descriptors :   *ESTUARIES, *SALINITY, BOUNDARIES, CHANNELS(WATERWAYS), COEFFICIENTS, CROSS SECTIONS, DAMPING, DEPTH, DISPERSING, DISSIPATION, DISTRIBUTION, ENERGY, WATER FLOW, FRESH WATER, FRICTION, LINEARITY, MASS, NUMBERS, OSCILLATION, POTENTIAL ENERGY, RATIOS, STRATIFICATION, TEST AND EVALUATION, THEORY, TIDES, VERTICAL ORIENTATION, WATER.

Subject Categories : Hydrology, Limnology and Potamology

Distribution Statement : APPROVED FOR PUBLIC RELEASE