PREDICTION OF THE HEIGHT OF TIDAL DUNES IN ESTUARIES

Horst Nasner

Abstract


In this paper prototype data of echo soundings of tidal dunes are analysed. A good relation between the fresh water discharge and the sand wave migration velocity in the upper part of a tidal river could be determined. The limitation of the dune heights as a function of the mean current velocities over the crests and the bed material characteristics is presented. States of equilibrium are described by dimensionless parameters and the latter compared with model tests.

Keywords


tidal dune; estuary; dune height; dune

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