Title

Reconsidering the seawater-density parameter in hydrodynamic flow transport equations for coastal boulders

Source of Publication

New Zealand Journal of Geology and Geophysics

Abstract

© 2020 The Royal Society of New Zealand. Existing hydrodynamic flow transport equations for coastal boulder transport are useful for estimating post-event the characteristics of extreme storm waves and tsunamis. However, the effect of suspended sediment concentration (SSC) on seawater density is normally ignored. This is unrealistic given that turbulent runup flows easily entrain available fine sediment. Proper consideration of SSC can be encouraged by including a mixed-fluid density coefficient (Cρ) as a multiplier for clear-seawater density, where elevated sediment content can be assumed and estimated. Minimum flow velocities required for boulder transport are shown to reduce as sediment concentrations increase.

Document Type

Article

First Page

363

Last Page

370

Publication Date

7-2-2020

DOI

10.1080/00288306.2020.1716815

Author First name, Last name, Institution

James P. Terry, Zayed University
Shoaib A. Malik, Zayed University

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