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Water 2015, 7(5), 1769-1791; doi:10.3390/w7051769

Quantification of Water and Salt Exchanges in a Tidal Estuary

1
Dynamic Solutions International LLC, Edmonds, WA 98020, USA
2
Department of Civil Engineering, Auburn University, Auburn, AL 36849-5337, USA
*
Author to whom correspondence should be addressed.
Academic Editor: Say-Leong Ong
Received: 28 January 2015 / Revised: 6 April 2015 / Accepted: 20 April 2015 / Published: 24 April 2015
(This article belongs to the Special Issue Water Quality Control and Management)
View Full-Text   |   Download PDF [2612 KB, uploaded 9 June 2015]   |  

Abstract

A calibrated three-dimensional hydrodynamic model was applied to study subtidal water and salt exchanges at various cross sections of the Perdido Bay and Wolf Bay system using the Eulerian decomposition method from 6 September 2008 to 13 July 2009. Salinity, velocity, and water levels at each cross section were extracted from the model output to compute flow rates and salt fluxes. Eulerian analysis concluded that salt fluxes (exchanges) at the Perdido Pass and Dolphin Pass cross sections were dominated by tidal oscillatory transport FT, whereas shear dispersive transport FE (shear dispersion due to vertical and lateral shear transport) was dominant at the Perdido Pass complex, the Wolf-Perdido canal, and the lower Perdido Bay cross sections. The flow rate QF and total salt transport rate FS showed distinct variation in response to complex interactions between discharges from upstream rivers and tidal boundaries. QF and FS ranged from −619 m3·s−1 (seaward) to 179 m3·s−1 (landward) and −13,480–6289 kg·s−1 at Perdido Pass when river discharges ranged 11.0–762.5 m3·s−1 in the 2008–2009 simulation period. View Full-Text
Keywords: Eulerian decomposition; salt exchange; numerical simulations; flow characteristics; estuary Eulerian decomposition; salt exchange; numerical simulations; flow characteristics; estuary
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Devkota, J.; Fang, X. Quantification of Water and Salt Exchanges in a Tidal Estuary. Water 2015, 7, 1769-1791.

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