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Kazemi Z.,University of Technology Malaysia | Hashim N.B.,University of Technology Malaysia | Aslani H.,University of Technology Malaysia | Liu Z.,Environmental Scientist Dynamic Solutions LLC | And 3 more authors.
International Journal of Environmental Research | Year: 2014

The Johor Strait is an estuarine system located on the coast of the state of Johor in Malaysia. The Western Part of Johor Strait is a shallow estuarine located between Causeway and Pulai River. A hydrodynamic model was calibrated based on the Environmental Fluid Dynamic Code (EFDC) from 4th to 17th of October, 2009. In this calibration, the EFDC hydrodynamic model was configured to simulate time series surface water elevation, velocity, and salinity. The model grid consisted of 2310 grid cells in the horizontal direction and four vertical layers. The model reasonably simulated the tidal range. The simulated velocity showed good agreement with observations data. The predicted salinity model Salinity compared the surface layer with observed data. Results of model showed that changes of salinity from surface to depth were uniform and this condition implied rapid vertical mixing of the water in the system. The calibration model can be used for water quality and sediment modeling and for studying water age modeling.

Devkota J.,Dynamic Solutions International LLC | Fang X.,Dynamic Solutions International LLC | Fang X.,Auburn University
Water (Switzerland) | Year: 2015

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. © 2015 by the authors.

Dynamic Solutions International LLC | Date: 2016-02-17

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