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J. Mar. Sci. Eng. 2017, 5(3), 35; doi:10.3390/jmse5030035

CaMEL and ADCIRC Storm Surge Models—A Comparative Study

1
Department of Civil and Environmental Engineering, Tennessee State University, Nashville, TN 37209, USA
2
Institute of Marine Sciences, University of North Carolina at Chapel Hill, Morehead City, NC 28557, USA
3
Seahorse Coastal Consulting, Morehead City, NC 28557, USA
4
Northrop Grumman Center for High Performance Computing, Jackson State University, Jackson, MS 39204, USA
*
Author to whom correspondence should be addressed.
Received: 5 June 2017 / Revised: 28 July 2017 / Accepted: 28 July 2017 / Published: 9 August 2017

Abstract

The Computation and Modeling Engineering Laboratory (CaMEL), an implicit solver-based storm surge model, has been extended for use on high performance computing platforms. An MPI (Message Passing Interface) based parallel version of CaMEL has been developed from the previously existing serial version. CaMEL uses hybrid finite element and finite volume techniques to solve shallow water conservation equations in either a Cartesian or a spherical coordinate system and includes hurricane-induced wind stress and pressure, bottom friction, the Coriolis effect, and tidal forcing. Both semi-implicit and fully-implicit time stepping formulations are available. Once the parallel implementation is properly validated, CaMEL is evaluated against ADCIRC, an established storm surge model, using a hindcast of storm surge due to Hurricane Katrina. Observed high water marks are used to verify that both models have comparable accuracy. The effects of time step on the stability and accuracy of the models are investigated and indicate that the semi- and fully-implicit solvers in CaMEL allow the use of larger timesteps than ADCIRC’s explicit and semi-implicit solvers. However, ADCIRC outperforms CaMEL in parallel scalability and execution wall clock times. Wall times of CaMEL improve significantly when the largest stable time step sizes are used in respective models, although ADCIRC still is faster. View Full-Text
Keywords: shallow water equation; storm surge; parallel model; hybrid finite volume and finite element method; implicit matrix-free solver; spherical coordinate system shallow water equation; storm surge; parallel model; hybrid finite volume and finite element method; implicit matrix-free solver; spherical coordinate system
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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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MDPI and ACS Style

Akbar, M.K.; Luettich, R.A.; Fleming, J.G.; Aliabadi, S.K. CaMEL and ADCIRC Storm Surge Models—A Comparative Study. J. Mar. Sci. Eng. 2017, 5, 35.

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