State estimation of tidal hydrodynamics using ensemble Kalman filter

    Authors

    H. Tamura; P. Bacopoulos; D. B. Wang; S. C. Hagen;E. J. Kubatko

    Comments

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    Abbreviated Journal Title

    Adv. Water Resour.

    Keywords

    DG ADCIRC-2DDI; Ensemble Kalman filter; State estimation; Parallelized; simulation; Tides; Hydrodynamics; DISCONTINUOUS GALERKIN METHODS; COMPUTATIONAL FLUID-DYNAMICS; SHALLOW-WATER EQUATIONS; OCEAN MODELING SYSTEM; DATA ASSIMILATION; ATLANTIC BIGHT; IMPLEMENTATION; LOCALIZATION; VALIDATION; FORECAST; Water Resources

    Abstract

    This paper presents a coupling of an ensemble Kalman filter (EnKF) with a discontinuous Galerkin-based, two-dimensional circulation model (DG ADCIRC-2DDI) to improve the state estimation of tidal hydrodynamics including water surface elevations and depth-integrated velocities. The methodology in this paper using EnKF perturbs the modeled hydrodynamics and bottom friction parameterization in the model while assimilating data with inherent error, and demonstrates a capability to apply EnKF within DG ADCIRC-2DDI for data assimilation. Parallel code development presents a unique aspect of the approach taken and is briefly described in the paper, followed by an application to a real estuarine system, the lower St. Johns River in north Florida, for the state estimation of tidal hydrodynamics. To test the value of gauge observations for improving state estimation, a tide modeling case study is performed for the lower St. Johns River successively using one of the four available tide gauging stations in model-data comparison. The results are improved simulations of water surface elevations and depth-integrated velocities using DG ADCIRC-2DDI with EnKF, both locally where data are available and non-locally where data are not available. The methodology, in general, is extensible to other modeling and data applications, for example, the use of remote sensing data, and specifically, can be readily applied as is to study other tidal systems. (C) 2013 Elsevier Ltd. All rights reserved.

    Journal Title

    Advances in Water Resources

    Volume

    63

    Publication Date

    1-1-2014

    Document Type

    Article

    Language

    English

    First Page

    45

    Last Page

    56

    WOS Identifier

    WOS:000329441000005

    ISSN

    0309-1708

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