000011758 001__ 11758
000011758 005__ 20141205155943.0
000011758 04107 $$aeng
000011758 046__ $$k2008-10-12
000011758 100__ $$aSun, J.S.
000011758 24500 $$aPrediction of Tsunami Propagation in the Pearl River Estuary

000011758 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000011758 260__ $$b
000011758 506__ $$arestricted
000011758 520__ $$2eng$$aTsunamis entering into shallow water regions may become highly nonlinear and this may be due to the irregularity of sea bottom roughness relative to the water depth and the complex coastline geometry. The elliptic mild-slope equation is commonly used to predict the nonlinear wave propagation in shallow water regions but it requires huge amount of computer resources which may not be practical for tsunami propagation predictions. An efficient finite element approach has been adopted in the present project to resolve the nonlinear problem of wave transformation in nearshore zones as well as to better conform the model grids to any complex coastline configurations. The efficient approach is based on the wave action conservation equation that takes into account of wave refraction-diffraction and energy dissipation due to bottom roughness. An operator splitting scheme is employed to solve the wave action conservation equation. Firstly, to increase numerical stability, the Eulerian-Lagrangian method is applied to solve the advection terms in the equation. The horizontal terms are then discretized by an implicit finite element method and, finally, the vertical terms are approximated by an implicit finite difference method. A nominal-time iteration method is used to efficiently solve the non-linear irrotational wave number equation for the wave direction. Over 6000 nine-node elements have been used to mesh the Pearl River estuary region. The boundary conditions are based on the results obtained from a simulation applied for a larger computation domain encompassing the entire South China Sea. The computed result provide a general picture of tsunami propagation in the desired region. Model validation and result verification, however, are necessary for any future prediction exercises.

000011758 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000011758 653__ $$aTsunamis, shallow water regions, finite element approach, operator splitting scheme, PRe

000011758 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000011758 720__ $$aSun, J.S.$$iWai, O.W.H.$$iChau, K.T.$$iWong, R.H.C.
000011758 8560_ $$ffischerc@itam.cas.cz
000011758 8564_ $$s476488$$uhttps://invenio.itam.cas.cz/record/11758/files/15-0040.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: 15-0040.
000011758 962__ $$r9324
000011758 980__ $$aPAPER