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原文传递 Overtide Generation in Small Inlet-Bay Systems

题名：	Overtide Generation in Small Inlet-Bay Systems
正文语种：	英文
作者：	Joseph L. DiLorenzo, Ph.D.1; Poshu Huang, P.E.2; Tavit O. Najarian, Sc.D., M.ASCE3
作者单位：	1Senior Scientist, Najarian Associates, 1 Industrial Way West, Eatontown, NJ 07724 (corresponding author). 2Mathematical Modeler, Najarian Associates, 1 Industrial Way West,Eatontown, NJ 07724. 3President, Najarian Associates, 1 Industrial Way West, Eatontown, NJ 07724.
关键词：	Inlets; Overtides; Shallow water tides; Tidal asymmetry; Flood dominance; Ebb dominance; Helmholtz pumping mode; Flood shoals; Tidal flats weakly nonlinear; Bay setup
摘要：	The generation of shallow water tides (overtides) may influence shoaling processes in shallow embayments and harbors. A simplified, conceptual model is developed to simulate the generation of overtides and tidal asymmetries in small inlet/bay systems. The model’s formulation assumes a weakly nonlinear, pumping-mode response and includes effects of four generating mechanisms: quadratic bottom friction (QB), elevation-effect of friction (EEF), nonlinear continuity (NC), and advective acceleration (AA). QB generates primarily odd harmonics, including a second overtide component (M6) that reduces/distorts peak flood/ebb currents symmetrically. The first overtide component (M4) is generated primarily by NC, EEF, and AA. NC, AA, and QB mechanisms are associated with flood-dominant distortion patterns, whereas the EEF mechanism is associated with a shift toward ebb dominance in the special case in which NC contributions are reduced (e.g., large basin tidal flats) and AA is small. Solutions for the M4 tide indicate phase-locking, and distortion patterns consistent with previous studies. A maximum flood-dominant response can occur when the ocean forcing frequency is half the Helmholtz frequency, which is a condition that may cause flood shoals to develop.
出版年：	2019
期刊名称：	Journal of Waterway, Port, Coastal, and Ocean Engineering
卷：	145
期：	5
页码：	1-19