Premium
Double peak‐flood current asymmetry in a shallow‐water‐constituent dominated embayment with a macro‐tidal flat
Author(s) -
Byun DoSeong,
Cho YangKi
Publication year - 2006
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2006gl026967
Subject(s) - amplitude , waves and shallow water , bay , current (fluid) , geology , oceanography , flood myth , physics , geography , archaeology , quantum mechanics
Tide and tidal current distortions were examined in Hampyung Embayment, a shallow, semidiurnal tide‐dominated bay with large tidal flats, via in situ monitoring. Harmonic analyses reveal that the shallow‐water constituents of the tides and tidal currents are strong in this restricted setting relative to on the open coast. In particular, the amplitudes of the shallow‐water currents constituents (M 4 , MS 4 , M 6 , 2MS 6 ) are three times greater than those of the diurnal constituents (K 1 , O 1 ). The quarter‐diurnal (M 4 + MS 4 ) and sexta‐diurnal (M 6 + 2MS 6 ) current amplitudes account for >35% and >17% of the semi‐diurnal current (M 2 + S 2 ) amplitudes, which account for >42% of total amplitude. The MS 4 current amplitude is as important as that of the M 4 amplitude in the middle of the bay. Such strong generation of shallow‐water velocity constituents induced by non‐linear processes leads to an ebb‐dominated tidal regime with double‐flood current‐velocity peaks.