Title of article :
Tidal truncation and barotropic convergence in a channel network tidally driven from opposing entrances
Author/Authors :
J.C. Warner، نويسنده , , D. Schoellhamer، نويسنده , , G. Schladow، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2003
Abstract :
Residual circulation patterns in a channel network that is tidally driven from entrances on opposite sides are controlled by the
temporal phasing and spatial asymmetry of the two forcing tides. The Napa/Sonoma Marsh Complex in San Francisco Bay, CA, is
such a system. A sill on the west entrance to the system prevents a complete tidal range at spring tides that results in tidal truncation
of water levels. Tidal truncation does not occur on the east side but asymmetries develop due to friction and off-channel wetland
storage. The east and west asymmetric tides meet in the middle to produce a barotropic convergence zone that controls the transport
of water and sediment. During spring tides, tidally averaged water-surface elevations are higher on the truncated west side. This
creates tidally averaged fluxes of water and sediment to the east. During neap tides, the water levels are not truncated and the propagation
speed of the tides controls residual circulation, creating a tidally averaged flux in the opposite direction.
Keywords :
channel network , tidal truncation , barotropic convergence , San Francisco Bay , Residual circulation
Journal title :
Estuarine, Coastal and Shelf Science
Journal title :
Estuarine, Coastal and Shelf Science