Tidal truncation and barotropic convergence in a channel network tidally driven from opposing entrances |
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| Affiliation: | 1. U.S. Geological Survey, Sacramento, CA, USA;2. University of California, Davis, CA, USA;1. III. Physikalisches Institut A, RWTH Aachen, Physikzentrum, 52056 Aachen, Germany;2. Institut für Theoretische Physik, Universität Heidelberg, Philosophenweg 16, 69120 Heidelberg, Germany;3. H. H. Wills Physics Laboratory, University of Bristol, Bristol, BS8 1TL, UK;4. High Energy Physics Group, Blackett Laboratory, Imperial College, Prince Consort Road, London, SW7 2AZ, UK;5. Institute of Particle Physics Phenomenology, Durham University, UK;6. Physik-Institut, Universität Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland;7. Experimental Physics Department, CERN, CH 1211 Geneva 23, Switzerland;8. Antwerp University, B2610 Wilrijk, Belgium;9. SISSA and INFN Sezione di Trieste, via Bonomea 265, I-34136 Trieste, Italy;10. Theoretical Particle Physics and Cosmology Group, Department of Physics, King’s College London, London WC2R 2LS, UK;11. Theoretical Physics Department, CERN, CH-1211 Geneva 23, Switzerland;12. Deutsches Elektronen-Synchrotron, Notkestr. 85, 22607 Hamburg, Germany;13. Department of Physics and Astronomy, Northwestern University, Evanston, IL 60208, USA;14. Rudolf Peierls Centre for Theoretical Physics, University of Oxford, Oxford, OX1 3PN, UK;15. Physics Department, Brown University, Providence, RI 02912, USA;p. GRAPPA Centre of Excellence, University of Amsterdam, Amsterdam, The Netherlands;q. Department of Physics and Astronomy, University of Sussex, Brighton BN1 9QH, UK;r. Astrophysics Group, Imperial College, Blackett Laboratory, Prince Consort Road, London, SW7 2AZ, UK;1. Faculty of Geomatics, East China University of Technology, Nanchang 330013, China;2. Key Laboratory of Watershed Ecology and Geographical Environment Monitoring, NASG, Nanchang 330013, China;3. Key Laboratory for Digital Land and Resources of Jiangxi Province, East China University of Technology, Nanchang 30013, China;4. Yangtze Estuary Hydrology and Water Resources Survey Bureau, Shanghai 200136, China;5. General Technical Engineering Schools of Jiangxi Province, Yongxiu 330306, China;6. Bureau of Housing and Urban-Rural Development of Shaoshan, Shaoshan 411300, China;1. Environmental Fluid Mechanics Group, Queensland University of Technology (QUT), QLD, 4000, Australia;2. School of Civil Engineering, The University of Queensland, QLD, 4072, Australia;1. Tropical Marine Science Institute, National University of Singapore, Singapore 119227, Singapore;2. Department of Biological Sciences, National University of Singapore, Singapore 117543, Singapore;1. Department of Mechanical Engineering, University of Hyogo, Himeji 671-2280, Japan;2. Department of Mechanical Engineering, Faculty of Science and Engineering, Kindai University, Osaka 577-8502, Japan;3. Research Center for Highly-Functional Nanoparticles, Doshisha University, Kyotanabe 610-0394, Japan;4. Center for Earth Information Science and Technology (CEIST), Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokohama, 236-0001, Japan |
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| 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. |
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