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You are here : eLibrary : IAHR World Congress Proceedings : 32nd Congress - Venice (2007) : THEME D: Maritime and Coastal Research and Engineering : Understanding the water surface elevation forcing mechanisms for the st. johns river
Understanding the water surface elevation forcing mechanisms for the st. johns river
Author : Hagen, Scott C., Yuji Funakoshi
This paper presents the application of a finite element, two-dimensional, hydrodynamic St. Johns River model for the simulation of water surface elevations for the 122-day period spanning June 1 September 30, 2005. The hydrodynamic model employed for calculating tides and surges is ADCIRC-2DDI. Three domain variations are included: 1) A model domain that incorporates the entire East Coast of the United States out to the 60W meridian, Gulf of Mexico and Caribbean Sea, while honing in on the St. Johns River area; 2) A sub-mesh that is shelf-based; and 3) A sub-mesh that is inlet-based. Numerous hydrodynamic simulations are conducted by altering the following forcings in order to determine their relative importance: 1) Astronomical tides; 2) Inflows from tributaries; and 3) Winds and pressures. The following two main conclusions are reported. First, wind forcing for the St. Johns River is equal to or greater than that of astronomic tides and generally supersedes the impact of inflows, while pressure variations have a minimal impact. Second, water levels inside the St. Johns River depend on the wind forcings in the deep ocean; however, if one applies an elevation hydrograph boundary condition from a large-scale domain model to a local-scale domain model the results are highly accurate.
File Size : 1,332,851 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 32nd Congress - Venice (2007)
Article : THEME D: Maritime and Coastal Research and Engineering
Date Published : 01/07/2007
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