Please use this identifier to cite or link to this item: https://hdl.handle.net/11681/13375
Title: A three-dimensional numerical model study for the Chesapeake and Delaware Canal and adjacent bays
Authors: United States. Army. Corps of Engineers. Philadelphia District
Hsieh, Bernard B. (Bernard Bor-Nian), 1949-
Johnson, Billy H.
Richards, David R.
Keywords: Chesapeake Bay (Md. and Va.)
Delaware Bay
Estuary
Estuaries
Chesapeake and Delaware Canal
Canals
Waterways
Hydrodynamics
Salinity
Mathematical models
Numerical models
Publisher: Hydraulics Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: Technical report (U.S. Army Engineer Waterways Experiment Station) ; HL-93-4.
Description: Technical Report
Abstract: Flow problems in the Chesapeake and Delaware (C&D) Canal, Maryland and Delaware, have received much attention over the years. However, due to the complex interactions of forcing functions and the sensitivity of flow conditions in the canal to hydraulic head differences, previous investigators have been unable to completely resolve many questions. To better understand the effect of one estuarine system on the other and to accurately compute flow and mass fluxes through the canal, a three-dimensional numerical hydrodynamic model extending from the Chesapeake Bay Bridge at Annapolis, MD, through the C&D Canal and connecting with a grid extending from Trenton, NJ, to the month of Delaware Bay was developed. The model was initially tested by analyzing the propagation of tidal waves without considering salinity. An inset model that consisted of only the C&D canal was used to examine the sensitivity of results to wind stress, nonlinear terms in the equations of motion, an entrance loss term at both ends of the canal, bottom drag coefficients, and the effect of tidal datums. The information gained from the inset grid tests was then extended to he full hydrodynamic-salinity model. The tidal elevations, tidal currents, and salinity were well-verified during a month-long simulation using September, 1984 data. Verification accuracy depended primarily on providing correct tidal and salinity values at open boundaries. The verified model was then used to compute net transport through the C&D Canal for a range of channel depths. Computed results showed a westerly net transport of 61.53 m³/sec and a net salt transport of 0.58 g/sec through the canal for a 40-ft depth over the one month-long simulation. The model has other potential uses, e.g., to address larvae transport in the Upper Chesapeake Bay, to evaluate river regulation, to investigate water supply and saltwater intrusion, and to compute long-term simulations with hypothetical boundary variations representing possible regional management altematives.
Rights: Approved for public release; distribution is unlimited.
URI: http://hdl.handle.net/11681/13375
Appears in Collections:Technical Report

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