Index Catalog // ScholarsArchive@OSU

Modeling the Lateral Circulation in Straight, Stratified Estuaries*

Creator:: Lerczak, James A. and Geyer, W. Rockwell
Abstract:: The dynamics of lateral circulation in an idealized, straight estuary under varying stratification conditions is investigated using a three-dimensional, hydrostatic, primitive equation model in order to determine the importance of lateral circulation to the momentum budget within the estuary. For all model runs, lateral circulation is about 4 times as...
Resource Type:: Article
Full Text:: in Straight, Stratified Estuaries* JAMES A. LERCZAK AND W. ROCKWELL GEYER Woods Hole Oceanographic

Mechanisms Driving the Time-Dependent Salt Flux in a Partially Stratified Estuary

Creator:: Lerczak, James A., Geyer, W. Rockwell, and Chant, Robert J.
Abstract:: The subtidal salt balance and the mechanisms driving the downgradient salt flux in the Hudson River estuary are investigated using measurements from a cross-channel mooring array of current meters, temperature and conductivity sensors, and cross-channel and along-estuary shipboard surveys obtained during the spring of 2002. Steady (subtidal) vertical shear dispersion,...
Resource Type:: Article
Full Text:: Stratified Estuary* JAMES A. LERCZAK AND W. ROCKWELL GEYER Woods Hole Oceanographic Institution, Woods Hole

Numerical modeling of an estuary: A comprehensive skill assessment

Creator:: Warner, John C., Geyer, W. Rockwell, and Lerczak, James A.
Abstract:: Numerical simulations of the Hudson River estuary using a terrain-following, three-dimensional model (Regional Ocean Modeling System (ROMS)) are compared with an extensive set of time series and spatially resolved measurements over a 43 day period with large variations in tidal forcing and river discharge. The model is particularly effective at...
Resource Type:: Article
Full Text:: skill assessment John C. Warner U.S. Geological Survey, Woods Hole, Massachusetts, USA W. Rockwell

The Influence of Lateral Advection on the Residual Estuarine Circulation: A Numerical Modeling Study of the Hudson River Estuary

Creator:: Scully, Malcolm E., Geyer, W. Rockwell, and Lerczak, James A.
Abstract:: In most estuarine systems it is assumed that the dominant along-channel momentum balance is between the integrated pressure gradient and bed stress. Scaling the amplitude of the estuarine circulation based on this balance has been shown to have predictive skill. However, a number of authors recently highlighted important nonlinear processes...
Resource Type:: Article
Full Text:: Center for Coastal Physical Oceanography, Old Dominion University, Norfolk, Virginia W. ROCKWELL GEYER

Turbulent mixing in a strongly forced salt wedge estuary

Creator:: Ralston, David K., Geyer, W. Rockwell, Lerczak, James A., and Scully, Malcolm
Abstract:: Turbulent mixing of salt is examined in a shallow salt wedge estuary with strong fluvial and tidal forcing. A numerical model of the Merrimack River estuary is used to quantify turbulent stress, shear production, and buoyancy flux. Little mixing occurs during flood tides despite strong velocities because bottom boundary layer...
Resource Type:: Article
Full Text:: estuary Turbulent mixing in a strongly forced salt wedge estuary David K. Ralston,1 W. Rockwell Geyer,1

The Temporal Response of the Length of a Partially Stratified Estuary to Changes in River Flow and Tidal Amplitude

Creator:: Lerczak, James A., Geyer, W. Rockwell, and Ralston, David K.
Abstract:: The temporal response of the length of a partially mixed estuary to changes in freshwater discharge Q𝒻 and tidal amplitude Uₜ is studied using a 108-day time series collected along the length of the Hudson River estuary in the spring and summer of 2004 and a long-term (13.4 yr) record...
Resource Type:: Article
Full Text:: Oceanic and Atmospheric Sciences, Oregon State University, Corvallis, Oregon W. ROCKWELL GEYER AND DAVID

Structure, variability, and salt flux in a strongly forced salt wedge estuary

Creator:: Ralston, David K., Geyer, W. Rockwell, and Lerczak, James A.
Abstract:: The tidally varying circulation, stratification, and salt flux mechanisms are investigated in a shallow salt wedge estuary where fluvial and tidal velocities are large and the steady baroclinic circulation is comparatively weak. The study integrates field observations and numerical simulations of the Merrimack River estuary. At moderate to high discharge...
Resource Type:: Article
Full Text:: , variability, and salt flux in a strongly forced salt wedge estuary David K. Ralston,1 W. Rockwell Geyer,1 and

Subtidal Salinity and Velocity in the Hudson River Estuary: Observations and Modeling

Creator:: Ralston, David K., Geyer, W. Rockwell, and Lerczak, James A.
Abstract:: A tidally and cross-sectionally averaged model based on the temporal evolution of the quasi-steady Hansen and Rattray equations is applied to simulate the salinity distribution and vertical exchange flow along the Hudson River estuary. The model achieves high skill at hindcasting salinity and residual velocity variation during a 110-day period...
Resource Type:: Article
Full Text:: : Observations and Modeling DAVID K. RALSTON, W. ROCKWELL GEYER, AND JAMES A. LERCZAK* Woods Hole Oceanographic

Estuarine Exchange Flow Quantified with Isohaline Coordinates: Contrasting Long and Short Estuaries

Creator:: Chen, Shih-Nan, Geyer, W. Rockwell, Ralston, David K., and Lerczak, James A.
Abstract:: Isohaline coordinate analysis is used to compare the exchange flow in two contrasting estuaries, the long (with respect to tidal excursion) Hudson River and the short Merrimack River, using validated numerical models. The isohaline analysis averages fluxes in salinity space rather than in physical space, yielding the isohaline exchange flow...
Resource Type:: Article
Full Text:: Oceanographic Institution, Woods Hole, Massachusetts W. ROCKWELL GEYER AND DAVID K. RALSTON Applied Ocean

South Umpqua River Watershed assessment and action plan

Creator:: Geyer, Nancy A.
Abstract:: The South Umpqua River Watershed assessment has two goals: 1) To describe the past, present, and potential future conditions that affect water quality and fish habitat within the South Umpqua River Watershed; and 2) To provide a research-based action plan that suggests voluntary activities to improve fish habitat and water...
Resource Type:: Technical Report
Full Text:: Basin N EW S South Umpqua River Watershed Prepared by Nancy A. Geyer for the Umpqua Basin

ScholarsArchive@OSU

Modeling the Lateral Circulation in Straight, Stratified Estuaries*

Mechanisms Driving the Time-Dependent Salt Flux in a Partially Stratified Estuary

Numerical modeling of an estuary: A comprehensive skill assessment

The Influence of Lateral Advection on the Residual Estuarine Circulation: A Numerical Modeling Study of the Hudson River Estuary

Turbulent mixing in a strongly forced salt wedge estuary

The Temporal Response of the Length of a Partially Stratified Estuary to Changes in River Flow and Tidal Amplitude

Structure, variability, and salt flux in a strongly forced salt wedge estuary

Subtidal Salinity and Velocity in the Hudson River Estuary: Observations and Modeling

Estuarine Exchange Flow Quantified with Isohaline Coordinates: Contrasting Long and Short Estuaries

South Umpqua River Watershed assessment and action plan

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