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Full-Text Articles in Physical Sciences and Mathematics
On The Occurrence And Origins Of Hopanoids In The Chesapeake Bay (Maryland, Virginia), Gullaya Wattayakorn
On The Occurrence And Origins Of Hopanoids In The Chesapeake Bay (Maryland, Virginia), Gullaya Wattayakorn
Dissertations, Theses, and Masters Projects
Analyses of surface sediment samples from the Chesapeake Bay and sediment cores from the James and the Potomac River showed that pentacyclic triterpenoids of the hopanoid skeleton were ubiquitously present in all samples. The hopanoids have been identified and quantified by gas chromatographic retention data obtained on SE-52 stationary phase, and mass spectral comparisons with the branched/cyclic fraction of a Lorraine coal extract as well as published data from authentic standards. Hopanoid acids are of extended 17(beta)(H), 21(beta)(H)-structure, ranging from C(,31) to C(,33). The 17(beta)(H), 21(beta)(H)-bishomohopanoic acid (C(,32)) is always the major acid found in the samples. All acids were …
Evaluation Of Sediment Sources And Sinks: A Sediment Budget For The Rappahannock River Estuary, Craig G. Lukin
Evaluation Of Sediment Sources And Sinks: A Sediment Budget For The Rappahannock River Estuary, Craig G. Lukin
Dissertations, Theses, and Masters Projects
No abstract provided.
An Investigation Of Sand Transport Phenomena In The Rappahannock River Estuary, Virginia, Charles Joseph Natale
An Investigation Of Sand Transport Phenomena In The Rappahannock River Estuary, Virginia, Charles Joseph Natale
Dissertations, Theses, and Masters Projects
Quantitative evidence supplied by bottom sediment textural analysis, Fourier grain-shape analysis and Q-mode factor analysis indicate that river-borne sand-sized sediment originating in the upper reaches of the Rappahannock is actively transported downstream and ultimately delivered to the estuarine sediment regime. Current velocity observations in the upper estuary as well as suspended sediment concentrations measured at stream gaging stations, indicate that short-term extreme hydrological events such as periodic river flooding provide a plausible transport mechanism to move river-borne sands into the estuarine sediment regime.Events of this nature can disrupt average partly-mixed estuarine circulation patterns by displacing the salt-wedge to a more …
Organic Compound Levels In A Sediment Core From The Elizabeth River Of Virginia, Muzhen Lu
Organic Compound Levels In A Sediment Core From The Elizabeth River Of Virginia, Muzhen Lu
Dissertations, Theses, and Masters Projects
No abstract provided.
The Kara Sea: Geologic Structure And Water Characteristics, Donald B. Milligan
The Kara Sea: Geologic Structure And Water Characteristics, Donald B. Milligan
Dissertations, Theses, and Masters Projects
Movement of Atlantic Water into the Kara Sea is controlled by the bathymetry which funnels the inflow up three canyons along the eastern margin of the Svyataya Anna Trough. Mixing of the warm, saline Atlantic Water in these canyons with the considerable summer outflow of the Ob-Yenisey rivers results in the formation of Arctic Bottom Water and due to the presence and cooling by ice, in the formation of Arctic Surface Water. Both of these water masses then exit the Kara Sea as deep and shallow countercurrents to the incoming Atlantic Water. The northernmost canyon allows some Atlantic Water to …
Late Pleistocene Stratigraphy And Morphology Of The Lower Northern Neck, Virginia, Kathleen M. Farrell
Late Pleistocene Stratigraphy And Morphology Of The Lower Northern Neck, Virginia, Kathleen M. Farrell
Dissertations, Theses, and Masters Projects
No abstract provided.
On The Water Masses Of Norfolk Canyon, Evon Paul Ruzecki
On The Water Masses Of Norfolk Canyon, Evon Paul Ruzecki
Dissertations, Theses, and Masters Projects
Results from four cruises in the outer continental shelf/slope region of the Middle Atlantic Bight demonstrate the effect of Norfolk Canyon, an east coast submarine canyon, on the exchange of local water masses. Seasonal distributions of water masses and water types around the canyon were determined from closely spaced (2-5 km) hydrographic and XBT stations. Five component water types representing shelf, winter (or cold pool), slope, warm Western North Atlantic and cool Western North Atlantic waters are defined by specific T/S signatures. The percent of each water type necessary to achieve measured T/S values along sections to the north and …
Historical Evolution Of Coastal Sand Dunes On Currituck Spit, Virginia/North Carolina, Harold F. Hennigar
Historical Evolution Of Coastal Sand Dunes On Currituck Spit, Virginia/North Carolina, Harold F. Hennigar
Dissertations, Theses, and Masters Projects
No abstract provided.
The Virginia Chesapeake Bay: Recent Sedimentation And Paleodrainage, Michael J. Carron
The Virginia Chesapeake Bay: Recent Sedimentation And Paleodrainage, Michael J. Carron
Dissertations, Theses, and Masters Projects
A comparison of the bathymetric surveys of the 1850-series and 1950-series indicated an average sedimentation rate for the Virginia Chesapeake Bay of 0.55 m (1.81 ft) for the last century. A statistically significant relationship between the depth of water and the rate of sedimentation was found where high rates of sedimentation exist in extremely shallow water (0 to 2 m) and in intermediate depths (6 to 13 m), while low rates exist between 2 m and 6 m, and in some cases in water deeper than 13 m. The results of 900 km of continuous seismic reflection profiles taken in …
The Interaction Of Eolian Sand Transport, Vegetation, And Dune Geomorphology: Currituck Spit, Virginia-North Carolina, Andrew L. Gutman
The Interaction Of Eolian Sand Transport, Vegetation, And Dune Geomorphology: Currituck Spit, Virginia-North Carolina, Andrew L. Gutman
Dissertations, Theses, and Masters Projects
No abstract provided.
Forecasting Beach Erosion Along The Oceanic Coastlines Of The Northeast And Mid-Atlantic States, William S. Richardson
Forecasting Beach Erosion Along The Oceanic Coastlines Of The Northeast And Mid-Atlantic States, William S. Richardson
Dissertations, Theses, and Masters Projects
No abstract provided.
Geomorphic Interpretation Of Vegetation On Fisherman Island, Virginia, Mark Eliot Boule
Geomorphic Interpretation Of Vegetation On Fisherman Island, Virginia, Mark Eliot Boule
Dissertations, Theses, and Masters Projects
No abstract provided.
The Morphology And Processes Of The Virginia Chesapeake Bay Shoreline, Peter Stuart Rosen
The Morphology And Processes Of The Virginia Chesapeake Bay Shoreline, Peter Stuart Rosen
Dissertations, Theses, and Masters Projects
No abstract provided.
Development Of A Tidal Prism Model And Its Application To The Pagan River, Virginia, Angela D'Amico
Development Of A Tidal Prism Model And Its Application To The Pagan River, Virginia, Angela D'Amico
Dissertations, Theses, and Masters Projects
No abstract provided.
Geomorphic Processes Of A Drowned River Valley, Lower York River Estuary, Virginia, Michael Joseph Carron
Geomorphic Processes Of A Drowned River Valley, Lower York River Estuary, Virginia, Michael Joseph Carron
Dissertations, Theses, and Masters Projects
No abstract provided.
A One-Dimensional Mathematical Model Of Tidal Hydraulics And Salt Intrusion In Estuarine Rivers, Fwu-Ding Lin
A One-Dimensional Mathematical Model Of Tidal Hydraulics And Salt Intrusion In Estuarine Rivers, Fwu-Ding Lin
Dissertations, Theses, and Masters Projects
A one-dimensional mathematical model has been developed as a practical way to analyze the tidal wave propagation and its interaction with freshwater runoff. The model approaches the problem both theoretically and numerically. To develop this model, the one-dimensional hydrodynamic and salt-balance equations are derived by integrating the three-dimensional equations over the cross section. These differential equations are approximated with implicit finite difference forms and the tidal heights, currents and salinity distributions are solved by using digital computer CDC 6400. The model has been applied to the James River in two different cases: the normal case and hurricane case. Because of …
Beach Sands Of The Southern Delmarva Peninsula, Patterns And Causes, Carey Ingram
Beach Sands Of The Southern Delmarva Peninsula, Patterns And Causes, Carey Ingram
Dissertations, Theses, and Masters Projects
No abstract provided.
Sediment Transport Processes In A Salt Marsh Drainage System, John Daniel Boon Iii
Sediment Transport Processes In A Salt Marsh Drainage System, John Daniel Boon Iii
Dissertations, Theses, and Masters Projects
No abstract provided.
Mechanics Of Beach Cusp Formation, Asbury H. Sallenger
Mechanics Of Beach Cusp Formation, Asbury H. Sallenger
Dissertations, Theses, and Masters Projects
Beach cusps are crescentic shoreline accumulations of unconsolidated sediment that are characterized by a quasi-equal longshore spacing. The processes controlling the development of the cuspate form and the spacing of cusps were investigated. Field measurements showed that the cuspate form was derived through erosion of beach ridges, The ridges oriented alongshore in the swash zone are characterized by quasi-equally spaced channels cut normal to the shoreline whose widths are much less than the channel spacing. The upwash flows up the front face of the ridge and ponds shoreward of the ridge crest. The ponded fluid returns seaward through the channels. …
Carbon Transport In Two York River, Virginia Tidal Marshes, Kenneth Alan Moore
Carbon Transport In Two York River, Virginia Tidal Marshes, Kenneth Alan Moore
Dissertations, Theses, and Masters Projects
Annual net transports of particulate organic carbon (POC), dissolved organic carbon (DOC), and ATP-carbon were determined for two York River, Virginia, tidal marshes by monthly sampling for one year. Annual net losses of POC, DOC, and ATP-carbon from the marsh to the York River were observed for both areas, indicating that the long-term effect of these marshlands is to contribute both living and detrital organic material to the estuary. The mesohaline marsh area, Carter Creek, was observed to have the greater amount of organic carbon loss in the particulate fraction, while the oligohaline marsh area, Ware Creek, was observed to …
The Long-Term Model Of Salinity Intrusion Into The Estuarine Rivers, Mary Ann Terese Orzech
The Long-Term Model Of Salinity Intrusion Into The Estuarine Rivers, Mary Ann Terese Orzech
Dissertations, Theses, and Masters Projects
No abstract provided.
Fatty Acids And Hydrocarbons In The Surface Waters Of The York River, John G. Windsor
Fatty Acids And Hydrocarbons In The Surface Waters Of The York River, John G. Windsor
Dissertations, Theses, and Masters Projects
No abstract provided.
The Beach Water Table As A Response Variable Of The Beach-Ocean-Atmosphere System, Leland Edward Fausak
The Beach Water Table As A Response Variable Of The Beach-Ocean-Atmosphere System, Leland Edward Fausak
Dissertations, Theses, and Masters Projects
Fluctuations of the water table in a marine beach over a rising half-tide cycle were investigated as a function of variations in local still water level, swash runup distance, distance of a sampling station from the shoreline, and atmospheric pressure. The data were taken from a 30-day time series of observations of environmental variables taken at Virginia Beach, Virginia, during August and September, 1969. Sequential linear multiple regression analyses were used to rank the process variables in order of importance in each of 13 water-table monitoring wells spaced along a transect transverse to the shoreline . Results showed that tidal …
Quantitative Analysis Of Beach Sand Movement, Virginia Beach, Virginia, John D. Boon
Quantitative Analysis Of Beach Sand Movement, Virginia Beach, Virginia, John D. Boon
Dissertations, Theses, and Masters Projects
The present study describes a new approach to quantitative sediment tracing with dyed (fluorescent) particles, which can be used to obtain estimates of grain velocity, estimates of mobile layer thickness, and estimates of the rate of longshore sand transport.A simplified stochastic-process model was employed Involving the use of statistical procedures to analyze tracer displacement data on a time-stratified basis. The procedures provide meaningful estimates of the direction and magnitude of the movement of beach sand through set Intervals of time.
Results of a single tracer experiment are reported from a beach located near Virginia Beach, Virginia. The tracer particle-displacement data …
Chemistry Of Chesapeake Bay Sediments, David Kenneth Young
Chemistry Of Chesapeake Bay Sediments, David Kenneth Young
Dissertations, Theses, and Masters Projects
No abstract provided.
Adsorption Of Radionuclides On Clay Minerals, J. Ernest Warinner
Adsorption Of Radionuclides On Clay Minerals, J. Ernest Warinner
Dissertations, Theses, and Masters Projects
No abstract provided.