Physical Sciences and Mathematics Commons^™

Sediment Transport Processes In A Salt Marsh Drainage System, John Daniel Boon Iii

Dissertations, Theses, and Masters Projects

No abstract provided.

An Experimental Study Of Habitat Selection By Juveniles Of Six Species Of Sciaenids Found In The Lower York River, Virginia, Arthur Carter Cooke

Dissertations, Theses, and Masters Projects

No abstract provided.

The Effects Of Salinity Shocks And Low Oxygen Levels On Atpase Activity In Two Estuarine Bivalves, Marvin Ervis Hedgepeth

Dissertations, Theses, and Masters Projects

No abstract provided.

Near Shore Influence Of A Natural Tidal Inlet, Jerome Peter Sovich

Dissertations, Theses, and Masters Projects

No abstract provided.

The Implementation Of A Special Language Interpreter For The Control Data 3100 Computer, James Thomas Lee

Dissertations, Theses, and Masters Projects

No abstract provided.

Nmr Detection Of Ionized Arsenic Vacancy Production In Gallium Arsenide, Richard K. Hester

Dissertations, Theses, and Masters Projects

No abstract provided.

Shoreline Situation Report Northampton County, Virginia, William D. Athearn, Gary L. Anderson, Robert J. Byrne, Carl H. Hobbs Iii, John M. Zeigler

Reports

No abstract provided.

Shoreline Situation Report Newport News, Virginia, Carl H. Hobbs Iii, Gary L. Anderson, William D. Athearn, Robert J. Byrne, John M. Zeigler

Reports

No abstract provided.

Ecological Survey, Upper James River, Surry Nuclear Power Station Site, August 1974, M. Bender, R. Jordan, M. Ho, M. Cavell

Reports

In May of 1969 field surveys to characterize selected biological communities in the Hog Island area of the James River were begun. The objective of these surveys has been to determine if significant changes occurred in the species composition or population levels of certain communities which could be related to the operation of the nuclear power generation station. Although during the period of study, methods and stations have been changed to adjust the study to changing regulations, its basic character has remained. Communities studied have included benthos, zoo- and phytoplankton and fouling organisms.

Final Report On Environmental Effects Of The Second Hampton Roads Bridge-Tunnel Construction To Virginia Department Of Highways : Effects On Benthic Communities, Donald F. Boesch, David H. Rackley

Reports

A sampling program was undertaken from July 1973 to June 1974, to assess the effects of construction of the second Hampton Roads Bridge-Tunnel on the benthic communities in the vicinity. Macrobenthic animals (defined as those retained by a 1.0 mm mesh sieve) were quantitatively sampled along three transects perpendicular to the new tunnel and in and around the fill "borrow areas" nearby on Willoughby Bank and Sewell's Point Spit. The effects of construction practices on the benthic communities·was assessed through interpretation of faunal composition, sediment characteristics, and bottom profiles.

Coastal Data Acquisition, Compilation And Analysis, Virginia Beach Coastal Compartment, Southeastern Virginia : Quarterly Technical Status Report June 10, 1974 - Sept. 10, 1974, Victor Goldsmith

Reports

No abstract provided.

James River Sediment Study: Operation Agnes Final Report, John Lunz, Robert J. Huggett

Reports

Bottom sediment samples were collected from the James River in Virginia and analyzed to evaluate the effects of tropical storm Agnes (summer, 1972) upon the sediment chemistry . The results of these analyses, frcm hereon called "post Agnes data," were compared with data from a similar study carried out during the summer of 1971 ( "pre-Agnes data"), reported under contract no. DACW-65-71-C-00~7 .

The post Agnes samples encompass three distinct shoaling areas involving a total of 34. 75 nautical miles of the James River . The first area extending from mile 24. 75 to 33. 50 can be considered os …

A Report On The Concentration, Distribution And Impact Of Certain Trace Metals From Sewage Treatment Plants On The Chesapeake Bay, Robert J. Huggett, O. P. Brickner, G. R. Helz, S. E. Sommmer

Reports

Population densities are ever increasing on the shores of the Chesapeake Bay and hence the flow of goods and services is being shifted to supply these people. This self perpetuating system demanismore and more of the surrounding envirorunent f or recreation, work and waste disposal. This is the case f or the Chesapeake and its sub- estuaries.

According to Brush (1974), of the total fresh water input into the Chesapeake Bay, between 1 and 2 percent is treated sewage. Toxic components on these waters may be of paramount importance in the Bay ecosystem and ma;y have disastrous effects on the …

Segmentation Of Chesapeake Bay: A Representative Exercise, Robert E. Ulanowicz, Bruce J. Neilson

Reports

The goal of the CRC/RANN Waste Water Program is to provide the tools to management agencies which will enable them to make sound quantitative decisions on the siting of future sewage outfalls and the upgrading or elimination of existing sewage treatment plants. Obviously, the available funds do not permit extensive field studies at every possible outfall site. Therefore, some system is needed which will allow data to be transferred from one area to other areas within the Bay which have similar characteristics. A system of "segmentation"., as suggested by Dr. D. W. Pritchard, was chosen by the Scientific Management Advisory …

A Program To Monitor The Environmental Effects Of Shipyard Expansion : A Final Report, Robert J. Diaz, M. E. Bender

Reports

Dredging and land reclamation are two of the potentially most damaging activities that man undertakes in estuarine areas. Hampton Roads, the world's largest natural harbor, is a multiple use port, being a major center for fishing and shellfishing, transportation, recreation and industrial sitings. Dredging which is a necessary perpetuation for some of these activities, could be directly or indirectly detrimental to others. It is in such a multiple use situation that environmental alterations, real or potential, must be carefully planned and closely monitored. Projects of the type underway can cause changes in circulation, water depth, turbidity, and patterns qf siltation, …

Function Of Marshes In Reducing Eutrophication Of Estuaries Of The Middle Atlantic Region, D. M. Axelrad, M. E. Bender, K. A. Moore

Reports

Annual nitrogen, phosphorus and carbon budgets for two Virginia salt marshes were determined by monthly measurements of water discharge and constituent concentrations over tidal cycles.

Considering all three forms of phosphorus measured (total, dissolved organic and orthophosphate) there was a net loss from the estuary to the marshes. The data reveal a loss of particulate μhosphorus of estuarine origin to marsh sediments and mineralization of this phosphorus in the marshes with subsequent export of dissolved inorganic and organic phosphorus back to the estuary.

Nitrogen flux data show a loss of nitrate and nitrite to the marshes. Particulate nitrogen is imported …

On The Reactions Of N2 With O, John B. Delos

Arts & Sciences Articles

Unimolecular decomposition of N2O, quenching of O(¹D) by N2, and vibrational relaxation of N2 in the presence of O(³P) are all believed to occur by the same curve crossing mechanism. This mechanism is examined making use of a complete theory of curve crossings that we have developed earlier. Good agreement with experiment is found for the unimolecular decomposition rate. The simple curve crossing mechanism does not explain the observed O(¹D) quenching rate; this rate must be due to complex formation and/or additional crossings. At high temperatures, the calculated vibrational relaxation time …

On The Use Of Drift Bottle And Seabed Drifter Data In Coastal Management, Christopher S. Welch, John J. Norcross

Reports

The use of drift bottle and seabed drifter information for use in coastal management is discussed. The drift bottle/seabed drifter portion of VIMS project MACONS (Mid Atlantic Continental Shelf) is described as an example of how a comprehensive survey using drift bottles and seabed drifters provides data useful for coastal management. The data from MACONS are analyzed to answer specific questions of interest to several different coastal managers: a manager siting a deep oil port, one siting a sewage outfall, a manager responsible for setting up emergency beach protection procedures before an accident occurs, and a manager responsible for the …

Development Of The Turbidity Maximum In A Coastal Plain Estuary : Final Report, Maynard M. Nichols, Galen Thompson

Reports

A study of the turbidity maximum in the Rappahannock Estuary; Virginia was conducted to determine how high concentrations of suspended sediment accumulate to form a maximum.

Time-series observations of current velocity, salinity and suspended sediment over 8 to 18 tidal cycles reveal that the maximum forms in a convergence of bottom residual currents near the transition between fresh and salty water. Sediment supplied mainly by the river is transported into the convergence by density currents and accumulates since velocity is nearly zero and settling exceeds upward mixing.

The maximum forms in the middle estuary after freshet or flooding and shifts …

Assessment Of The Potential Environmental Effects Of The Proposed Marina At York River State Park, Kenneth Marcellus, Gene M. Silberhorn, George M. Dawes

Reports

No abstract provided.

A Numerical And Spatial Study Of The Meadow Vole, Microtus Pennsylvanicus, Margaret Whitney Higgins Bowker

Dissertations, Theses, and Masters Projects

No abstract provided.

Variations In Major Cations And Certain Heavy Metals In The Serum Of The Blue Crab, Callinectes Sapidus, James Alden Colvocoresses

Dissertations, Theses, and Masters Projects

No abstract provided.

The Comparative Ecology Of Two Species Of Pipefish (Syngnathidae) In The York River, Virginia, Linda P. Mercer

Dissertations, Theses, and Masters Projects

No abstract provided.

A Two Dimensional Jet Flowing Into A Semi-Infinite Flow Field With An Ambient Velocity, Michael Leonard Crane

Dissertations, Theses, and Masters Projects

No abstract provided.

Distribution Of Foraminiferida In An Estuarine Marsh System, Charles Warren Norton

Dissertations, Theses, and Masters Projects

Foraminiferal faunas in marshes and distributary channels of the James River estuary, Virginia, disclose several facies. The channel facies, primarily Ammobaculites crassus, and A. sp. A, typical of estuaries in Chesapeake Bay and other brackish areas are readily distinguishable freom the march facies. Marshes are divisible laterally by changes in the relative proportions of marsh species such as Miliammina fusca, Ammoastuta salsa, and Haplophragmoides hancocki.Changes along the longitudinal estuarine salinity gradient are discernable in both tidal creeks and marsh. Channels exhibit a longitudinal gradient from a freshwater thecamoebinid facies through an upper and mid-estuarine Ammobaculites facies to a higher salinity …

Investigation Of Surface Films - Chesapeake Bay Entrance, William G. Macintyre, Craig C. Smith, Et Al

Reports

Experimental point source oil releases have been conducted in the Chesapeake Bay mouth area. Predictions of oil slick motion were tested, and slicks were sampled and analyzed to measure their aging rates over periods up to 32 hours. Remote sensing. techniques were used to detect and measure the spreading rate of oil. Some laboratory oil film aging experiments were done to further document and elucidate aging processes. Results indicate· a,reasonable motion prediction, an explanation of the non-biological initial aging of oil films, and a fair corroboration of a theoretical oil spreading model.

Optimum Age, Temperature, And Salinity For Estuarine Stocking Of Juvenile Striped Bass, Morone Saxatilis, Walter Steven Otwell

Dissertations, Theses, and Masters Projects

A 3n factorial design to evaluate the effects of an abrupt introduction of striped bass, Morone saxatilis from a closed-system rearing facility into a variety of experimental temperature and salinity combinations has demonstrated a considerable hardiness of juvenile fish. Striped bass less than two months old had over 80.0%, survival during seven days subsequent to acute introduction from an average ambient condition of 21.0 ± 3 C at 0.20 to 4.8% into temperatures of 18 C and 24 C and salinities of 4.0% and 12.0%. Relative growth in these treatments was significantly greater than in the 12 C treatment at …

Biology Of The Rock Crab, Cancer Irroratus Say, In Coastal Waters Of Virginia, Lewis Roller Shotton

Dissertations, Theses, and Masters Projects

The commercial seabass notting fishery and the trawl fishery in the Blackfish Bank area east of the entrance to Chincoteague Bay were used to study the biology of the rock crab, Cancer irroratus Say. Highest relative abundance of rock crabs occured in February, March, and April when coldest inshore (<30m) bottom water temperatures occurred. Relative abundance during all other months was extremely low. The apparent seasonal change in relative abundance may be due to an inshore-offshore seasonal migration of mature crabs following the seasonal inshore-offshore shift of colder bottom water. Male rock crabs grow to a significantly larger size than females. The carapace width range of males captured in the potting fishery was 66 to 141 mm; and 25 to 106 mm for females. In the trawl fishery the width range for males was 20 to 137 mm; and 22 to 102 mm for females. In both pot and trawl catches the male to female ratio was biased in favor of males. Males comprised 92% of the pot catch and 84% of all crabs captured by trawl. From August through December all crabs were in the hard shell intermolt stage. Small percentages of soft crabs occurred from January through June. Papershell crabs predominated in February, March and April. It is probable that most crabs molted in January and the process of exoskeleton hardening took several months. Ovigerous females were captured in seabass pots in April and June and in trawls from February through April. All ovigerous crabs were in hard shell condition. Gondal inspection of males and the presence of eggs on females indicated that rock crabs mature at a relatively small size (30 mm carapace width). Female rock crabs have a deeper body and wider abdomen than equivalent width males. Abdomen width grows more rapidly for females after the onset of sexual maturity than before. Mature females have a longer carapace than equivalent width males. Male and female regressions of chela length on carapace width could not be compared statistically but plots of the equations suggest no sexual difference. This dissertation is from the Joint Program Degree from the College of William & Mary and University of Virginia and awarded by the University of Virginia.

Growth Rate And Nesting Aspects For The Glossy Ibis In Virginia, 1972, John William Williams

Dissertations, Theses, and Masters Projects

No abstract provided.

A Kinetic Examination Of 1,3-Di-T-Butyl-3-Methylbromoallene Solvolysis, Dwight Ellen Foster Ellis

Dissertations, Theses, and Masters Projects

No abstract provided.