Physical Sciences and Mathematics Commons^™

Distribution Of Submerged Aquatic Vegetation In The Chesapeake Bay And Tributaries And Chincoteague Bay - 1989, R J. Orth, Judith F. Nowak

Reports

No abstract provided.

Animals Of Intertidal Sand And Mudflats, A Glance, Kirk J. Havens, Virginia Institute Of Marine Science, Wetlands Program

Reports

No abstract provided.

Chesapeake Bay Wave Climate : Thimble Shoals Wave Station, Report And Summary Of Wave Observations, September 27, 1988 Through October 17, 1989, John D. Boon, S. M. Kimball, K. D. Suh, D. A. Hepworth

Reports

The Virginia Institute of Marine Science, in cooperation with the Virginia Department of Conservation and Recreation, Division of Soil and Water Conservation, has identified as one of its major goals the systematic study of hydrodynamic processes that affect recreational, shoreline and benthic resources in the coastal zone of the Commonwealth. In pursuit of that goal, a long-term study of the wave climate in the Virginia portion of Chesapeake Bay was initiated in 1988 with support from the National Oceanographic and Atmospheric Administration through the Coastal Zone Management Program administered by the Virginia Council on the Environment (Grant Ho. HA88AA-D-CZ092). Past …

Geological And Benthic Evaluation Of Sand Resources In The Lower Chesapeake Bay, Report 2, Tail Of The Horseshoe : Appendix, Carl C. Hobbs Iii, Linda C. Schaffner

Reports

Appendices to the final report with data and core information:

• York Spit Channel
• Sand Inventory Data
• Thimble Shoals Channel
• Tail of the Horseshoe
• Cape Henry Channel
• data from benthic evaluation
• listing of species collected in quantitative box cores
• sediment profile imagery
• station locations

Geological And Benthic Evaluation Of Sand Resources In The Lower Chesapeake Bay, Report 2, Tail Of The Horseshoe : Final Report V.1, Carl C. Hobbs Iii, Linda C. Schaffner

Reports

This is the second of two reports concerning the resources of sand in the lower portions of Chesapeake Bay. The first, Geotechnical and Benthic Evaluation of Sand Resources in the Lower Chesapeake Bay (Kimball and others, 1989), presents a study of the resources in Thimble Shoal. The present work is a study of the area known as Tail of the Horseshoe which is just east of Thimble Shoal (Figure 1). The deposits of sand described in this report will be of most interest to the communities of Norfolk and Virginia Beach.

A Survey Of Compensatory Mitigation Within The Tidal Wetlands Of Virginia, Thomas A. Barnard, Pamela Mason

Reports

This study has as its primary purpose an examination of how compensatory mitigation has worked as a wetlands management tool to date in Virginia (i.e. how well theory has been put into practice). Our approach was to look at the overall use of compensation in coastal Virginia based on regulatory records and to examine as many existing created wetlands as possible within the tidal area of the state to determine how closely these projects have come, collectively, to fulfilling the compensatory goal of wetland replacement. Secondary objectives includes an examination of the literature regarding wetland compensation concept evaluation and to …

Status Of The Major Oyster Diseases In Virginia 1989 A Summary Of The Annual Monitoring Program, Eugene M. Burreson

Reports

No abstract provided.

Research, Education And "Proper Extension Work" : The First 50 Years Of The Virginia Institute Of Marine Science, William J. Hargis Jr.

Miscellaneous

No abstract provided.

Acoustic Geology Of A Portion Of Virginia's Innermost Continental Shelf, Carl H. Hobbs Iii

VIMS Books and Book Chapters

Side-scan sonography of the innermost continental shelf between Cape Henry and the Virginia-North Carolina border depicts a relatively typical inner shelf bottom generally characterized by medium density, meso-scale roughness. Subbottom acoustic protiles depict the stratigraphy as a Tertiary age basement separated from Quatenary-age deposits by a regional, angular(?) unconformity. Holocene-age sediments form a discontinuous layer above another unconformity. The area's topography appears to be a function of the presence of the modern sediments.

Heavy Mineral Concentrations In Sediments Of The Virginia Inner Continental Shelf, C. R. Berquist Jr., C. T. Fischler, L. J. Calliari, Et Al

VIMS Books and Book Chapters

The Virginia Division of Mineral Resources and the Virginia Institute of Marine Science investigated the occurrence of heavy minerals in the offshore sediments of Virginia. We began the project because earlier reconnaissance studies reported high heavy-mineral concentrations from several samples collected off the Eastern Shore of Virginia. Our work confirms the previously reported mineral values and locates additional high concentrations up to 20 nautical miles offshore. Furthermore, we show that potentially economic mineral values are not restricted no surficial sediments, but also are found in the upper 15 to 20 feet of inner continental shelf sediments. Several core samples indicate …

The Dynamics Of Long-Term Mass Transport In Estuaries, John M. Hamrick

VIMS Books and Book Chapters

The dynamics of long-term mass transport in estuaries having weakly nonlinear long wave dynamics are investigated. Low pass filtered long-term mass transport equations are derived for conditions of weak and strong vertical stratification. The dynamics of the residual mass transport velocity, or lowest order approximation to the Lagrangian residual velocity, are investigated by perturbation analyses of the hydrodynamics equations. For weak vertical stratification conditions, analytical results showing the influence of topography, the earth's rotation, and channel curvature on the distribution of the residual mass transport velocity field are presented. The calculation of the residual mass transport velocity field from field …

Wetlands Board Bulletin Vol. V, No. 1, Virginia Institute Of Marine Science

Virginia Wetlands Reports

• Raccoon, Golden Silk Spider. Virginia Rail American Shad. Reed Grass, Arrowhead
• Waste Assimilation by Wetlands. Kirk J. Havens
• Another Perspective on Wetlands Management. David G. Burke In the General Assembly. 1990.

Population Dynamics Of Young-Of-The-Year Striped Bass, Morone Saxatilis, Populations, Based On Daily Otolith Increments, Lisa L. Kline

Dissertations, Theses, and Masters Projects

Validation of daily increment deposition in otoliths of juvenile striped bass up to 80 days of age was provided through sequential sacrifice of known age hatchery-reared fish in 1987 and 1989, and through tetracycline marking of otoliths of cage-cultured striped bass in 1989. Ages of fish between 80-110 days old were consistently underestimated by 1-3 growth increments. Known age juvenile striped bass were raised in the laboratory in 1989 under controlled environmental conditions. These experiments provided evidence of an endogenous circadian rhythm controlling daily increment deposition in juvenile striped bass otoliths. Juvenile striped bass were collected in the 4 Virginia …

Heavy Mineral Variability And Provenance Of The Virginia Inner Shelf And Lower Chesapeake Bay, L. J. Calliari, C. T. Fischler, C. R. Berquist Jr.

VIMS Books and Book Chapters

The mineral composition of the 3- to 4-phi (0.125 to 0.063 mm) size fraction of 49 surficial grab samples,located north and south of the entrance to Chesapeake Bay and of 38 surficial samples, located in the bay mouth, was determined during this study. Although up to 17 minerals were identified, principal components analysis indicated that seven minerals accounted for 96 percent of the composition variance in the bay samples. By using Q-mode factor analysis, three mineral composition end-members (factors) were selected from the sample data and provided an adequate description of the spatial variation in heavy-mineral composition. The end members …

Cataract Occurrence In Micropogonia Furnieri (Desmarest, 1822) In The Area Between Capes Frio And Torres (23° S And 29° S), Brazil : Investigation Of Causes And Electrophoretic Studies Of Total Proteins Of The Eye Lenses, Anna Emila A. De M. Vazzoler, Van Ngan Phan

Reports

The frequency and distribution of these specimens were analysed and the electrophoretic patterns of soluble eye-lens proteins were determined. This cataract is not of parasitic origin and was rare in specimens from the coastal area. In the lagunar region it occurs mainly in specimens of the River Baguacu from April to November.

A Procedure For Assessing Heavy Mineral Resources Potential, Andrew E. Grosz, C. R. Berquist Jr., C. T. Fischler

VIMS Books and Book Chapters

Supplies of placer heavy minerals, such as ilmenite, rutile, zircon, and monazite, are anticipated to be in short supply by early in the next century. The depletion of conventional onshore deposits coupled with the declaration of the Exclusive Economic Zone in 1983 have provided the impetus to assess the resource potential of heavy-mineral concentrations in U.S. Continental Shelf sediments as future sources for these mineral commodities.

Mineralogically imprecise assessments of placer resources result from analyses of concentrates derived from small volume samples because of the particle-sparsity effect. The overall low grade of heavy minerals in Atlantic Continental Shelf sediments require …

Quaternary Geology Of The Chesapeake Bay, Jeffrey P. Halka, Steven M. Colman, Carl H. Hobbs Iii

VIMS Books and Book Chapters

The Chesapeake Bay, which is a classic coastal plain estuary, is located on a trailing edge continental margin. It has a surface area of nearly 6,000 km2 and ranges in width from 8 to 48 km. The morphology of the bay clearly reflects its formation as a response to fluctuating sea level during and following the last major continental glaciation. The shoreline is highly irregular, the tributaries form an intricate dendritic drainage pattern, and a deep axial channel occurs along much of its length (fig. 1). Water depths commonly exceed 30m in this deep channel, which is flanked by broad …

Monitoring Seagrass Distribution And Abundance Patterns: A Case Study From The Chesapeake Bay, Robert J. Orth, Kenneth A. Moore, Judith F. Nowak

VIMS Books and Book Chapters

Seagrasses, or submerged aquatic vegetation (SA V), have been mapped in the Chesapeake Bay five times between 1978 and 1987 with standard aerial photographic techniques, resulting in annual reports on SAV distribution. Acquisition of the vertical photography at a scale of 1:24,000, adhering to strict quality-assurance guidelines based on sun angle, tidal stage, cloud cover, wind speed, and season, has produced excellent, high-contrast imagery delineating beds of SAV from adjacent, unvegetated areas. Ground-truthing data from various State, Federal, and public organizations have corroborated the photographic data base. (more ...)

Persistence Of Residual Currents In The James River Estuary And Its Implication To Mass Transport, Albert Y. Kuo, John M. Hamrick, Gamble M. Sisson

VIMS Books and Book Chapters

The distribution and persistence of Eulerian and Lagrangian residual velocity in a cross sectional transect of the James River estuary, Virginia are analyzed. The Eulerian residual velocity has the characteristic two-layered estuarine circulation in the northern half of the transect, however, the net flow is directed downriver at all depths in the shallower southern half of the transect. In the deep channel, the two-layered Eulerian residual circulation is highly persistent over the six month study duration, with disruptions occurring less than 10% of the time when meteorological forcings are intense. No spring-neap tidal cycle variation is apparent. The magnitude of …

Single And Double Nucleophilic-Addition To Coordinated Pi-Hydrocarbons - Manganese-Mediated Functionalization Of Arenes, Robert D. Pike, D. A. Sweigart

Arts & Sciences Articles

A range of carbon-donor nucleophiles add to the arene ring in (arene)Mn(CO)2L+ cations to give neutral cyclohexadienyl complexes that liberate monofunctionalized arenes upon oxidative removal of the metal. Treatment of the cyclohexadienyl complexes with the nitrosonium salt NOPF6 affords cationic metal nitrosyl complexes that are attacked by a second nucleophile to give cis- and trans-difunctionalized 1,3-cyclohexadienes. When the metal center is chiral, this procedure provides a route to enantiomerically pure cyclohexadienes. 1. Introduction 2. Mechanism of Nucleophilic Addition 3. Single Nucleophilic Addition 4. Double Nucleophilic Addition 5. Conclusions

The Effects Of Shading By Open-Pile Structures On The Density Of Spartina Alterniflora, Heather L. Mcguire

Dissertations, Theses, and Masters Projects

No abstract provided.

Patterns Of Habitat Utilization In 0-Age Summer Flounder (Paralichthys Dentatus), David M. Wyanski

Dissertations, Theses, and Masters Projects

No abstract provided.

Data Constraints In Function-Oriented Languages, Earl Stavis Harris

Dissertations, Theses, and Masters Projects

No abstract provided.

An Investigation Of Impediments To Commercial Shellfish Mariculture In Virginia, Robert Charles Neikirk

Dissertations, Theses, and Masters Projects

A nationwide survey of shellfish mariculturists was used in conjunction with a literature review and review of state and federal laws and regulations, to identify impediments to commercial shellfish mariculture development. The results of the survey and reviews were utilized to identify likely impediments to commercial shellfish mariculture in Virginia and to develop recommendations to address the identified impediments, should Virginia wish to pursue efforts to enhance development of this industry. This study suggests there are state laws, regulations, and policies which act as impediments to commercial shellfish mariculture development in Virginia. Mar,y of the identified regulatory impediments result from …

Frna Coliphages As A Viral Indicator Of Sewage Pollution In An Estuary, David Miller Boyd

Dissertations, Theses, and Masters Projects

No abstract provided.

Origin Of A Solitary Sand Shoal Offshore Of Sandbridge Beach, Virginia, James Knox Dame

Dissertations, Theses, and Masters Projects

No abstract provided.

Characterization Of Minchinia Sp Spores (Ascetospora: Haplosporidiidae) Infecting Teredo Navalis L And Placopecten Magellanicus Von Martens (Mollusca: Teredinidae) In The Western North Atlantic, Elizabeth Robinson Mcgovern

Dissertations, Theses, and Masters Projects

No abstract provided.

Injection Efficiency Of Bound Modes, Claudio Oliveira Egalon

Dissertations, Theses, and Masters Projects

Previous work on efficiency of light injection into the core of a fiber from a thin film and a bulk distribution of sources in the cladding, have made use of the fields of a weakly guiding fiber. This approximation simplifies the analysis of the power efficiency by introducing universal values for the eigenvalues of different fibers with same {dollar}V{dollar}-number, but can not predict accurately the behavior of the injected light into a fiber with arbitrary differences in indices of refraction. We have used the exact field solution in the expressions of the power efficiency, {dollar}P\sb{lcub}\rm eff{rcub}{dollar}, and analyzed its behavior …

Effects Of Low Dissolved Oxygen On The Macrobenthos Of The Lower Rappahannock River, Chesapeake Bay, Roberto Javier Llanso

Dissertations, Theses, and Masters Projects

The lower Rappahannock River, a subestuary of the Chesapeake Bay, is affected by seasonal low dissolved oxygen events that are intermittent and vary in intensity. Overall, macrobenthic abundance and species number were low, decreasing towards the channel and upriver, where dissolved oxygen concentrations were lowest. Mortality of macrobenthos in early summer was attributed to hypoxia. Species abundances and number declined with the onset of hypoxia, and did not recover in the deep channel until the fall. Tolerance of macrobenthos to hypoxia appeared to be species-specific. Recruitment of hesionid polychaetes occurred in summer during normoxia, but mortality followed during hypoxia, suggesting …

Analysis Of Organic Pollutants In Sediments And Blue Crab (Callinectes Sapidus) Tissues : Final Report To Virginia State Water Control Board, John Greaves

Reports

The Elizabeth River is a highly industrialized waterway that divides the cities of Norfolk and Portsmouth at its confluence with the lower Chesapeake Bay. It is home to the largest Naval base on the East Coast, numerous ship repair facilities, bulk and containerized cargo facilities, industrial and urban activities and wood creosoting (preserving) operations (all except one have been abandoned). This degree of industrialization has resulted in the pollution of the river, with high concentrations of polynuclear aromatic hydrocarbons (PAH, Bieri et al., 1986). A major contributor to the pollution problem has been the wood processing industry which, due to …