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Articles 601 - 630 of 797
Full-Text Articles in Physical Sciences and Mathematics
Tributyltin In Whole Water And Sediment Collected From Marinas And The Hampton Roads Area In The Southern Chesapeake Bay : A Final Report, Donna J. Westbrook, Ellen J. Travelstead, Francois A. Espourteille, Charles D. Rice, Robert J. Huggett
Tributyltin In Whole Water And Sediment Collected From Marinas And The Hampton Roads Area In The Southern Chesapeake Bay : A Final Report, Donna J. Westbrook, Ellen J. Travelstead, Francois A. Espourteille, Charles D. Rice, Robert J. Huggett
Reports
This report presents data gathered in a program designed to monitor tributyltin (TBT) levels in water and sediment from areas in the southern Chesapeake Bay which experience high boating activities. The concentrations reported will hopefully give an insight into the extent and magnitude of TBT contamination in these areas.
Nearshore And Surf-Zone Morphodynamics : A Global Environmental Model For Predicting Hazards And Changes, L. D. Wright, N. C. Shi, John D. Boon
Nearshore And Surf-Zone Morphodynamics : A Global Environmental Model For Predicting Hazards And Changes, L. D. Wright, N. C. Shi, John D. Boon
Reports
The long-term goal of the project has been to develop improved, accurate predictability of nearshore, surf zone, and beach hydrodynamic and morphologic assemblages, based on lucidation of the universal principles governing nearshore and surf zone morphodynamic behavior.
Nearshore And Surf-Zone Morphodynamics: A Global Environmental Model For Predicting Hazards And Changes. Appendix 6. Standing Waves On A Pronounced Bar Trough Beach, Nungjane C. Shi, L. D. Wright
Nearshore And Surf-Zone Morphodynamics: A Global Environmental Model For Predicting Hazards And Changes. Appendix 6. Standing Waves On A Pronounced Bar Trough Beach, Nungjane C. Shi, L. D. Wright
Reports
The hypothesis that a pronounced bar-trough surf zone topography favors resonance of standing waves with antinodes located over the bar is examined. Numerical and field investigations of standing waves in a bar-trough surf zone suggest a selective trapping of wave energy at specific resonant frequencies in the subharmonic and the high frequency infragravity bands and a possible suppression of lower frequencies. The resonant frequencies predicted by the numerical model remain fairly constant throughtout the tidal cycle due to the small tidal range typically associated with a bar-trough beach. Cross-shore bar migration changes the resonant frequencies. Numerical simulations show that an …
Baltimore Harbor And Channels Aquatic Benthos Investigations : Final Technical Report, Robert J. Diaz, Linda C. Schaffner, Robert J. Byrne, Robert A. Gammisch
Baltimore Harbor And Channels Aquatic Benthos Investigations : Final Technical Report, Robert J. Diaz, Linda C. Schaffner, Robert J. Byrne, Robert A. Gammisch
Reports
This report describes work performed by the Virginia Institute of Marine Science, School of Marine Science of the College of William and Mary, Gloucester Point, VA, to document the existing preoperational conditions at four locations in the Chesapeake Bay selected as possible dredged material disposal areas for the deepening of the Baltimore Channel. The work was sponsored by the Baltimore District Corps of Engineers.
The objectives of this work were at each of the four potential disposal sites:
1 -document the surface (0-15 em) sediment conditions spatially and temporally
2 - document macrobenthic communities spatially and temporally.
3 - empty …
First Annual Progress Report For The Period July 1 , 1984 - June 30, 1985, Chesapeake Bay Research And Submerged Aquatic Vegetation Initiatives, Virginia Institute Of Marine Science
First Annual Progress Report For The Period July 1 , 1984 - June 30, 1985, Chesapeake Bay Research And Submerged Aquatic Vegetation Initiatives, Virginia Institute Of Marine Science
Reports
No abstract provided.
Richmond Crater James River Water Quality Management Program, Final Report 1984-85 And Summary, Toxic Organics In Sediments : A Final Report To Richmond Regional Planning District, C. L. Smtih, P. O. Defur, R. J. Huggett
Richmond Crater James River Water Quality Management Program, Final Report 1984-85 And Summary, Toxic Organics In Sediments : A Final Report To Richmond Regional Planning District, C. L. Smtih, P. O. Defur, R. J. Huggett
Reports
The following report contains detailed results of analyses of sediment grabs and cores from the James and Appomattox rivers and some nearby locations for a spectrum of organic toxics. Some data has been previously reported in interim progress reports, but will be included for completeness. A study of variability of replicate samples taken at a single station (JR4). not included in the proposal, presents possible limitations of interpretation of temporal and station to station results. Finally, a comprehensive summary of toxic organics in the sediments of the James River and certain tributarjes over a two-year period will be presented.
Distribution Of Submerged Aquatic Vegetation In The Chesapeake Bay And Tributaries - 1984, Robert Orth, Jim Simons, Ruth Allaire, Virginia Carter, Larry Hindman, Kenneth Moore, Nancy Rybicki
Distribution Of Submerged Aquatic Vegetation In The Chesapeake Bay And Tributaries - 1984, Robert Orth, Jim Simons, Ruth Allaire, Virginia Carter, Larry Hindman, Kenneth Moore, Nancy Rybicki
Reports
No abstract provided.
Monthly Reports On The State Of Rivers 1985, Albert Kuo
Monthly Reports On The State Of Rivers 1985, Albert Kuo
Reports
Chiefly graphs showing monthly salinity, temperature, dissolved oxygen distributions at slackwater for the James, York, Pamunkey, and Rappahannock Rivers.
1985: April-July; September - November
Effect Of Temperature And Dissolved Oxygen On Sediment-Water Nutrient Flux, C. F. Cerco
Effect Of Temperature And Dissolved Oxygen On Sediment-Water Nutrient Flux, C. F. Cerco
Reports
A series of experiments was conducted in order to determine the influence of water-column temperature and dissolved oxygen on sediment-water nutrient flux. Three nutrients were considered: ammoniurn nitrogen, nitrate nitrogen, and ortho phosphorus. Results of the experiments indicated that nutrient concentration in the overlying water had to be considered, as well as temperature and dissolved oxygen, as an independent variable which affected sediment-water nutrient flux.
Sediment-Water Column Exchanges Of Nutrients And Oxygen In The Tidal James And Appomattox Rivers, Carl F. Cerco
Sediment-Water Column Exchanges Of Nutrients And Oxygen In The Tidal James And Appomattox Rivers, Carl F. Cerco
Reports
Fluxes between the sediments and overlying water of ammonium, nitrate, total phosphorus, ortho phosphorus, and dissolved oxygen have been measured in the tidal James and Appomattox Rivers, Va. A total of 68 nutrient flux measures, 203 oxygen flux measures, and 18 control measures were collected in the summer months, 1983 and 1984.
Ammonium is predominantly released from the sediments at a mean rate of 9.82 mg/m /hr. Nitrate is predominantly taken up by the sediments at a mean rate of 1.53 mg/m /hr. Total phosphorus is taken up by the sediments at a mean rate of 1.67 mg/m /hr. Ortho …
Operation Manual For The Vims Combined Hydrodynamic-Ecosystem Model (Hem), Virginia Institute Of Marine Science
Operation Manual For The Vims Combined Hydrodynamic-Ecosystem Model (Hem), Virginia Institute Of Marine Science
Reports
Since about 1970, VIMS has been developing water quality simulation models for the Virginia State Water Control Board under the Cooperative State Agencies (CSA) agreement. Under this agreement, VIMS has conducted field programs and developed and validated a number of water quality models. In order to make this accumulated experience available to the State Water Control Board and others, VIMS has prepared a users' manual and sample cases for the combined hydrodynamic-ecosystem model (HEM).
Summary Report On The Calibration Of The Water Quality Models Of The Chesapeake Bay System, H. S. Chen, Paul V. Hyer, Y. Unkulvasapaul, Bruce Neilson
Summary Report On The Calibration Of The Water Quality Models Of The Chesapeake Bay System, H. S. Chen, Paul V. Hyer, Y. Unkulvasapaul, Bruce Neilson
Reports
The intended use of the water quality model was to predict the levels of important water quality parameters. in particular the dissolved oxygen levels and the algal populations. for alternative sets of nutrient loadings. The goals of the present modelling study were to apply appropriate models to the Chesapeake Bay system. to adjust the models so that they accurately simulated conditions in the prototype and to use those models to predict conditions under a number of nutrient loading scenarios. This report provides a summary of the work done to satisfy the first two of those three objectives.
Virginia Institute Of Marine Science Plan In Support Of The Chesapeake Bay Research And Submerged Aquatic Vegetation Initiatives Of The Commonwealth Of Virginia, Virginia Institute Of Marine Science
Virginia Institute Of Marine Science Plan In Support Of The Chesapeake Bay Research And Submerged Aquatic Vegetation Initiatives Of The Commonwealth Of Virginia, Virginia Institute Of Marine Science
Reports
No abstract provided.
Final Report To The Coastal Erosion Abatement Commission, Commonwealth Of Virginia Concerning The Inventory Of Sand Supplies In The Southern Chesapeake Bay, Carl H. Hobbs Iii, Robert J. Byrne, Robert A. Gammish
Final Report To The Coastal Erosion Abatement Commission, Commonwealth Of Virginia Concerning The Inventory Of Sand Supplies In The Southern Chesapeake Bay, Carl H. Hobbs Iii, Robert J. Byrne, Robert A. Gammish
Reports
This final report to the Coastal Erosion Abatement Commission concerning the inventory of sand supplies in the southern portion of Chesapeake Bay is a continuation of the work reported on in September 1981 (Byrne et al). The report includes technical appendices in addition to the general text.
Vegetative Erosion Control Project : Final Report, C. Scott Hardaway Jr., George Thomas, Andrew W. Zacherle, B. Keith Fowler
Vegetative Erosion Control Project : Final Report, C. Scott Hardaway Jr., George Thomas, Andrew W. Zacherle, B. Keith Fowler
Reports
The Vegetative Erosion Control (VEC) project is a four-year study with coordinated efforts by the Virginia Soil and Water Conservation Commmission (VS&WCC) through their Shoreline Erosion Advisory Service (SEAS), the Soil Conservation Service (SCS) and the Virginia Institute of Marine Science (VIMS). Initial funding was appropriated in 1980 following the recommendation of the Coastal Erosion Abatement Commission and contracted out to the SCS and VIMS by the VS&WCC, the lead agency. (...)
The purpose of the VEC project is to supplement previous research with detailed site analysis of the early stages of marsh development and to more precisely define the …
Trace Organic Analyses Of Effluent Waters From A Model Slurry Pipeline Carrying Appalachian Bituminous Coal : Final Report, P. O. Defur, W. G. Macintyre
Trace Organic Analyses Of Effluent Waters From A Model Slurry Pipeline Carrying Appalachian Bituminous Coal : Final Report, P. O. Defur, W. G. Macintyre
Reports
Effluent waters from a model coal slurry pipeline have been analyzed for trace dissolved organic compounds. The model pipeline was operated under conditions simulating those proposed for a slurry pipeline from the region of Bristol to Hampton Roads, Virginia. Acidic, neutral and basic organic compounds in the separated waters were determined. Concentrations of individual compounds detected were generally less than 0.5 ppb and never exceeded 6 ppb. Adsorption experiments using coal slurry sorbents indicate that coal particles act as sorbing surfaces under coal slurry pipeline transport conditions.
A Study Of Long-Term Environmental Fluctuations In The Chesapeake Bay Region, Reidar S. Leinebo, David A. Evans
A Study Of Long-Term Environmental Fluctuations In The Chesapeake Bay Region, Reidar S. Leinebo, David A. Evans
Reports
A time series of monthly mean values of temperature measurements (1952-1981) for Gloucester Point, Virginia, U.S.A. and Vardo In Northern Norway are described and the results of an eigenfunction analysis are presented. Seasonal, year-to-year and long term changes of salinlty measurements (1960-1977) for Gloucester Point and monthly mean stream-flow values (1951-1982) are also described. Commerclal Catch data from Virginia for menhaden, bluefish and Atlantic croaker shows reasonable correlation with cllmatlc changes.
The time around 1965 was a cold period with high sallnlty and low streamflow. The same period was also cold In Northern Norway (Europe). Around 1974 was a period …
Ware River Intensive Watershed Study - Project Summary, Gary F. Anderson, Cindy Bosco, Bruce Neilson
Ware River Intensive Watershed Study - Project Summary, Gary F. Anderson, Cindy Bosco, Bruce Neilson
Reports
The Ware River Intensive Watershed Study includes examinations of runoff from small catchments, instream transport of runoff, and their impacts on estuarine water quality. Runoff quantity and quality were monitored for row crop, residential and forested lands in the Ware basin for the period of October 1979 to July 1981. Loading rates have been calculated for both baseflow and stormflow contributions at each study site.
Pamunkey River Slack Water Data Report : Temperature, Salinity, Dissolved Oxygen, 1970 - 1980, T. J. Brooks
Pamunkey River Slack Water Data Report : Temperature, Salinity, Dissolved Oxygen, 1970 - 1980, T. J. Brooks
Reports
This report contains station locations, survey schedules, field procedures, sample handling procedures, and data reduction and storage procedures. In addition, 11 years of contoured temperature, salinity, and dissolved oxygen data is presented.
York River Slack Water Data Report : Temperature, Salinity, Dissolved Oxygen, 1971 - 1980, T. J. Brooks
York River Slack Water Data Report : Temperature, Salinity, Dissolved Oxygen, 1971 - 1980, T. J. Brooks
Reports
The slack water survey program, provides an extended series of temperature, salinity, dissolved oxygen and nutrient measurements along the York River. These have been used to:
1) calibrate, verify, and update mathematical models; 2) provide a baseline against which effects of unusual events have been measured; and could be used to: 3) establish annual and longer period "climatological" trends in response to changing natural phenomena and man-made modifications to the estuary; 4) provide a basis against which fluctuations in biota could be compared.
This report contains station locations, survey schedules, field procedures, sample handling procedures, and data reduction and storage …
Mattaponi River Slack Water Data Report : Temperature, Salinity, Dissolved Oxygen, 1970 - 1980, T. J. Brooks
Mattaponi River Slack Water Data Report : Temperature, Salinity, Dissolved Oxygen, 1970 - 1980, T. J. Brooks
Reports
This report contains station locations, survey schedules, field procedures, sample handling procedures, and data reduction and storage procedures. In addition, 9 years of contoured temperature, salinity, and dissolved oxygen data is presented.
Rappahannock River Slack Water Data Report: Temperature, Salinity, Dissolved Oxygen 1970-1980, T. J. Brooks
Rappahannock River Slack Water Data Report: Temperature, Salinity, Dissolved Oxygen 1970-1980, T. J. Brooks
Reports
This report contains station locations, survey schedules, field procedures, sample handling procedures, and data reduction and storage procedures. In addition, 11 years of contoured temperature, salinity, and dissolved oxygen data is presented.
Interpretation Of Water Quality Data From The Nansemond And Chuckatuck Estuaries With Respect To Point And Nonpoint Sources Of Pollution : A Report To The Hampton Roads Water Quality Agency, Cindy L. Bosco, Bruce J. Neilson
Interpretation Of Water Quality Data From The Nansemond And Chuckatuck Estuaries With Respect To Point And Nonpoint Sources Of Pollution : A Report To The Hampton Roads Water Quality Agency, Cindy L. Bosco, Bruce J. Neilson
Reports
.Recently the Nansemond and Chuckatuck basins have been designated as a Rural Clean Water Program demonstration area. This designation means that federal funds will be available to share the costs incurred by farmers when they implement the so-called Best Management Practices on their croplands, pastures, and feedlots. One requirement of the federal funding agency is that local governmental bodies monitor the quality of the waters in the area to document changes. One element in that monitoring effort is the study of conditions in the estuaries of these two water bodies. The Hampton Roads Water Quality Agency contracted with VIMS to …
Monthly Report On The State Of Rivers 1983, Albert Kuo
Monthly Report On The State Of Rivers 1983, Albert Kuo
Reports
Chiefly graphs showing monthly salinity, temperature, dissolved oxygen distributions at slackwater for the James, York, Pamunkey, and Rappahannock Rivers.
1983: March-April, May, June-November
James River Slack Water Data Report : Temperature, Salinity, Dissolved Oxygen, 1971 - 1980, T. J. Brooks, C. S. Fang
James River Slack Water Data Report : Temperature, Salinity, Dissolved Oxygen, 1971 - 1980, T. J. Brooks, C. S. Fang
Reports
The slack water survey program, which has been supp orted by the State Water Control Board and the Virginia Institute of Marine Science under the Cooperative State Agencies program, provides an extended series of tem perature, salinity, dissolved oxygen and nutrient measurements along the James River. These have been used to: 1) establish, verify, and update mathe matical and physical hydraulic models; 2) provide a baseline against which effects of unusual events have been measured; and could be used to: 3) es tablish annu al and longer period 11 climatological" trends in response to changing natural phenomena and man-made modifica …
The Nature And Extent Of Trace Element Contamination Associated With Fly-Ash Disposal Sites In The Chisman Creek Watershed, Bruce J. Neilson, George C. Grant, Gary F. Anderson, Cindy L. Bosco
The Nature And Extent Of Trace Element Contamination Associated With Fly-Ash Disposal Sites In The Chisman Creek Watershed, Bruce J. Neilson, George C. Grant, Gary F. Anderson, Cindy L. Bosco
Reports
This study was conducted by the Virginia Institute of Marine Science (VIMS) and the Virginia Associated Research Campus (VARC), both branches of the College of William and Mary, to document the nature, extent, and severity of environmental contamination by trace elements from the landfill disposal of fly-ash within the Chisman Creek watershed. Previous work in the area demonstrated that some metals were apparently mobile in the groundwater, and that two nearby household wells were contaminated (Va. SWCB, 1981). These short term studies were limited to the testing of only a few selected contaminants in wells near the fly-ash pits. The …
Toxic Organic Compounds In Surface Sediments From Elizabeth And Patapsco Rivers And Estuaries, Rudolph H. Bieri, Chris Hein, Robert J. Huggett, Philip Shou, Harold Slone, Craig Smith, Chih-Wu Su
Toxic Organic Compounds In Surface Sediments From Elizabeth And Patapsco Rivers And Estuaries, Rudolph H. Bieri, Chris Hein, Robert J. Huggett, Philip Shou, Harold Slone, Craig Smith, Chih-Wu Su
Reports
This study is an extension of a Chespeake Bay-wide analysis of toxic organic substances into the Elizabeth and Patapsco River subestuaries. Twenty-eight surface sediment samples from the.Elizabeth River and 40 surface sediment samples from the Patapsco, were analyzed in detail for the presence of mainly aromatic and polar organic compounds. Approximately 310 distinct compounds were identified by gas chromatography-mass spectrometry in the Elizabeth River samples, and about 480 in the Patapsco. Total aromatic concentrations ranged from 440,000 to 3,100 ppb in the Elizabeth and from 2.7 x 106 to 6100 ppb in the Patapsco. Similar to observation in the.Chesapeake Bay, …
Management Practice Evaluation For Urban Areas In The Hampton Roads Vicinity: A Report To Hampton Roads Water Quality Agency, Gary F. Anderson, Bruce J. Neilson, Donald H. Campbell
Management Practice Evaluation For Urban Areas In The Hampton Roads Vicinity: A Report To Hampton Roads Water Quality Agency, Gary F. Anderson, Bruce J. Neilson, Donald H. Campbell
Reports
Data was collected by the Virginia Institute of Marine Science from study sites in the designated Hampton Roads 208 area, and information from other studies published in the literature were used to examine the change in pollutant loadings brought about by the presence of management practices in urban test watersheds. The focus was on nutrients, BOD, and suspended solids.
Hydrocarbon Fuel Chemistry : Sediment Water Interaction, William G. Macintyre, C. L. Smith, P. O. Defur, C. W. Su
Hydrocarbon Fuel Chemistry : Sediment Water Interaction, William G. Macintyre, C. L. Smith, P. O. Defur, C. W. Su
Reports
The objective of this program was to determine the effect of sediments on aqueous solutions of selected United States Air Force (USAF} hydrocarbon fuels. Effects of sediment type, organic carbon content, pH, temperature and salinity on interaction of dissolved hydrocarbons with sediment were studied. The results of this work can be used to estimate the role of sediment hydrocarbon interaction terms in fate models of aqueous systems, such as the Environmental Protection Agency "EXAMS" model.
Seasat Sar Test Of The Virginian Sea Wave Climate Model, John C. Munday Jr., Christopher S. Welch, George R. Mapp
Seasat Sar Test Of The Virginian Sea Wave Climate Model, John C. Munday Jr., Christopher S. Welch, George R. Mapp
Reports
Coastal wave refraction imaged by the Seasat Synthetic Aperture Radar is compared to simulations produced by the Virginian Sea Wave Climate Model. Seasat SAR passes 974 at Cape Hatteras, and 974 and 1404 at Long Island, were examined using OFT and ZTS methods. Results generally confirm the validity of linear wave theory in modeling of shallow-water wave refraction --roughly half the deviations between VSWCM and SAR data for direction and wavelength are within 2 degrees and 10 meters. Convergence of wave orthogonals is found in predicted caustic regions. Available bathymetric data were adequate for the analysis. Some details in the …