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Articles 1 - 13 of 13
Full-Text Articles in Physical Sciences and Mathematics
Response Characteristics Of A Short Range, High Resolution, Digital Sonar Altimeter, Malcolm O. Green, John D. Boon
Response Characteristics Of A Short Range, High Resolution, Digital Sonar Altimeter, Malcolm O. Green, John D. Boon
Reports
The Datasonics Model ASA-920 digital sonar altimeter (DSA) is a compact, high frequency (1 MHz), short range (0.5 to 5 m) underwater sonar device originally designed as an altimeter for submersib1es. Wright et al. (1986) have used the DSA successfully to measure changes in relative bed elevation at a point on the shoreface prior to and during a storm. Fixed to a rigid mounting on the seabed, the DSA produces a digital output that is proportional to the transducer elevation above the bed. The purpose of this report is to describe the response characteristics of the DSA.
Polynuclear Hydrocarbons In Sediments And Clams In The Vicinity Of A Refinery Outfall, P. O. Defur, M. E. Bender, C. W. Su, Et Al
Polynuclear Hydrocarbons In Sediments And Clams In The Vicinity Of A Refinery Outfall, P. O. Defur, M. E. Bender, C. W. Su, Et Al
Reports
The objectives of this study were: 1) to determine whether certain organic substances (polynuclear aromatic hydrocarbons) present in a refinery process water are found in adjacent sediments and bivalves; and 2) to determine the concentrations of the compounds detected.
Distribution Of Submerged Aquatic Vegetation In The Chesapeake Bay And Tributaries And Chincoteague Bay - 1986, Robert Orth, Jim Simons, Judith Capelli, Virginia Carter, Adam A. Frisch, Larry Hindman, Stephen Hodges, Kenneth A. Moore, Nancy Rybicki
Distribution Of Submerged Aquatic Vegetation In The Chesapeake Bay And Tributaries And Chincoteague Bay - 1986, Robert Orth, Jim Simons, Judith Capelli, Virginia Carter, Adam A. Frisch, Larry Hindman, Stephen Hodges, Kenneth A. Moore, Nancy Rybicki
Reports
No abstract provided.
Occurrence And Distribution Of Shell In The Vicinity Of Parker's Rock, Pocomoke Sound, Carl H. Hobbs Iii
Occurrence And Distribution Of Shell In The Vicinity Of Parker's Rock, Pocomoke Sound, Carl H. Hobbs Iii
Reports
This is a summary report on the investigation of the occurrence and distribution of shell in the vicinity of Parker's Rock. Pocomoke Sound. The investigation was performed by the Virginia Institute of Marine Science at the request and with the financial support of the Virginia Marine Resources Commission. The site (Figure 1) was selected. primarily. at the direction of the Commission. acting on the recommendation of its shell-dredging contractor and. secondarily. with supporting reconnaissance seismic data from VIMS.
Sediment Oxygen Demand In Hunting Creek And The Potomac River, Carl F. Cerco
Sediment Oxygen Demand In Hunting Creek And The Potomac River, Carl F. Cerco
Reports
Sediment oxygen demand measures were conducted in Hunting Creek during the period June 17 to August 19, 1986.
Ware Creek Reservoir Release Study : Final Contract Report Submitted To James City County, Virginia Institute Of Marine Science
Ware Creek Reservoir Release Study : Final Contract Report Submitted To James City County, Virginia Institute Of Marine Science
Reports
In Summer, 1986 a field program was conducted in Ware Creek from its mouth at the York River to the dam at Richardson's Millpond. The data collected was combined with flow data from USGS and a tide record from NOAA and was used to calibrate and verify a one-dimensional, real-time, hydrodynamic and salinity intrusion model. The model has been applied to study the effect of the proposed dam and reservoir on the salinity distribution in Ware Creek.
Plume Monitoring Of Rappahannock And York Spit Channels, Baltimore Harbor And Channels: Phase 1, M. Nichols, R. J. Diaz, Et Al
Plume Monitoring Of Rappahannock And York Spit Channels, Baltimore Harbor And Channels: Phase 1, M. Nichols, R. J. Diaz, Et Al
Reports
A major element and concern necessary for evaluating the environmental impact of dredging operations is the dispersion of finegrained dredged material. The turbid plume generated by draghead agitation and by overflow processes from a hopper dredge can dictate the degree of potential adverse effects. Under certain environmental and aesthetic circumstances control of the plume may be advisable. Although turbid plumes produced by open water disposal operations have been evaluated in many investigations (e.g. Barnard. 1978). detailed field assessments of plumes produced by hopper dredging operations are scarce.
Results Of Comparative Studies Of Preservation Techniques For Nutrient Analysis Of Water Samples, Betty A. Salley, Julie G. Bradshaw, Bruse J. Neilson
Results Of Comparative Studies Of Preservation Techniques For Nutrient Analysis Of Water Samples, Betty A. Salley, Julie G. Bradshaw, Bruse J. Neilson
Reports
No abstract provided.
Field Measurements Of Tidal Currents, I664 Tunnel Axis, Hampton Roads, Virginia : A Report To Morrison-Knudsen/Interbeton, Physical Oceanography Division, Virginia Institute Of Marine Science
Field Measurements Of Tidal Currents, I664 Tunnel Axis, Hampton Roads, Virginia : A Report To Morrison-Knudsen/Interbeton, Physical Oceanography Division, Virginia Institute Of Marine Science
Reports
Currents in the region of Newport News Point of the James River were measured at the request of Morrison-Knudsen/Interbeton to examine maximum flood and ebb values during spring tides and determine first order relationships of current strengths and phase lags between this region and Chesapeake Bay Entrance predictions.
A Mark-Recapture Study Of Striped Bass In The James River, Virginia : Annual Report 1987, Joseph G. Loesch, William H. Kriete Jr., Bruce W. Hill
A Mark-Recapture Study Of Striped Bass In The James River, Virginia : Annual Report 1987, Joseph G. Loesch, William H. Kriete Jr., Bruce W. Hill
Reports
Internal anchor tags with external tubes were used to tag 1,986 striped bass in the James River in the Spring of 1987. The total number tagged was adjusted (at this time) to 823 because of observed and suspected tagging mortality. The available stock of striped bass in the Spring contained both young resident fish and mature nonresident fish which left the area of capture after spawning, presumably to migrate north in coastal waters. The exodus of the mature fish after spawning and the absence of a commercial fishery resulted in only 42 tag returns as of Spring 1988. This proportion …
Forested Buffer Zones : Pilot Studies On Efficiency In Reducing Surface And Shallow Groundwater Nutrient Inputs To Estuarine Waters, Carl Hershner
Forested Buffer Zones : Pilot Studies On Efficiency In Reducing Surface And Shallow Groundwater Nutrient Inputs To Estuarine Waters, Carl Hershner
Reports
This study was designed as a pilot study with the intent of identifying important considerations for the design and conduct of an investigation of forested buffer strip performance in Virginia's coastal plain. The approach 3 4' I was to conduct a small preliminary study on a single site using the opportunity to investigate a number of potential sampling methods.
Shoreface And Beach Dynamics Of The Coastal Region From Cape Henry To False Cape, Virginia, L. D. Wright, C. S. Kim, C. S. Hardaway Jr., S. M. Kimball, M. O. Green
Shoreface And Beach Dynamics Of The Coastal Region From Cape Henry To False Cape, Virginia, L. D. Wright, C. S. Kim, C. S. Hardaway Jr., S. M. Kimball, M. O. Green
Reports
The processes which drive the beach and nearshore changes vary considerably in space and time. The spatial variability is the result of modulations of waves and wave induced processes by the complex topography of the shoreface and inner shelf fronting the beaches. In this study we employed a state-of-the-art computer model to evaluate the nature of these modifications and their impact on coastal processes. The model estimates wave modifications by shoaling, refraction, diffraction. and loss of wave energy by frictional interaction with the bottom.
Cabin Point Creek Channelization Study : Final Report, Walter I. Priest Iii, Robert J. Byrne, Bruce J. Neilsen, George R. Thomas
Cabin Point Creek Channelization Study : Final Report, Walter I. Priest Iii, Robert J. Byrne, Bruce J. Neilsen, George R. Thomas
Reports
In the realm of environmental impact assessment and analysis the effects of a proposed project are most often referred to in the subjunctive sense because of the qualifications and probabilities related to these postulations. Seldom does the opportunity present itself to follow a project to fruitition and beyond to, in fact, determine the validity of the assumptions made in arriving at the potential impacts of a project. Even less often is it possible to monitor a project from prior to construction to several years after the project has been completed to ascertain the exact nature of the projects impacts, compare …