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Articles 721 - 750 of 1835

Full-Text Articles in Physical Sciences and Mathematics

Effects Of Seagrass Biology On Water Quality In Shallow Regions Of The Lower Chesapeake Bay : Final Report, Kenneth A. Moore Jan 1997

Effects Of Seagrass Biology On Water Quality In Shallow Regions Of The Lower Chesapeake Bay : Final Report, Kenneth A. Moore

Reports

The changes in water quality within shallow water regions of the lower Chesapake Bay was compared seasonally from permanent stations located along transects across vegetated and unvegetated sites in shoal regions of the lower Chesapeake Bay. The effect of the seagrass bed on conditions inside compared to outside of the bed varied seasonally and could be related to bed biomass and develoment. During spring (April-June) the rapidly growing seagrass bed was a sink for nutrients, suspended inorganic particles and phytoplankton, while during the summer, as bed dieback progressed, resuspension and release of nutrients were observed. Reductions in suspended particle concentrations …


Organic Carbon Abundance, Distribution And Metabolism At The Oyster, Virginia Study Site, Elizabeth Canuel, Iris C. Anderson, Craig Tobias Jan 1997

Organic Carbon Abundance, Distribution And Metabolism At The Oyster, Virginia Study Site, Elizabeth Canuel, Iris C. Anderson, Craig Tobias

Reports

This report describes a pilot study conducted at the DOE Subsurface Science Program's study site in Oyster, VA. The objective of this study was to examine whether 2 organic matter associated with the solid and dissolved phases was labile enough to support microbial activity. Organic matter availability was assessed in two ways: (1) by quantifying the amount and distribution of total organic carbon (TOC) associated with the solid phase and (2) laboratory experiments to examine the utilization of dissolved organic matter by measuring total microbial respiration. In addition to assessing total respiration, we specifically addressed organic matter respiration via denitrification. …


Body Burden Of Polycyclic Aromatic Hydrocarbons And Tributyltin In Hard Clams, Mercenaria Mercenaria From The Elizabeth River, Va, Morris H. Roberts, Michael A. Unger Jan 1997

Body Burden Of Polycyclic Aromatic Hydrocarbons And Tributyltin In Hard Clams, Mercenaria Mercenaria From The Elizabeth River, Va, Morris H. Roberts, Michael A. Unger

Reports

The Elizabeth River, contaminated with PAH, TBT, and heavy metals, is potentially home to a variety of estuarine invertebrates of commercial importance, notably oysters, hard clams, and crabs. Harvestable oysters have virtually disappeared from the system, but it has been rumored among commercial fishermen that a population of small (little neck to cherrystone) hard clams (Mercenaria mercenaria) exists within the Elizabeth River system. These clams are of serious interest to commercial clammers in the area as a previously unharvested source of market-size clams. Crabs of a harvestable size are also reasonably abundant throughout this river according to local fishermen.

The …


State Of Tampa Bay 1996, J.O.R. Johansson Jan 1997

State Of Tampa Bay 1996, J.O.R. Johansson

Reports

The amount of phytoplankton present in Tampa Bay waters can be estimated from measurements of the green plant pigment chlorophyll-a. Phytoplankton is one of several major forms of plants that exist in Tampa Bay and most other estuaries. Other major plant types are submerged seagrass, macro-algae and benthic micro-algae. The different plants can be viewed as being in competition with each other for required resources, such as light and nutrients. Studies conducted in urbanized estuaries have shown that excessive loading of nitrogen generally is accompanied by an increase of phytoplankton and macro-algae, including epiphytic and drift macro-algae, and by a …


Development Of Monitoring Protocol For Created Wetlands : Project Summary For 1997, James E. Perry Jan 1997

Development Of Monitoring Protocol For Created Wetlands : Project Summary For 1997, James E. Perry

Reports


Appx. 1. Annotated bibliography -- Appx. 2. Field data sheet - Appx. 3.Monitoring protocol manual for created wetlands: draft manual.


Distribution Of Submerged Aquatic Vegetation In The Chesapeake Bay And Tributaries And The Coastal Bays - 1996, Robert J. Orth, Judith F. Nowak, David J. Wilcox, Jennifer R. Whiting, Leah S. Nagy Jan 1997

Distribution Of Submerged Aquatic Vegetation In The Chesapeake Bay And Tributaries And The Coastal Bays - 1996, Robert J. Orth, Judith F. Nowak, David J. Wilcox, Jennifer R. Whiting, Leah S. Nagy

Reports

SA V distribution data in this report are presented and discussed based on the segmentation scheme adopted by the Chesapeake Bay Program (Flemer et al., 1983) and described briefly in the Methods section of this report. This zonation scheme (Upper, Middle, and Lower zones) for Chesapeake Bay, which accommodates the Chesapeake Bay Program segmentation boundaries, was adapted from that used in previous SAV distribution reports (i.e., Orth et al., 1994) and established by Orth and Moore ( 1982), then modified by Orth et al., ( 1989). The 1996 data were edgematched using ARC/INFO GIS software, as were all the historical …


Virginia's Commercial Fishing Industry: Its Economic Performance And Contributions, James Kirkley Jan 1997

Virginia's Commercial Fishing Industry: Its Economic Performance And Contributions, James Kirkley

Reports

No abstract provided.


Saltwater Angling And Its Economic Importance To Virginia, James Kirkley, David Kerstetter Jan 1997

Saltwater Angling And Its Economic Importance To Virginia, James Kirkley, David Kerstetter

Reports

No abstract provided.


Virginia Game Fish Tagging Program Annual Report 1996, Cm Bain Iii, John A. Lucy Jan 1997

Virginia Game Fish Tagging Program Annual Report 1996, Cm Bain Iii, John A. Lucy

Reports

The Virginia Game Fish Tagging Program (VGFfP), a cooperative project of the Virginia Marine Resources Commission and the Virginia Institute of Marine Science (VIMS), enjoyed its second full year of operation in 1996. Participation in the project, which is funded with revenues generated by Virginia's saltwater recreational fishing license, nearly doubled with 127 anglers volunteering as taggers compared to 64 in 1995.


Public Beach Assessment Report Gloucester Point Public Beach, Gloucester County, Virginia, Donna A. Milligan, C. Scott Hardaway Jr., George R. Thomas Nov 1996

Public Beach Assessment Report Gloucester Point Public Beach, Gloucester County, Virginia, Donna A. Milligan, C. Scott Hardaway Jr., George R. Thomas

Reports

Gloucester Point Public Beach is located at the southern end of Gloucester County, Virginia on the York River. It is a southeastward facing shoreline about 960 ft long and it is part of a larger stretch of moderately low shore between Sarah Creek and the George P. Coleman Bridge. While no shoreline improvement projects have taken place at the public beach, shore protection projects updrift and including the Virginia Institute of Marine Science (VIMS) affect it. In 1983, erosion along the shoreline at VIMS just updrift of the public beach led to the installation of a riprap revetment in front …


Yellow Sea & East China Sea Bibliography, Nicole D. Scott, Patricia T. Carrier, John D. Milliman Nov 1996

Yellow Sea & East China Sea Bibliography, Nicole D. Scott, Patricia T. Carrier, John D. Milliman

Reports

No abstract provided.


Distribution Of Submerged Aquatic Vegetation In The Chesapeake Bay And Tributaries And Chincoteague Bay - 1995, Robert J. Orth, Judith F. Nowak, Gary F. Anderson, David J. Wilcox, Jennifer R. Whiting, Leah S. Nagy Nov 1996

Distribution Of Submerged Aquatic Vegetation In The Chesapeake Bay And Tributaries And Chincoteague Bay - 1995, Robert J. Orth, Judith F. Nowak, Gary F. Anderson, David J. Wilcox, Jennifer R. Whiting, Leah S. Nagy

Reports

No abstract provided.


Public Beach Assessment Report Yorktown Public Beach, Yorktown, Virginia, Donna A. Milligan, C. Scott Hardaway Jr., George R. Thomas Nov 1996

Public Beach Assessment Report Yorktown Public Beach, Yorktown, Virginia, Donna A. Milligan, C. Scott Hardaway Jr., George R. Thomas

Reports

No abstract provided.


Detritus: Mother Nature's Rice Cake, Pamela Mason, Lyle M. Varnell, Virginia Institute Of Marine Science, Wetlands Program Oct 1996

Detritus: Mother Nature's Rice Cake, Pamela Mason, Lyle M. Varnell, Virginia Institute Of Marine Science, Wetlands Program

Reports

No abstract provided.


Seagrass In Tampa Bay: Historic Trends And Future Expectations, J.O. R. Johansson, T. Ries Sep 1996

Seagrass In Tampa Bay: Historic Trends And Future Expectations, J.O. R. Johansson, T. Ries

Reports

In this bay segment, seagrass cover has increased from near zero in 1984 to about 40 ha in 1996. The seagrass expansion apparently started in response to water quality improvements which occurred more than a decade ago and which in turn followed a large reduction in nitrogen loading form primarily domestic and industrial point-sources. Although this nutrient reduction occurred almost two decades ago it is most likely still contributes to the current seagrass expansion.


Methods Of Risk Analysis: Traditional And Ecological Approaches, John Buie, Virginia Institute Of Marine Science, Wetlands Program Aug 1996

Methods Of Risk Analysis: Traditional And Ecological Approaches, John Buie, Virginia Institute Of Marine Science, Wetlands Program

Reports

No abstract provided.


Advances In Wetland Status And Trends Monitoring Cumulative Error Comparisons, Stacie A.C. Nelson, Virginia Institute Of Marine Science, Wetlands Program Jun 1996

Advances In Wetland Status And Trends Monitoring Cumulative Error Comparisons, Stacie A.C. Nelson, Virginia Institute Of Marine Science, Wetlands Program

Reports

No abstract provided.


A Mechanistic Management-Oriented Water Quality Model For Tampa Bay Final Report, Asci Corporation, James L. Martin, Pei F. Wang, Tim Wool May 1996

A Mechanistic Management-Oriented Water Quality Model For Tampa Bay Final Report, Asci Corporation, James L. Martin, Pei F. Wang, Tim Wool

Reports

This report summarizes the parameterization, calibration, testing, and an initial application of the mechanistic water quality model.


Restoration And Creation Of Forested Wetlands: A Guide, Cathy Palmintier, Bonny Lee Appleton, Virginia Institute Of Marine Science, Wetlands Program Apr 1996

Restoration And Creation Of Forested Wetlands: A Guide, Cathy Palmintier, Bonny Lee Appleton, Virginia Institute Of Marine Science, Wetlands Program

Reports

No abstract provided.


Results Of The City Of Tampa Surface Water Compliance Monitoring Program For The Year 1995 And Examination Of Long-Term Water Quality And Biological Indicator Trends In Hillsborough Bay, City Of Tampa Department Of Sanitary Sewers Mar 1996

Results Of The City Of Tampa Surface Water Compliance Monitoring Program For The Year 1995 And Examination Of Long-Term Water Quality And Biological Indicator Trends In Hillsborough Bay, City Of Tampa Department Of Sanitary Sewers

Reports

This report is submitted to the Florida Department of Environmental Protection (FDEP) to satisfy the requirements set forth in specific condition No. 14 of the Howard F. Curren WWTP permit No. D029-184532B. The report is based on data obtained by the City of Tampa (COT) compliance water quality monitoring program approved under construction permit DC29-152799. The report also includes examination of long-term trends for water quality parameters and biological indicators collected by the City of Tampa Bay Study Group and the Environmental Protection Commission of Hillsborough County (EPC).


Seagrass And Caulerpa Monitoring In Hillsborough Bay Seventh Annual Report, City Of Tampa Department Of Sanitary Sewers Mar 1996

Seagrass And Caulerpa Monitoring In Hillsborough Bay Seventh Annual Report, City Of Tampa Department Of Sanitary Sewers

Reports

This is the seventh annual report to FDER to satisfy the requirements set forth in specific condition #14 of FDER construction permit DO29-1845321B.

The City of Tampa, Bay Study Group (BSG), has monitored the effects of sewage pollution abatement in Hillsborough Bay since 1976. Within the last decade, water quality improvements and evidence of minor seagrass revegetation in Hillsborough Bay prompted the BSG to initiate a seagrass study to compliment other programs assessing the environmental status of Hillsborough Bay.


State Of Tampa Bay 1995, Tampa Bay Regional Planning Council (Tbrpc), Agency On Bay Management Mar 1996

State Of Tampa Bay 1995, Tampa Bay Regional Planning Council (Tbrpc), Agency On Bay Management

Reports

This, the ninth "State of Tampa Bay" report, is one of the most comprehensive ever produced. It includes updates on a myriad of programs and projects undertaken or ongoing during 1995. Prepared in accordance with the adopted rules of the Agency on Bay Management and funded by the Tampa Bay Regional Planning Council, it includes a summary of issues addressed by the Agency this year.


Plant Adaptations To Saturated Soils And The Formation Of Hypertrophied Lenticels And Adventitious Roots In Woody Species, Kirk J. Havens, Virginia Institute Of Marine Science, Wetlands Program Feb 1996

Plant Adaptations To Saturated Soils And The Formation Of Hypertrophied Lenticels And Adventitious Roots In Woody Species, Kirk J. Havens, Virginia Institute Of Marine Science, Wetlands Program

Reports

No abstract provided.


Investigations Of Isolated Sand Shoals And Associated Deposits, Virginia Inner Shelf : Final Contract Report Primarily In The Form Of A Data Report, C. H. Hobbs Iii Jan 1996

Investigations Of Isolated Sand Shoals And Associated Deposits, Virginia Inner Shelf : Final Contract Report Primarily In The Form Of A Data Report, C. H. Hobbs Iii

Reports

This report primarily serves to present minimally interpreted data from a tight spaced set of high-resolution, seismic-reflection, sub-bottom profiles obtained during the summer of 1992. The profiles were run in the inner continental shelf adjacent to Virginia Beach, Virginia as part of an investigation of offshore sounds potentially usable in beach nourishment and hurricane protection projects along Virginia's Atlantic shore south of the mouth of Chesapeake Bay. Figure 1 depicts the general study area.

Berquist and Gomillion (1993) presented an interpretation of a small portion of the work. A larger, interpretive report (Hardaway et al., 1995) also utilizes information from …


The Use Of Thermal Imagery In The Aerial Survey Of Panthers (And Other Animals) In The Florida Panther National Wildlife Refuge And The Big Cypress National Preserve, Kirk J. Havens, Edward Sharp Jan 1996

The Use Of Thermal Imagery In The Aerial Survey Of Panthers (And Other Animals) In The Florida Panther National Wildlife Refuge And The Big Cypress National Preserve, Kirk J. Havens, Edward Sharp

Reports

No abstract provided.


Estimated Nitrogen Fluxes And Nitrogen-Chlorophyll Relationships In Tampa Bay, 1985-1994, Gerold Morrison, Anthony Janicki, David Wade, James Martin, Gabriel Vargo, Roger Johansson Jan 1996

Estimated Nitrogen Fluxes And Nitrogen-Chlorophyll Relationships In Tampa Bay, 1985-1994, Gerold Morrison, Anthony Janicki, David Wade, James Martin, Gabriel Vargo, Roger Johansson

Reports

Cultural eutrophication driven by anthropogenic nutrient loadings has been identified as a priority problem affecting the water quality of Tampa Bay. Bay management programs therefore wish to control future nutrient loads, an effort that will be complicated by the continuing population growth projected for the watershed in coming decades. The eutrophication management efforts is "resource-based" seeking to maintain water clarity in the bay that is adequate to support seagrass at target acreage levels. Among the factors affecting water clarity, anthropogenic nitrogen loadings and corresponding increases in phytoplankton density appear most amenable to management.


Virginia Game Fish Tagging Program Annual Report 1995, Cm Bain Iii, John A. Lucy Jan 1996

Virginia Game Fish Tagging Program Annual Report 1995, Cm Bain Iii, John A. Lucy

Reports

The Virginia Came Fish tagging Program (VGFTP) was established in 1995 as an ongoing, cooperative project of the Virginia Marine Resources Commission and the Virginia Institute of Marine Science of the College of William and Mary The project is funded with revenues generated by Virginia's marine recreational fishing license.


The Study Of The Resistance And Stability Of Vegetation Ecosystem Plant Groupings In Flood Control Channels: Vol. 1, William Rahmeyer, David Werth Jan 1996

The Study Of The Resistance And Stability Of Vegetation Ecosystem Plant Groupings In Flood Control Channels: Vol. 1, William Rahmeyer, David Werth

Reports

Preface: The following report was prepared by the utah Water Research Laboratory of Utah State University in Logan, Utah. Volume 1 of the UWRL report USU--400A contains the data summary and conclusions of flow tests conducted with different plant types and ecosystem groupings of shrubs and woody vegetation in the hydraulics flumes of Utah State University. The methodology and equations that were developed to predict flow resistance for fultiple plant types include the effects of plant fexibility, varying plant density, plant characteristics, and multiple plant stems. The study included over 214 flow tests, testing of 20 different plant types, 5 …


Utah Water Research Laboratory Publications Listing 1993-1996, David S. Bowles, Leaunda S. Hemphill Jan 1996

Utah Water Research Laboratory Publications Listing 1993-1996, David S. Bowles, Leaunda S. Hemphill

Reports

No abstract provided.


Cache County Water Demand/Supply Model, Trevor C. Hughes, Gregory J. Norby, Laxman Thyagarajan Jan 1996

Cache County Water Demand/Supply Model, Trevor C. Hughes, Gregory J. Norby, Laxman Thyagarajan

Reports

This report descibes a municipal water demand forecasting model for use in areas of mixed rural and urban housing types. A series of residential demand functions were derived which forecast water demand based on the ype and density of housing and season. Micro sampling techniques were used to correlate water use data and explanatory variable data for low, medium, and high density housing. The demand functions were incorporated into a geographic information system (GIS) platform cosisting of a desk-top mapping program, MapInfo, coupled with a user interface program written in Visual Basic. The GIS-based model analyzes water demand at the …