Florida Bay Bottom Salinity MapsEntry ID: USGS_SOFIA_Fbbslmap
Abstract: The maps show the bottom salinity for Florida Bay at 5ppt salinity intervals approximately every other month beginning in November 1994 through December 1996.
Recent algal blooms and seagrass mortality have raised concerns about the water quality of Florida Bay, particularly its nutrient content (nitrogen and phosphorous), hypersalinity, and turbidity. Water quality is closely tied to ... sediment transport processes because resuspension of sediments increases turbidity, releases stored nutrients, and facilitates sediment export to the reef tract. The objective of this research is to provide a better understanding of how and when sediments within Florida Bay are resuspended and deposited, to define the spatial distribution of the potential for resuspension, to delineate patterns of potential bathymetric change, and to predict the impacts of storms or seagrass die-off on bathymetry and circulation within the bay. By combining these results with the findings of other research being conducted in Florida Bay, we hope to quantify sediment export from the bay, better define the nutrient input during resuspension events, and assist in modeling circulation and water quality. Results will enable long-term sediment deposition and erosion in various regions of the bay to be integrated with data on the anticipated sea-level rise to predict future water depths and volumes. Results from this project, together with established sediment production rates, will provide the basis for a sediment budget for Florida Bay.
Data Set Citation
Dataset Originator/Creator: Robert Halley, Dewitt Smith, Mark Hansen
Dataset Title: Florida Bay Bottom Salinity maps
Dataset Series Name: USGS Open-File Report
Dataset Release Date: 1997
Dataset Release Place: Reston VA
Dataset Publisher: U.S. Geological Survey
Issue Identification: OFR 95-634, maps 1B-13B
Data Presentation Form: mapOnline Resource: http://sofia.usgs.gov/projects/circulation/data/sal_maps/index.html
Start Date: 1994-11-01Stop Date: 1996-12-31
Latitude Resolution: 0.0001
Longitude Resolution: 0.0001
Quality The salinity maps are based on data gathered by USGS with additional data provided by Everglades National Park (ENP) and the South Florida Water Management District (SFWMD).
COMPLETENESS REPORT: Bottom salinity maps are available for November, 1994; January, April, June, August, October, and December, 1995; and February, April, June, August, October, and December, 1996
... HORIZONTAL POSITIONAL ACCURACY REPORT: Local information was recorded in the Bay using a DIO-issued military style GPSunit - Rockwell Precision Lightweight GPS Receiver PLGR+96 with a precision of +/- 10m.
The USGS conducted salinity surveys of Florida Bay approximately every other month from November 1994 through November 2001. The data collected during the surveys were supplemented with point data from Everglades National Park marine monitoring continuous stations and the South Florida Water Management District water quality monitoring stations collected by the Southeast Environmental Research Program at Florida International University from 1994 through 1997. The data were assembled and contoured using CPS3 (Contour Plotting System) software version 4.2 and ARC/INFO 7.0.3 to produce maps of the bottom salinity in Florida Bay. Data points are shown on the maps. Surveys typically took between 3 and 5 days, depending on weather. Between 1994 and the summer of 1996 each survey collected salinity data at between 250 and 350 stations each consisting of a surface measurement 15 cm below the surface and a measurement on the bottom.
During the summer and fall of 1996, the USGS developed a digital measuring system so that subsequent surveys collected several thousand surface measurements. Due to the new digital system, the USGS no longer uses the South Florida Water Management District data nor the Everglades National Park data. Bottom salinity surveys were discontinued after December 1996.
Mention of specific software or hardware products does not constitute an endorsement by the U.S. Geological Survey.
Access Constraints None
Use Constraints None
Data Set Progress
Distribution Format: Maps in PDF, Raw data in ASCII text
Role: TECHNICAL CONTACT
Phone: 727-803-8747 ext. 3020
Email: rhalley at usgs.gov
U.S. Geological Survey 600 Fourth Street South
City: St. Petersburg
Province or State: FL
Postal Code: 33701
Role: DIF AUTHOR
Email: alicia.m.aleman at nasa.gov
Goddard Space Flight Center Code 610.2
Province or State: MD
Postal Code: 20771
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Creation and Review Dates
DIF Creation Date: 2006-10-04
Last DIF Revision Date: 2008-12-31