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Remote Sensing of Water Turbidity and Sedimentation and Their Relationship to Algal Blooms

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator:
Richard P. Stumpf

Megan L. Frayer

Publication_Date: Unpublished material
Title:
Remote Sensing of Water Turbidity and Sedimentation and Their Relationship to Algal Blooms
Online_Linkage: <http://sofia.usgs.gov/projects/sed_turbidity/>
Description:
Abstract:
A decline in water clarity in Florida Bay has been observed following the seagrass dieoffs starting in the late 1980's. Algal blooms and discolored water have been reported in Florida Bay over the last several years and factors such as resuspension of material and nutrients from the bottom have been suggested as a cause. Monthly monitoring programs by Florida International University (FIU) and Florida Department of Environmental Protection (FDEP) have provided documentation of blooms through chlorophyll measurements. This study is using remote sensing to examine resuspension events, the distribution of turbid water and changes in the patterns of water clarity in the Bay.
Purpose:
The project is conducting comparisons between chlorophyll values collected from the shipboard monitoring programs and pre-cruise reflectances to assess whether there is a link between resuspension events and algal blooms. The next stage in the project is to expand the AVHRR data set backward to before the seagrass dieoffs and to incorporate Landsat data for limited high resolution analysis.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 19891201
Ending_Date: 1999
Currentness_Reference: Publication date
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -81.25
East_Bounding_Coordinate: -80.3
North_Bounding_Coordinate: 25.8
South_Bounding_Coordinate: 24.75
Keywords:
Theme:
Theme_Keyword_Thesaurus: none
Theme_Keyword: biology
Theme_Keyword: hydrogeology
Theme_Keyword: mapping
Theme_Keyword: algal blooms
Theme_Keyword: chlorophyll
Theme_Keyword: reflectance
Theme_Keyword: remote sensing
Theme_Keyword: seagrass
Theme_Keyword: secchi depths
Theme_Keyword: turbidity
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: biota
Theme_Keyword: environment
Theme_Keyword: imageryBaseMapsEarthCover
Theme_Keyword: inlandWaters
Theme_Keyword: 002
Theme_Keyword: 007
Theme_Keyword: 010
Theme_Keyword: 012
Theme_Keyword: geoscientificInformation
Theme_Keyword: 008
Place:
Place_Keyword_Thesaurus:
Department of Commerce, 1995, Countries, Dependencies, Areas of Special Sovereignty, and Their Principal Administrative Divisions, Federal Information Processing Standard (FIPS) 10-4, Washington, D.C., National Institute of Standards and Technology
Place_Keyword: United States
Place_Keyword: US
Place:
Place_Keyword_Thesaurus:
U.S. Department of Commerce, 1987, Codes for the identification of the States, the District of Columbia and the outlying areas of the United States, and associated areas (Federal Information Processing Standard 5-2): Washington, D. C., NIST
Place_Keyword: Florida
Place_Keyword: FL
Place:
Place_Keyword_Thesaurus:
Department of Commerce, 1990, Counties and Equivalent Entities of the United States, Its Possessions, and Associated Areas, FIPS 6-3, Washington, DC, National Institute of Standards and Technology
Place_Keyword: Monroe County
Place_Keyword: Miami-Dade County
Place:
Place_Keyword_Thesaurus: USGS Geographic Names Information System
Place_Keyword: Johnson Key
Place_Keyword: Sprigger Bank
Place_Keyword: Twin Key
Place_Keyword: Florida Bay
Place_Keyword: Biscayne Bay
Place:
Place_Keyword_Thesaurus: none
Place_Keyword: Central Everglades
Place_Keyword: South East Coast
Place_Keyword: Rankin Lake
Access_Constraints: none
Use_Constraints: none
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Rob Wertz
Contact_Organization: U.S. Geological Survey
Contact_Position: Manager - Data Management Group
Contact_Address:
Address_Type: Mailing address
Address: 600 Fourth Street South
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: USA
Contact_Voice_Telephone: 727 803-8747 ext. 3045
Contact_Facsimile_Telephone: 727 803-2030
Contact_Electronic_Mail_Address: rwertz@usgs.gov
Cross_Reference:
Citation_Information:
Originator:
Ransibrahmanakul, Varis

Stumpf, Richard P.

Publication_Date: 2002
Title:
The Use of AVHRR Satellite Data for Estimating Spatially Varying Critical Wind Stress in Florida Bay
Geospatial_Data_Presentation_Form: report
Series_Information:
Series_Name: Journal of Coastal Research
Issue_Identification: v. 18, no. 2
Publication_Information:
Publication_Place: Royal Palm Beach, FL
Publisher: Coastal Education and Research Foundation (CERF)
Data_Quality_Information:
Logical_Consistency_Report: not applicable
Completeness_Report: unavailable
Lineage:
Process_Step:
Process_Description:
The Advanced Very High Resolution Radiometer (AVHRR) on NOAA 600 usable scenes are available from some 1500 covering a period from December 1989 to the present. AVHRR has a pixel size of about 1.1 km. The data sets are processed for water reflectance, which is related to water turbidity variables such as attenuation, Secchi depths, total particulate matter, and nephelometric turbidity. Tentative relationships with these variables have been made. (Sea surface temperature is also determined.) High reflectance corresponds to high attenuation or particulate loads or shallow Secchi depth. The individual scenes are also processed to obtain monthly and seasonal means, with winter corresponding to the period of December to March and summer to June through September. Initial analyses include the points corresponding to fixed stations occupied at a monthly interval by FIU or FDEP. In examining the average reflectance of the entire Bay, the satellite imagery does not show a trend between December 1989 and September 1996. The seasonal pattern of high turbidity in winter and low in summer is evident. Trends over the time period appear in subsections of the Bay. A substantial increase in water reflectance is evident in the north-central Bay (which has been documented in field studies, this region includes Rankin Lake and Johnson Key. However these appear to have different phasing, with Johnson Key showing an increase in turbidity about two years earlier than Rankin Lake. Both sites show the decline in both winter and summer. Twin Key, which has the clearest water in the Bay, has shown a slight increase. The southwest portion of the Bay, west of Sprigger Bank, has shown a decrease in reflectance, indicating clearer water.
Process_Date: 2000
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Rob Wertz
Contact_Organization: U.S. Geological Survey
Contact_Position: Manager - Data Management Group
Contact_Address:
Address_Type: Mailing address
Address: 600 Fourth Street South
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: USA
Contact_Voice_Telephone: 727 803-8747 ext. 3045
Contact_Facsimile_Telephone: 727 803-2030
Contact_Electronic_Mail_Address: rwertz@usgs.gov
Distribution_Information:
Distributor:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Rob Wertz
Contact_Organization: U.S. Geological Survey
Contact_Position: Manager - Data Management Group
Contact_Address:
Address_Type: Mailing address
Address: 600 Fourth Street South
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: USA
Contact_Voice_Telephone: 727 803-8747 ext. 3045
Contact_Facsimile_Telephone: 727 803-2030
Contact_Electronic_Mail_Address: rwertz@usgs.gov
Resource_Description: Florida Bay satellite images
Distribution_Liability: The data have no implied or explicit guarantees.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: GIF
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: <http://coastal.er.usgs.gov/flbay/>
Access_Instructions:
Images may be downloaded through SOFIA from the USGS Coastal & Marine Geology Program website
Fees: none
Metadata_Reference_Information:
Metadata_Date: 20061004
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Heather Henkel
Contact_Organization: U.S. Geological Survey
Contact_Address:
Address_Type: mailing and physical address
Address: 600 Fourth Street South
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: USA
Contact_Voice_Telephone: 727 803-8747 ext 3028
Contact_Facsimile_Telephone: 727 803-2030
Contact_Electronic_Mail_Address: sofia-metadata@usgs.gov
Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
This page is <http://sofia.usgs.gov/metadata/sflwww/FBturbidity.html>

U.S. Department of the Interior, U.S. Geological Survey, Center for Coastal Geology
Comments and suggestions? Contact: Heather Henkel - Webmaster
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