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Tracing the Mixing of Groundwater into Coastal Water Utilizing a New Radiometric Technique: Radium Isotope Systematics to Look at the Geologic Control of Aquifers

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Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: Peter Swarzenski
Publication_Date: 2000
Title:
Tracing the Mixing of Groundwater into Coastal Water Utilizing a New Radiometric Technique: Radium Isotope Systematics to Look at the Geologic Control of Aquifers
Geospatial_Data_Presentation_Form: maps and data
Online_Linkage:
https://sofia.usgs.gov/projects/index.php?project_url=grndwtr_mixing
Description:
Abstract:
We propose to develop 223,224,228,226Ra isotope systematics to address the issue of groundwater flow into Florida Bay. Such methods are critical in accurately evaluating the role of submarine discharge and have direct implications for assessing coastal eutrophication, contamination and overall ecosystem change. Techniques described herein have been successfully utilized to quantify the contribution of groundwater in coastal mixing on time scales of a few days to years. Briefly, radium has a very different geochemical signature in freshwater versus seawater. This attribute, in addition to known source functions, a wide range of half-lives (3.8 days to 1600 years), and elevated groundwater activities make radium ideal to examine subsurface water/sediment transitions. By measuring this suite of radium isotopes in local groundwater wells (which are already in place) as well as in surrounding fresh water, seawater and underlying limestone, we will determine the coastal groundwater discharge rate and magnitude. The application of radium isotopes in this system will provide vital informationfor establishing a comprehensive water and contaminant budget for Florida Bay.
Purpose:
It is well known that marine groundwater discharge into certain coastal waters can be very large and is susceptible to heightened freshwater demand. A major potential impact from this study would be to accurately quantify the rate and magnitude of groundwater discharge in south Florida. Such data are conspicuously lacking at present, and would provide a crucial key to developing water budgets and associated nutrient mass balance calculations. This has a direct application to ongoing studies that look, for example, at the flux of sub-surface nutrients that enter Florida Bay. Major products from the proposed study would be: 1) To develop the capabilities to measure natural activities of short and long lived Ra isotopes in St. Petersburg; 2) To use these isotopes as a means for quantifying groundwater discharge in south Florida. This will provide crucial information for many ongoing projects in Florida Bay (e.g., groundwater discharge - change in nutrient/metal/salinity budgets - change in community structure); 3) To examine groundwater discharge data in context of the regional geology. This will provide a predictive capability that will eventually be applicable to other coastal aquifer systems. This is a theme that is receiving much current attention all along the eastern seaboard; e.g., Chesapeake Bay-DelMarVa Peninsula (F. Manheim); and 4) Data reduction and dissemination through presentations at science meetings and peer-reviewed journal articles.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 19981001
Ending_Date: 20000931
Currentness_Reference: ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Description_of_Geographic_Extent: Florida Bay, Gulf of Mexico
Bounding_Coordinates:
West_Bounding_Coordinate: -81.11
East_Bounding_Coordinate: -80.4
North_Bounding_Coordinate: 25.25
South_Bounding_Coordinate: 24.85
Keywords:
Theme:
Theme_Keyword_Thesaurus: none
Theme_Keyword: radium
Theme_Keyword: radium isotopes
Theme_Keyword: groundwater
Theme_Keyword: aquifer
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: environment
Place:
Place_Keyword_Thesaurus: none
Place_Keyword: Florida Bay
Place_Keyword: Florida
Access_Constraints: None
Use_Constraints:
Cite primary authors and database when using or publishing these data
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Peter W. Swarzenski
Contact_Organization: U.S. Geological Survey
Contact_Address:
Address_Type: mailing and physical
Address: 400 Natural Bridges Drive
City: Santa Cruz
State_or_Province: CA
Postal_Code: 95060
Country: USA
Contact_Voice_Telephone: 831-427-4729
Contact_Electronic_Mail_Address: pswarzen@usgs.gov
Cross_Reference:
Citation_Information:
Originator: Peter W. Swarzenski
Publication_Date: 1999
Title:
Examining freshwater-saltwater interface processes with four radium isotopes
Geospatial_Data_Presentation_Form: publication
Series_Information:
Series_Name: USGS Fact Sheet
Issue_Identification: 065-99
Online_Linkage: https://sofia.usgs.gov/publications/fs/65-99/
Cross_Reference:
Citation_Information:
Originator: Peter W. Swarzenski, Jonathan B. Martin, and Jaye C. Cable
Publication_Date: 2001
Title:
Submarine Ground-Water Discharge in Upper Indian River Lagoon, Florida
Geospatial_Data_Presentation_Form: publication
Other_Citation_Details: p. 194-197
Online_Linkage: http://water.usgs.gov/ogw/karst/kigconference/pws_submarine.htm
Larger_Work_Citation:
Citation_Information:
Originator: Eve L. Kumiansky, editor
Publication_Date: 2001
Title: U.S Geological Survey Karst Interest Group Proceedings
Geospatial_Data_Presentation_Form: publication
Series_Information:
Series_Name: Water-Resources Investigations Report
Issue_Identification: 01-4011

Data_Quality_Information:
Logical_Consistency_Report: Unknown
Completeness_Report: Unknown
Lineage:
Process_Step:
Process_Description:
Develop the radiochemical capabilities in St Petersburg to utilize the Ra quartet in ground water studies.
Strategy: We will work closely with Dr W.S. Moore USC) to setup, calibrate and utilize coincidence counters. Bringing this capacity to St. Petersburg would significantly our existing radiochemical expertise and expand our versatility to include short duration (days to weeks) coastal processes. The capability would have relevance in all coastal waters where the hydrologic regime is conducive to subterranean marine groundwater discharge. The best method for quantifying short-lived 223,224Ra is a delayed coincidence counting system, as developed specifically by Moore. Swarzenski has worked closely with Moore and will develop this capability at USGS CFCG under his guidance. Such a counting system is relatively inexpensive (under 10K for two), portable (can be brought in the field) and can quantify additional short-lived isotopes such as 227Ac, whose environmental fate is still largely untested but promising for ephemeral sediment/water interface processes (e.g., resuspension).
Process_Date: Unknown
Process_Step:
Process_Description:
Characterize the temporal and spatial groundwater discharge in the vicinity of the freshwater/saltwater interface of south Florida.
Strategy: We have just now (mid-May, 1998) secured supplemental support (at present still verbal; contact is Dr. Chris Madden, SFWMD) from the South Florida Water Management District to precisely address issues of groundwater flow into Florida Bay. Thus this proposed research plan would foster a collaborative program between the USGS and a water management district. Our sampling efforts would directly overlap with ongoing SFWMD field efforts. We will quantify the Ra quartet in groundwater wells, freshwater, seawater, Holocene and Pleistocene limestone deposits.
Process_Date: Unknown
Process_Step:
Process_Description:
Assess observed groundwater flow characteristics in south Florida within a regional geologic framework.
Strategy: Take advantage of extensive knowledge on the hydrology of south Florida to develop a correlative relationship between the regional geology and groundwater discharge characteristics. Establishing such a relationship will broaden the predictive applicability of these Ra isotopes to other coastal aquifer systems.
Process_Date: Unknown

Distribution_Information:
Distributor:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Heather S. Henkel
Contact_Organization: U.S. Geological Survey
Contact_Address:
Address_Type: mailing and physical
Address: 600 4th Street South
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: USA
Contact_Voice_Telephone: 727-502-8028
Contact_Facsimile_Telephone: 727-502-8182
Contact_Electronic_Mail_Address: hhenkel@usgs.gov
Distribution_Liability: The data have no explicit or implied guarantees.

Metadata_Reference_Information:
Metadata_Date: 20140922
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Heather S. Henkel
Contact_Organization: U.S. Geological Survey
Contact_Address:
Address_Type: mailing and physical
Address: 600 4th Street South
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: USA
Contact_Voice_Telephone: 727-502-8028
Contact_Facsimile_Telephone: 727-502-8182
Contact_Electronic_Mail_Address: sofia-metadata@usgs.gov
Metadata_Standard_Name:
FGDC Biological Data Profile of the Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001.1-1999
Metadata_Access_Constraints:
The SOFIA staff were unable to contact the principal investigator(s) for this project, and therefore were unable to obtain a review of the information in the metadata record. Any questions about the information should be directed to the Primary Contact Person listed near the bottom of the metadata record.
This metadata record may have been copied from the SOFIA website and may not be the most recent version. Please check https://sofia.usgs.gov/metadata to be sure you have the most recent version.

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Last updated: 23 December, 2016 @ 01:49 PM (KP)