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Velocity Data (Canal and Wetland)

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Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: Raymond W. Schaffranek (retired)
Publication_Date: 2005
Title: Velocity Data (Canal and Wetland)
Geospatial_Data_Presentation_Form: maps and data
Online_Linkage: <http://sofia.usgs.gov/exchange/schaffranek/schafflow.html>
Description:
Abstract:
Velocity data were collected on five dates (two in 1997 and three in 1999) at numerous locations along the C-111 Canal in the Everglades.
Purpose:
A complex network of canals, levees, and control structures, designed to control flooding and provide a continuous supply of fresh water for household and agricultural use, has altered naturally occurring flow patterns through the Everglades and into Florida Bay. Quantification of dynamic flow conditions within the south Florida ecosystem is vital to assessing implications of the residence time of water, potentially nutrient-enriched (with nitrates or phosphates) or contaminant-laden (with metals or pesticides), that can alter plant life and affect biological communities. Improved numerical techniques are needed not only to more accurately evaluate discrete forces governing flow in the canals and wetlands but also to analyze their complex interaction in order to facilitate coupled representation of transport processes. Flow and transport processes are integrally linked meaning that precise quantification of the fluid dynamics is required to accurately evaluate the transport of waterborne constituents. Robust models that employ highly accurate numerical methods to invoke coupled solution of the most appropriately formulated and representative equations governing flow and transport processes are needed. Through strategic use of a model, cause-and-effect relations between discharge sources, flow magnitudes, transport processes, and changes in vegetation and biota can be systematically investigated. The effects of driving forces on nutrient cycling and contaminant transport can then be quantified, evaluated, and more effectively factored into the development of remedial management plans. A well-developed model can be used to evaluate newly devised plans to improve freshwater deliveries to Florida Bay prior to implementation.
Supplemental_Information:
This project ended in 1999.

For additional information about this project contact either: Eric Swain, edswain@usgs.gov or Chris Langevin, langevin@usgs.gov

Time_Period_of_Content:
Time_Period_Information:
Multiple_Dates/Times:
Single_Date/Time:
Calendar_Date: 19970923
Single_Date/Time:
Calendar_Date: 19970926
Single_Date/Time:
Calendar_Date: 19990920
Single_Date/Time:
Calendar_Date: 19990922
Single_Date/Time:
Calendar_Date: 19990923
Currentness_Reference: ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -80.6
East_Bounding_Coordinate: -80.4
North_Bounding_Coordinate: 25.35
South_Bounding_Coordinate: 25.25
Keywords:
Theme:
Theme_Keyword_Thesaurus: none
Theme_Keyword: flow
Theme_Keyword: model
Theme_Keyword: flow models
Theme_Keyword: freshwater flow
Theme_Keyword: tidal effects
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: environment
Theme_Keyword: inlandWaters
Theme_Keyword: 007
Theme_Keyword: 012
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, DC, 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, DC, 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: Miami-Dade County
Place:
Place_Keyword_Thesaurus: USGS Geographic Names Information System
Place_Keyword: Florida Bay
Place_Keyword: Joe Bay
Place_Keyword: Long Sound
Place_Keyword: Everglades National Park
Place:
Place_Keyword_Thesaurus: none
Place_Keyword: Central Everglades
Place_Keyword: C-111 Canal
Access_Constraints: none
Use_Constraints: none
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Eric D. Swain
Contact_Organization: U.S. Geological Survey
Contact_Address:
Address_Type: mailing and physical
Address: 3110 SW 9th Avenue
City: Ft. Lauderdale
State_or_Province: FL
Postal_Code: 33315
Country: USA
Contact_Voice_Telephone: 954 377-5925
Contact_Facsimile_Telephone: 954 377-5901
Contact_Electronic_Mail_Address: edswain@usgs.gov
Browse_Graphic:
Browse_Graphic_File_Name:
<http://sofia.usgs.gov/geer/2000/posters/c111/images/locationmapx.jpg>
Browse_Graphic_File_Description: location of study area
Browse_Graphic_File_Type: JPEG
Browse_Graphic:
Browse_Graphic_File_Name: <http://sofia.usgs.gov/exchange/schaffranek/locationflow.html>
Browse_Graphic_File_Description: velocity data location maps
Browse_Graphic_File_Type: JPEG
Data_Set_Credit:
Data were collected by Marvin Franklin, Gina Tillis, Paul Meadows, Darlene Blum, Harry Jenter, and Ray Schaffranek.
Native_Data_Set_Environment: MS Excel
Cross_Reference:
Citation_Information:
Originator:
Ball, M. H.

Schaffranek, R. W.

Publication_Date: 2000
Title:
Flow-Velocity Data Collected in the Wetlands Adjacent to Canal C-111 in South Florida during 1997 and 1999
Geospatial_Data_Presentation_Form: publication
Series_Information:
Series_Name: USGS Open-File Report
Issue_Identification: 2000-56
Publication_Information:
Publication_Place: Reston, VA
Publisher: U.S. Geological Survey
Other_Citation_Details:
accessed as of 6/7/2011

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Online_Linkage: <http://sofia.usgs.gov/publications/ofr/00-56>
Cross_Reference:
Citation_Information:
Originator: Schaffranek, R, W.
Publication_Date: 1999
Title:
Hydrologic Studies in Support of South Florida Ecosystem Restoration
Geospatial_Data_Presentation_Form: publication
Series_Information:
Series_Name:
Proceedings ASCE 2000 Joint Conference on Water Resources Engineering and Water Resources Planning and Management
Issue_Identification: none
Publication_Information:
Publication_Place: Reston, VA
Publisher: American Society of Civil Engineers
Other_Citation_Details: accessed as of 6/7/2011
Online_Linkage: <http://sofia.usgs.gov/publications/papers/hydrostudies/>
Cross_Reference:
Citation_Information:
Originator: Sontek
Publication_Date: 1997
Title: Sontek ADV acoustic Doppler velocimeter technical documentation
Geospatial_Data_Presentation_Form: publication
Publication_Information:
Publication_Place: San Diego, CA
Publisher: Sontek

Data_Quality_Information:
Logical_Consistency_Report:
Locations for sites sampled in 1997 are shown in latitude and longitude. Locations for the 1999 sites are in UTM coordinates. Flow parameteres recorded include depth, velocity, and flow direction.
Completeness_Report:
Sept. 23, 1997

Data are available for the following locations: 1_5, 1_6, 1_7, 1_8, 2_3, 3_3, 3_4, 3_7, 3_9, 4_3, 4_4, 4_5, 5_3, 5_5, 6_6, 7_2, 7_3, 7_4, 7_5, 7_6, 8_4, 8_5, 8_6 on the location map. Data are also available for locations 4_6, 9_1, and 9_3 which are not shown on the location map.

Sept. 26, 1997

Data are available for for the following locations: 6A_3, 6A_4, 6A_5, 6A_6, 6A_7, 6A_8, 6A_9, 6A_X, 6b-3, 6B_4, 6B_6, 6B_7, 6B_8, 6C_4, 6C_5, 6C_6, and MAFQWMON. Data are available for the 6C_3 location which is not shown on the map.

Sept. 20, 1999

Data are avaiilable for the following locations: c1_2, c1_3, c1_4, c2_4, c2_5, c3_3 (mb3_3), c3_4 (mb3_4), c4_1 (mb4_1), and c4_2 (mb4_2)

Sept. 22, 1999

Data are available for the following locations: ns_2, ns_20, ew_23, ew_24, ew_26, ew_27, ew_28, ew_29, ew_30, ew_31, ew_33, ew_34, ew_35, c3_1, c3_2, c4_1, c4_2, c4_5, c6_2 (mrt6p2), c6_4 (mrt6p4), c6_5 (mrt6p5), c12_4, and c12_5

Sept. 23, 1999

Data only available for the e7 location

Lineage:
Process_Step:
Process_Description:
Velocity Data Collection

Flow velocities in the C-111 wetlands were measured using portable Acoustic Doppler Velocity (ADV) meters that determine velocity components in the East, North, and Up directions (ENU). The ADV meter consists of a measuring probe attached to a signal-conditioning module, which is cabled to a processing unit equipped with a serial interface to a portable computer. The meter measures the frequency shift between a short acoustic pulse of known frequency and its reflectance from particles moving with the flow of water. The scattering strength of the acoustic signal is a function of particle size and concentration within the sampling volume. The particular ADV meter used (Sontek, 1997) operates internally at an acoustic frequency of 10 MHz with a programmable sampling rate ranging from 0.1 to 25 Hz, producing multiple individual velocity readings, referred to as velocity pings. The ADV meter measures the flow in a remote sampling volume, approximately 0.25 cm3, to a resolution of 0.1 mm/s. Water temperature and salinity, measured independently, are input to the ADV meter processor to compute the speed of sound, which is used to convert Doppler frequency shift to flow velocity. With an optional magnetic compass and tilt sensor, the instrument processor internally converts velocity measurements to an East, North, and Up coordinate system. Data conversion programs supplied by the instrument manufacturer (Sontek, 1997) produce four output text files from the binary data file recorded by the processing unit of the ADV meter: control, velocity, correlation, and signal to noise ratio (SNR) files. The control file contains the water-quality parameters and instrument-specific information used to calculate velocity components as well as site-specific data for identification purposes (fig. 2). The velocity file contains the velocity component values for each ping. A correlation value for each ping, which is a general data quality parameter expressed as a percent that can identify poor data resulting from a variety of factors, such as an instrument malfunction or a fouled probe, is output to the correlation file. The SNR file contains a value for each ping that identifies the signal strength during the measurement, calculated as signal amplitude subtracted from signal noise level and expressed in decibel (dB) units (Sontek, 1997).

In 1997, flow measurements generally were made at five locations spaced at variable intervals along nine transects oriented southwestward and perpendicular to the canal. In 1999, measurements were repeated at five of these transects and collected along one new transect, perpendicular to the canal at the S18-C control structure. Flow measurements also were made on two new transects along the ENP boundary to the south and west of C-111, one oriented north-south and the other east-west. In 1997, data were collected and recorded in the U.S. Customary System units whereas in 1999 International System (SI) units were used. For reader convenience and use, summary statistics for data collected in 1997 have been converted to SI units in this report. At all measurement sites, velocities generally were sampled at 10 Hz in two-minute bursts consisting of 1200 individual velocity pings. In September 1997, velocities were measured at 0.8d, 0.6d, and 0.2d, where d is total depth from the water surface to the top of the litter layer. In September 1999, velocities were measured at 0.8d, 0.5d, and 0.2d. At sites where the water depth was less than 15 cm, only a mid-depth velocity measurement was made. In 1997, temperature, salinity, dissolved oxygen, conductivity, and pH were measured, always at mid-depth. In 1999, only temperature, salinity, and conductivity were measured. In both years, visual observations of vegetation characteristics (type, density, and height) were noted and recorded at each site. These flow-velocity data were collected to analyze regional surface-water flow patterns in the C-111 wetlands and to compute discharge fluxes across basin boundaries. The data were processed, as described in this report, specifically for these purposes and are not intended, nor are they necessarily suitable, for use in other applications.

After the preliminary data reduction, two techniques were used to process the data. The first data-processing technique was the application of an automated filtering program to identify velocity pings of poor signal quality and the second technique was the visual inspection of plotted data and the analysis of velocity standard deviation. The filtering criteria used in the automated program are those suggested by the ADV meter manufacturer to identify suspect data due to poor signal quality (Sontek, 1997). The analysis of velocity standard deviation and visual inspection of plotted data were used as a secondary processing technique to identify additional suspect data presumably caused by perturbations in the water column rather than poor signal quality. The first data-processing technique, the automated filtering program, is designed to remove velocity pings with a correlation value less than 70% or SNR value less than 5 dB. (A correlation value above 70% and an SNR greater than 15 dB at 25 Hz and greater than 5 dB at 0.1 Hz are suggested indicators of good acoustic signal quality (Sontek, 1997).) The automated filtering program consists of two functions. The first function calculates component-averages of correlation and SNR values for each ping, whereas the second function uses single-component values for each ping. The first function identifies component-averaged correlation or SNR values that do not meet the above criteria, removes the three velocity components of that ping from the data set, and recalculates the component-velocity average and standard deviation. The second function of the filtering program identifies any single-component correlation or SNR value that does not meet the criteria, removes the identified velocity component of that ping from the data set, and recalculates the component-velocity average and standard deviation (see example in table 2). For the C-111 data processed herein, only results of the single-component filter are tabulated for comparison to values calculated from the raw data. (See Appendix A for data collected in 1997 and Appendix B for data collected in 1999). The second data-processing technique, designed for the C-111 data, combines the visual inspection of plots of component velocities and their 21-point running averages plotted at each depth with the analysis of velocity standard deviation. Inspection of the plots and velocity standard deviation can reveal the presence of large scatter or trends in the data generally not detected by the automated filtering process.

For both years, slightly more than half of the data sets included pings that did not pass the criteria of the single-component filter in the automated program. However, in many of those data sets only a few pings failed and the majority of the data sets evidenced little change in recalculated velocity magnitude and flow direction.

For flow-velocity analysis of the C-111 canal and adjacent wetlands, resultant velocity magnitude in the horizontal plane and vector-averaged flow direction, relative to magnetic north, were calculated for each site.

Process_Date: 1999
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Eric D. Swain
Contact_Organization: U.S. Geological Survey
Contact_Address:
Address_Type: mailing and physical
Address: 3110 SW 9th Avenue
City: Ft. Lauderdale
State_or_Province: FL
Postal_Code: 33315
Country: USA
Contact_Voice_Telephone: 954 377-5925
Contact_Facsimile_Telephone: 954 377-5901
Contact_Electronic_Mail_Address: edswain@usgs.gov

Spatial_Data_Organization_Information:
Indirect_Spatial_Reference: Everglades National Park

Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name: Universal Transverse Mercator
Universal_Transverse_Mercator:
UTM_Zone_Number: 17
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.9996
Longitude_of_Central_Meridian: -81
Latitude_of_Projection_Origin: 0
False_Easting: 500000
False_Northing: 0
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: Coordinate Pair
Coordinate_Representation:
Abscissa_Resolution: 1
Ordinate_Resolution: 1
Planar_Distance_Units: meters
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1983
Ellipsoid_Name: Geodetic Reference System 80
Semi-major_Axis: 6378137
Denominator_of_Flattening_Ratio: 298.257

Entity_and_Attribute_Information:
Overview_Description:
Entity_and_Attribute_Overview:
Parameters recorded include Site ID, Date, Location in UTM Easting and Northing, and Flow Parameters of Depth (m), Velocity (cm/s) and Flow Direction (from magnetic north)
Entity_and_Attribute_Detail_Citation: USGS personnel

Distribution_Information:
Distributor:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Heather S. Henkel
Contact_Organization: U.S. Geological Survey
Contact_Address:
Address_Type: mailing address
Address: 600 Fourth St. 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: hhenkel@usgs.gov
Resource_Description: velocity data
Distribution_Liability: The data have no explicit or implied guarantees.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: MS Excel
Format_Version_Number: unknown
Format_Information_Content:
Files are available for individual collection dates as well as velocity data site summaries, velocity data quality, and raw and filtered data comparisons
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: <http://sofia.usgs.gov/exchange/schaffranek/schafflow.html>
Access_Instructions: Data may be downloaded from the SOFIA website
Fees: none

Metadata_Reference_Information:
Metadata_Date: 20110607
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
Metadata_Access_Constraints: none
Metadata_Use_Constraints:
This metadata record may have been copied from the SOFIA website and may not be the most recent version. Please check <http://sofia.usgs.gov/metadata> to be sure you have the most recent version.

This page is <http://sofia.usgs.gov/metadata/sflwww/vel_data_canal-wet.html>

U.S. Department of the Interior, U.S. Geological Survey
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