Eric Swain 1998 report http://sofia.usgs.gov/projects/hydraulic/ Discharges through 10 selected coastal control structures in Broward and Palm Beach Counties and the 16 coastal structures in Miami-Dade County, Fla., Florida, are presently computed using the theoretical discharge-coefficient ratings developed from scale modeling, theoretical discharge coefficients, and some field calibrations whose accuracies for specific sites are unknown. To achieve more accurate discharge-coefficient ratings for the coastal control structures, field discharge measurements were taken with an Acoustic Doppler Current Profiler at each coastal control structure under a variety of flow conditions. These measurements were used to determine computed discharge-coefficient ratings for the coastal control structures under different flow regimes: submerged orifice flow, submerged weir flow, free orifice flow, and free weir flow. Theoretical and computed discharge-coefficient ratings for submerged orifice and weir flows were determined at the coastal control structures, and discharge ratings for free orifice and weir flows were determined at three coastal control structures. The difference between the theoretical and computed discharge-coefficient ratings varied from structure to structure. A system of canals and levees has been constructed over the last century for the purpose of drainage, flood control, and aquifer discharge. Strategically placed control structures allow the water management officials to move water from inland areas during high-rainfall periods and retain water in dry periods. Freshwater discharged to tide through coastal structures not only affects the amount of water available for water supply in the lower east coast and the Everglades, but it also affects the biota in the Intracoastal Waterway and Biscayne Bay. Therefore, it is imperative that there be accurate ratings for these structures to predict the effects of various water restoration alternatives. Although these coastal structures are a pivotal part of the man-made system, the discharge through most of them is computed only from theoretical ratings. Actual field measurements are needed in order to determine if the theoretical ratings are adequate, and to develop more accurate ratings. Stage measurements are made by the South Florida Water Management District (SFWMD) or the USGS at the east coast structures. The flows through the coastal structures in Miami-Dade, Broward, and Palm Beach counties can be computed by developing stage-discharge ratings from field measurements of flow, stage, and structure operations. Although theoretical ratings exist for the structures, no check as to the accuracy of these ratings has been made. In order to develop ratings from field measurements, discharge measurements must be made at the structure simultaneously with water level and structure operation measurements. Difficulties in making accurate discharge measurements arise from the slow flows and non-standard velocity profiles in south Florida canals. The Acoustic Doppler Current Profiler (ADCP), which uses the Doppler shift in acoustic signals to determine water velocity and compute discharge, is ideal for measurements in slow and spatially varying velocity fields. Statistical techniques were used to determine the best-fit ratings for the structures and error analysis of the ratings. The objective of this study was to determine discharge ratings for 10 coastal hydraulic control structures (7 in eastern Broward and 3 in southeastern Palm Beach counties as well as for 16 coastal hydraulic control structures in eastern Miami-Dade county. 199411 199609 ground condition Complete None planned -80.45 -80.05 26.65 25.28 none freshwater discharge surface water accoustic doppler current profiler hydrology control structures ISO 19115 Topic Category environment inlandWaters 007 012 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 United States US 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 Florida FL 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 Broward County Miami-Dade County Palm Beach County USGS Geographic Names Information System Intracoastal Waterway Biscayne Bay none Central Everglades South East Coast Florida Keys none none Eric D. Swain U.S. Geological Survey mailing and physical

3110 SW 9th Avenue

Ft. Lauderdale FL 33315 USA 954 377-5925 954 377-5901 edswain@usgs.gov http://sofia.usgs.gov/publications/fs/123-96/ coastal hydraulic control structures in eastern Miami-Dade County GIF Project personnel included Amit Kapadia and Gina Tillis The data are contained in tables in published Water-Resources Investigations Reports Eric D. Swain 1996 fact sheet USGS Fact Sheet 123-96 Tallahassee, FL U.S. Geological Survey http://sofia.usgs.gov/publications/fs/123-96/ The same measurement techniques were used at all the control structures all concurrent water-level, gate opening, and discharge data were collated and analyzed with a spreadsheet program Most of the measurements at the Broward and Palm Beach County sites were completed. The factsheet on the Miami-Dade County measurements was approved. 199609 All measurements were completed. The report for Broward and Palm Beach counties is in work. The report on Miami-Dade County measurements was approved. 199709 The report for the Broward and Palm Beach counties will be completed and approved for release. Numerical models will be created to describe the flow patterns at selected site in Miami-Dade, Broward, and Palm Beach counties that produced anomalous data. Models will be designed by January 1998 and calibrated by May 1998. In addition, analysis will be conducted on transitional flow, the flow regime that exists between orifice and weir flows. Additional measurements can be made if data appears lacking for any structure. The report on the numerical modeling is anticipated for completion by September. 199809 Eric D. Swain U.S. Geological Survey mailing and physical

3110 SW 9th Avenue

Ft. Lauderdale FL 33315 USA 954 377-5925 954 377-5901 edswain@usgs.gov east coast of Florida 0.001 0.001 Decimal degrees North American Datum of 1983 Geodetic Reference System 80 6378137 298.257 Appendix I of WRIR 98-4007 lists data for flood discharge characteristics for the coastal structures in Broward and Palm Beach counties. The data include structure, discharge rate in cubic feet/sec, degree of protection as SPF in percent, headwater elevation in feet, tailwater elevation in feet, flow regime (SWF-submerged weir flow, SOF-submerged orifice flow, FWF-free weir flow, or Pumped), for Design Flood and Structure Protection Design. Appendix II lists structural data for the coastal control structures including structure number, weir crest (net length in feet, and elevation in feet below land surface), service bridge elevation in feet, water-surface elevation in feet, number and type of gates, and size of gates in feet by height and width. Appendix I of WRIR 97-4079 lists data for flood discharge characteristics for the (Miami-)Dade County coastal structures. The data include structure, discharge rate in cubic feet/second, headwater elevation in feet, tailwater elevation in feet and flow regime for Design and Special Project Flood. Appendix II lists structural data for the coastal control structures including structure number, weir crest (net length in feet, and elevation in feet below land surface), service bridge elevation in feet, water-surface elevation in feet, number and type of gates, and size of gates in feet for diameter or height by width, number of barrels, size of barrels in inches, and length of barrels in feet. Determining Discharge-Coefficient Ratings for Selected Control Structures in Broward and Palm Beach Counties, Florida, 1998, Tillis, G. M. and Swain, E. D., USGS Water-Resources Investigations Report 98-4007 Determining discharge-coefficient ratings for coastal structures in Dade County, Florida, 1997, Swain, E.D.; Kapadia, Amit; Kone, Siaka; and others, U.S. Geological Survey Water-Resources Investigations Report 97-4079 USGS Florida Webmasters mailing and physical address

3110 SW 9th Avenue

Ft. Lauderdale FL 33315 USA not available GS-W-FL_Webmasters@usgs.gov WRIR 98-4007 No warrantees are implied or explicit for the data Adobe pdf 0.785 http://fl.water.usgs.gov/Abstracts/wri98_4007_tillis.html The report may be downloaded from USGS Publications Warehouse none USGS Publications Warehouse mailing and physical address

8505 Research Way

Middleton WI 53562 USA 608 821-3859 mccullou@usgs.gov log onto http://infotrek.er.usgs.gov/pubs/ WRIR 97-4079 No warrantees are implied or explicit for the data DJVU Viewing the report as .DJVU requires the use of a free plug-in from Lizardtech http://pubs.er.usgs.gov/usgspubs/wri/wri974079 The report may be downloaded and viewed in DJVU format or as a group of images none 20070725 Heather Henkel U.S. Geological Survey mailing and physical address

600 Fourth Street South

St. Petersburg FL 33701 USA 727 803-8747 ext 3028 727 803-2030 sofia-metadata@usgs.gov Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998