MiamiHarbor_Factsheet_Jan2019.pdf
PDF 1 MB Posted
- Attached to
- SE Florida Sediment Morphodynamics Federal contract opportunity
- Solicitation number
- PANSAD19P0000001437
About this file
Miami Harbor Fact Sheet; this supplements Question 9 on the QA Final sheet
View the file
Other files for this federal contract opportunity
| File | Type | Posted |
|---|---|---|
| Solicitation_Q&A_Final.pdf | ||
| WD_15-4573_Palm_Beach_County.docx | DOCX document | |
| WD_15-4535_Broward_County.docx | DOCX document | |
| WD_07-0134_FL_Diver_Services.docx | DOCX document | |
| WD_15-4543_Miami-Dade_County.docx | DOCX document | |
| PWS_SE_FL_Sediment_Morphodynamics_Final.pdf | ||
| Combo_SE_FL_Sediment_Morphodynamics.pdf |
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Text version
MIAMI HARBOR | Sediment Tracing Study
F A C T S H E E T
January 2019
BACKGROUND AND PURPOSE
The Port of Miami is situated in the Biscayne Bay, which is home to many protected, threatened and endangered species including the Florida manatee, sea turtle species and bottlenose dolphins, in addition to numerous important recreational and commercial fish species. Terrestrial and marine habitats surrounding the Port include beaches, mangroves, seagrass beds and hardbottom and reef communities. From 2013 to 2015, the Port was deepened and widened to 50/52 feet.
Due to the dredging project's proximity to hardbottom /reef communities, and the turbidity and sedimentation generated by dredging operations, approximately 252 acres of hardbottom was delineated for additional evaluation of dredging induced sedimentation. The goal of the Sediment Tracing Study was to assess the dispersal and fate of fine sediment (and coarse sand-sized sediment) in the project area to better understand the hydrodynamic and sediment transport potentials.
STUDY DETAILS
Five fluorescent silt and three sand particle tracers were used in this study. The tracers were manufactured to have a density of 2.65 gram per cubic centimeter (g/cm3) to match silica, and were released in late June 2017.
Three field sampling surveys were carried out between August and December 2017, using divers to collect seabed sediment samples to measure the movement, pathways and pattern of distribution of the five sediment tracers over time approximately 40 to 45 days, 90 to 95 days and 150 to 167 days post-tracer release for Round 1, 2 and 3 sampling surveys, respectively.
All sediment samples were analyzed for tracer count and in the case of sand tracers, tracer particle size also to determine what size fraction was mobile for the metocean conditions and what size fraction remained on the seabed or at the release site over time.
Image shows the study area indicating all seabed sediment sample stations, tracer release sites, and metocean instrument moorings.
U.S. Army Corps of Engineers Jacksonville District P.O. Box 4970 Jacksonville, FL 32232-0019
“A Team of Professionals, Making Tomorrow Better”
WWW.SAJ.USACE.ARMY.MIL
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