Sediment management alternatives for the Port of Bienville.

Details

• Alternative Title:
  Port sedimentation solutions - Gulf Coast : sedimentation management alternatives for the port of Bienville.
• Creators:
  Sharp, Jeremy A. ; Johnson, Hunter N. ; Pevey, Kimberly C. ; McAnally, William H.
• Corporate Creators:
  Mississippi State University. Department of Civil and Environmental Engineering
• Corporate Contributors:
  Mississippi. Dept. of Transportation. Research Division
• Subject/TRT Terms:
  • Channels (Waterways)
  • Design
  • Ports
  • Relocation (Facilities)
  • Sedimentation
  • Waterway
  • navigation
  • sediment
• Publication/ Report Number:
  FHWA/MS-DOT-RD-10-199 ; MS-DOT-RD-10-199
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States ; Mississippi
• Edition:
  Final report
• Corporate Publisher:
  Mississippi. Dept. of Transportation
• Abstract:
  The objective of this report is to present economical, environmentally friendly, and effective alternatives to maintenance ; dredging for the Port of Bienville and its access channels. The Port of Bienville is located in Hancock County, directly off the ; Pearl River in the southeastern corner of Mississippi. Access to the Port from the Gulf of Mexico is provided by a channel that ; passes through Lake Borgne to the Rigolets, then through Little Lake to the Pearl River. When ports such as Bienville ; experience sediment deposition that will ultimately lead to unacceptable loss of water depth, solutions to maintain navigability ; include the traditional method of dredging or one of many other alternatives that can be complete - eliminating sediment ; deposition - or partial - reducing sediment deposition so as to reduce dredging need. Solutions tend to be unique to each ; port, for a successful design depends on port layout, waterway configuration, flow conditions, and sediment type and supply; ; however, all solutions can be placed in three categories  methods that keep sediment out of the port, methods that keep ; sediment that enters the port moving (and prevents net deposition), and methods that remove sediment after it has deposited in ; the port. The loss of all Port records during Hurricane Katrina required that other estimates of sedimentation volume, location ; and processes be made. In July 2008 the University of Southern Mississippi Hydrographic Science Program did a navigation ; chart comparison between their chart completed in July 2008 and NOAA’s navigation chart from 1995, producing a map of ; depth changes along the Pearl River. Field observations, a numerical hydrodynamic model, and standard sediment analyses were ; used to estimate sediment deposition in the Port as averaging 10,000 tons per year. Two alternatives are suggested – a sediment ; trap to capture sediment and prolong the periods between dredging and agitation to prevent sediment from consolidating on the ; bed. Neither will be cost effective at present sedimentation rates. An alternative that would reduce access dredging requirements ; and provide easier, faster access is relocation of the navigation channel from Little Lake to the lower Pearl River directly to ; Lake Borgne. A proposed design for that relocation is provided. It will require some new work dredging and relocation of a ; railroad bridge, but will provide safer, easier access and reduced channel dredging.
  More +
• Format:
  PDF
• Funding:
  State Study 199
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/30868/dot_30868_DS1.pdf
• File Type:
  [PDF - 2.49 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:2b345c8d41b787aaa83b785a21b070bc3ae6ef3f43862ebdaf1de77f53f6b490