SEDIMENT MOVEMENT INDUCED BY SHIPS IN RESTRICTED WATERWAYS

A numerical model using the momentum theory of the propeller and Shields' diagram was developed to study sediment movement induced by a ship's propeller in a restricted waterway. The velocity distribution downstream of the propeller was simulated by the Gaussian normal distribution function. The shear velocity and shear stress were obtained using Sternberg's formulas. Once the ship's speed, depth of the waterway, RPM and diameter of the propeller, and draft of the ship are given, the velocity distribution and the grain size of the initial motion could be obtained from this model. A computer program was developed to solve it. Case studies are presented to show the influence of significant factors on sediment movement at the channel bottom induced by a ship's propeller.

Supplemental Notes:
- (PC A05/MF A01)
Corporate Authors:
Texas A&M University, College Station

Ocean Engineering Program
College Station, TX United States 77843

National Oceanic and Atmospheric Administration

Sea Grant Program Office, 6010 Executive Boulevard
Rockville, MD United States 20852
Authors:
- Liou, Y C
- Herbich, J B
Publication Date: 1976-8

Media Info

Pagination: 99 p.

Subject/Index Terms

TRT Terms: Channels (Waterways); Depth; Distributions (Statistics); Graphs; Loads; Mathematical models; Momentum; Navigation; Propellers; Sedimentation; Sediments; Shear stress; Ships; Simulation; Transportation by load; Velocity; Water pollution; Waterways
Uncontrolled Terms: Distribution functions; Sediment transport
Old TRIS Terms: Bed load; Graphs charts; Marine propellers; Shallow water effects; Simulated sediment transport; Waterways (Transportation)
Subject Areas: Marine Transportation; Terminals and Facilities; Vehicles and Equipment;

Filing Info

Accession Number: 00146630
Record Type: Publication
Source Agency: National Technical Information Service
Report/Paper Numbers: COE-188, NOAA-76092302
Contract Numbers: NOAA-04-5-158-19
Files: TRIS
Created Date: Feb 16 1977 12:00AM