Accession Number:

ADA148102

Title:

Erosion Control of Scour during Construction. Report 7. Current--A Wave-Induced Current Model.

Descriptive Note:

Technical rept. 1 Jan 81-31 Mar 82,

Corporate Author:

ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS HYDRAULICS LAB

Personal Author(s):

Report Date:

1984-09-01

Pagination or Media Count:

108.0

Abstract:

Often, large-scale engineering structures such as jetties or breakwaters are constructed in the nearshore region to stabilize navigation channels or protect harbor entrances and beaches. During construction, these structures may alter waves and currents. Waves break on such structures and the resulting turbulence causes material to be tossed into suspension and be transported from the region by wave-induced and other currents. This results in erosion at the toe of the structure since natural influx of material may not exist to replace that removed from the region. In order to ensure structural stability, it is necessary to fill this area with nonerodible material. As a result, extra quantities of material may be required, and construction costs may be overrun. To minimize cost increases due to scour during construction, it is necessary to estimate the likelihood and amount of potential scour during construction. The purpose of this study is to develop a generalized numerical model that will predict currents induced by breaking waves at locations with or without coastal structures. The model should be applicable to real-life bathymetries that are often arbitrary and irregular and must be computationally efficient and economical in view of the large numerical grids often required in engineering projects.

Subject Categories:

  • Physical and Dynamic Oceanography
  • Computer Programming and Software

Distribution Statement:

APPROVED FOR PUBLIC RELEASE