Accession Number : ADA329311

Title :   Study for Flushing of Salt Lagoon and Small-Boat Harbor Improvements at St. Paul Harbor, St. Paul Island, Alaska. Coastal Model Investigation

Descriptive Note : Final rept.

Corporate Author : ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS COASTAL HYDRAULICS LA B

Personal Author(s) : Bottin, Robert R., Jr. ; Acuff, Hugh F.

PDF Url : ADA329311

Report Date : AUG 1997

Pagination or Media Count : 68

Abstract : A 1:10-scale (undistorted) three-dimensional coastal hydraulic model was initially used to investigate the design of proposed harbor improvements at St Paul Harbor, St Paul Island, Alaska, with respect to wave and current conditions in the harbor and sediment patterns at the site. Wave-induced circulation and sediment patterns seaward of the main breakwater as a result of a submerged reef were investigated. Proposed improvements consisted of deepening the entrance channel, constructing a maneuvering area and installing a wave dissipating spending beach inside the existing harbor, and constructing a submerged reef seaward of the main breakwater. In this study, the model was reactivated to optimize flushing of Salt Lagoon and small-boat harbor improvements in St. Paul Harbor. The model reproduced approximately 2,865 m (9,400 ft) of the St Paul Island shoreline, the existing harbor, the surface area of Salt Lagoon with its connecting channels to the harbor, and sufficient offshore area in the Bering Sea to permit generation of the required test waves. An 18.3m-long (60ft-long) unidirectional, spectral wave generator, an automated data acquisition and control system, and a crushed coal tracer material were used in model operation.

Descriptors :   *HYDRAULIC MODELS, ALASKA, THREE DIMENSIONAL, PATTERNS, HYDRODYNAMICS, SEDIMENTS, HARBORS, WAVES, FLUSHING.

Subject Categories : Civil Engineering
      Hydraulic and Pneumatic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE