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Title: Wave modeling for jetty rehabilitation at the mouth of the Columbia River, Washington/Oregon, USA
Authors: Demirbilek, Zeki
Lin, Lihwa
Nwogu, Okey G.
Keywords: Boussinesq wave model
Field data
Jetty rehabilitation
Spectral wave model
Wave propagation
Wave transformation
Coastal Inlets Research Program (U.S.)
Publisher: Engineer Research and Development Center (U.S.)
Series/Report no.: Technical report (Engineer Research and Development Center (U.S.)) ; no.ERDC/CHL TR-08-3
Abstract: The U.S. Army Engineer District, Portland (NWP), maintains three rubble-mound jetties at the Mouth of the Columbia River (MCR) in support of the federal navigation project. The north and south entrance jetties constrain the current to scour the navigation channel, stabilize the location of the channel and entrance, and provide wave protection to vessels transiting the MCR. A third jetty (Jetty A) inside the MCR serves primarily as a training structure for the navigation channel to direct the flow away from the foundation of the north jetty. The jetties have significantly degraded during the past several decades. A maintenance plan is being developed to manage the jetties at the MCR to best support the federal navigation project. The U.S. Army Engineer Research and Development Center’s Coastal and Hydraulics Laboratory established numerical wave models for the MCR to evaluate the regional implications of potential future (no-action) conditions, jetty rehabilitation, and additional structures added to the jetties. The wave models were validated with NWP’s “mega-transect” data obtained during August–September 2005. The validated models were operated to obtain estimates of typical winter storm effects from northwest and southwest. Modifications to the jetties, specifically jetty length rebuilds (north jetty and south jetty) and jetty breach in the north and south jetties, were evaluated with applicable models. The changes considered in jetty length were within the original authorized lengths of those jetties. This report provides wave estimates for each jetty modification by means of two wave models, BOUSS-2D and STWAVE.
Description: Technical Report
Gov't Doc #: ERDC/CHL TR-08-3
Rights: Approved for public release; distribution is unlimited
Appears in Collections:Technical Report
Technical Report

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