Numerical Model Study of the Flows around Pile Dikes and Conventional Rock Dikes in the Columbia River
Abstract
Pile dikes in the Columbia River are approaching the end of their expected service life. Two replacement options have been suggested: similarly shaped pile dikes and conventional rock dikes. A three-dimensional numerical model study has been conducted to provide flow information to support a decision between the two replacement options. This study focuses on the Cottonwood Island site on the Columbia River. The primary interest is determining the potential navigation impacts of changing from the pile dikes to the conventional rock dikes. The results of this model will also be used to study the secondary interests of effects to fish habitat and the possible operation concerns of scour potential and sediment deposition between the dikes. This report contains a discussion of the geometry and computational mesh development and flow solver used. The flow solutions are presented as contour plots in multiple areas of the flow domain. General trends among the flow solutions between the two types of dikes are evaluated and discussed.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 2019
- Accession Number
- AD1081391
Entities
People
- Allen Hammack
- David S. Smith
- Morgan M. Johnston
Organizations
- Engineer Research and Development Center