U.S. Department of Transportation
Federal Highway Administration
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Washington, DC 20590
202-366-4000
Federal Highway Administration Research and Technology
Coordinating, Developing, and Delivering Highway Transportation Innovations
| REPORT |
| This report is an archived publication and may contain dated technical, contact, and link information |
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| Publication Number: FHWA-HRT-21-028 Date: February 2021 |
Publication Number: FHWA-HRT-21-028 Date: February 2021 |
PDF Version (11.6 MB)
Environmentally compatible and cost-effective strategies for stream stabilization are needed to protect transportation infrastructure adjacent to river corridors and sustain riverine functions. In this study, physical and numerical modeling of engineered logjams for stream stabilization is evaluated and proposed design guidelines are provided. The study will be useful for bridge and roadway personnel responsible for the hydraulic design of the Nation's transportation infrastructure. The study described in this report was conducted at the Federal Highway Administration Turner-Fairbank Highway Research Center J. Sterling Jones Hydraulics Laboratory.
Cheryl Allen Richter, Ph.D., P.E.
Director, Office of Infrastructure
Research and Development
Notice
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Technical Report Documentation Page
| 1. Report No.
FHWA-HRT-21-028 |
2. Government Accession No. | 3. Recipient's Catalog No. | ||
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| 4. Title and Subtitle
Applying Engineered Logjams and Dolosse for Streambank Stabilization |
5. Report Date
February 2021 |
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| 6. Performing Organization Code HRDI-40 |
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| 7. Author(s)
Oscar Suaznabar, Zhaoding Xie, Roger Kilgore, Sven Leon, Daniel Pastrich, Christoph Zuelow, Chao Huang (ORCID: 0000-0002-6034-8637), and Kornel Kerenyi |
8. Performing Organization Report No. | |||
| 9. Performing Organization Name and Address
Genex Systems, LLC |
10. Work Unit No. (TRAIS) | |||
| 11. Contract or Grant No.
DTFH61-16-D-00033-T-0003 |
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| 12. Sponsoring Agency Name and Address
Office of Infrastructure Research and Development |
13. Type of Report and Period Covered
January 2016–August 2019 |
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| 14. Sponsoring Agency Code
HRDI-40 |
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| 15. Supplementary Notes
The Contracting Officer's Representative was Kornel Kerenyi (HRDI-40). |
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| 16. Abstract
Engineers at the Federal Highway Administration Western Federal Lands Highway Division are installing long-term streambank stabilization intended to preserve highway infrastructure as well as minimize environmental impacts. An emerging approach called "engineered logjams" (ELJs), which uses precast concrete dolosse (i.e., reinforced concrete blocks in a complex geometric shape), is being considered for use in the Upper Hoh River Road bank-stabilization project. ELJs mimic logjams found in nature. Such logjams can redirect the channel flow and mitigate destructive erosive forces. As an additional benefit, the logs and debris can create or enhance fish habitat. A 1:25 scale model of a proposed ELJ design was tested in a flume for different flow conditions on movable bed and bank material. The physical modeling was complemented by computational fluid dynamic (CFD) modeling to investigate the stability of proposed ELJ installations during floods and to advance the design of ELJs for streambank stabilization. |
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| 17. Key Words
Engineered logjam, stream stabilization, dolos, dolosse, large woody debris, logjam stability, computational fluid dynamics |
18. Distribution Statement
No restrictions. This document is available through the National Technical Information Service, Springfield, VA 22161. |
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| 19. Security Classification (of this report) Unclassified |
20. Security Classification (of this page) Unclassified |
21. No. of Pages
112 |
22. Price
N/A |
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| Form DOT F 1700.7 (8-72) | Reproduction of completed page authorized |
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