Culvert Retrofit and Fish Passage: An Update
Publication: World Environmental and Water Resources Congress 2009: Great Rivers
Abstract
Culverts throughout the country are approaching or are past their original design lives. These `baby boomer' culverts will need to be repaired, rehabilitated, or replaced. Because entire culvert replacement is so expensive and intrusive, alternate measures to extend the culvert project life are growing increasingly popular. One such method is slip lining, where a `sleeve' is installed within an existing culvert barrel and stabilized. Plastic pipe sleeves are very popular for slip lining primarily because the plastic material's lower Manning's roughness values allow for the culvert capacity to be maintained despite a reduction in culvert size. Unfortunately, the reduced friction within the barrel can create a barrier to fish passage due to increased water velocities. The increased velocities also cause greater outlet scour which can result in further obstacles to fish passage. These new fish barriers can greatly affect aquatic ecosystems by limiting the access that fish have to smaller tributaries used for spawning and rearing—access that is critical to the life-cycles of many fish, including stream salmonid populations.
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Copyright
© 2009 American Society of Civil Engineers.
History
Published online: Apr 26, 2012
ASCE Technical Topics:
- Construction engineering
- Construction methods
- Culverts
- Ecological restoration
- Ecosystems
- Environmental engineering
- Fish and fishery management
- Flow (fluid dynamics)
- Fluid dynamics
- Fluid mechanics
- Fluid velocity
- Hydrologic engineering
- Infrastructure
- Linings
- Pipe materials
- Pipeline systems
- Pipes
- Plastic pipes
- Rehabilitation
- Water and water resources
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