Location
Agriculture Science Theater, Oregon State University
Start Date
27-6-2013 2:10 PM
End Date
27-6-2013 2:30 PM
Description
Roughened channel design guidance from Washington Department of Fish and Wildlife, while described in the Water Crossing Design Guidance document, is informed by both traditional engineering research and professional experience. The broad definition of a roughened channel is a man-made channel whose slope exceeds the prevailing channel reach slope by 25% or more. They are seen as a less preferred option relative to stream simulation and no-slope designs, and limited to sites where those options are not feasible. Roughened channel design is complicated and requires the most detailed engineering process of all accepted road crossing fish passage designs. The general design process includes the following steps:
1. Calculation of average channel velocity up to the high fish passage flow.
2. Bed stability calculations for low probability floods, typically the 100-year flood.
3. Consideration of turbulence through Energy Dissipation Factor (EDF) calculation.
4. Address channel porosity by bed material gradation design. Specific design features will be illustrated in examples of constructed roughened channels.
Concurrent Sessions D: Designing Roughened Channels for Fish Passage - Roughened Channel Design - The WDFW Perspective
Agriculture Science Theater, Oregon State University
Roughened channel design guidance from Washington Department of Fish and Wildlife, while described in the Water Crossing Design Guidance document, is informed by both traditional engineering research and professional experience. The broad definition of a roughened channel is a man-made channel whose slope exceeds the prevailing channel reach slope by 25% or more. They are seen as a less preferred option relative to stream simulation and no-slope designs, and limited to sites where those options are not feasible. Roughened channel design is complicated and requires the most detailed engineering process of all accepted road crossing fish passage designs. The general design process includes the following steps:
1. Calculation of average channel velocity up to the high fish passage flow.
2. Bed stability calculations for low probability floods, typically the 100-year flood.
3. Consideration of turbulence through Energy Dissipation Factor (EDF) calculation.
4. Address channel porosity by bed material gradation design. Specific design features will be illustrated in examples of constructed roughened channels.
Comments
Bruce Heiner
1989
-present: Civil/Environmental engineer for Washington Department of Fisheries/Fish and Wildlife. Technical review and design of various fish passage and habitat restoration proposals.
1989
-MS. Civil Engineering, Washington State University
1984
-BS. Fishery Resources, University of Idaho
1964
-present: avid fisherman