Fish Passage through Culverts: Reducing Uncertainty through an Analysis of Pipe Roughness and Velocity Distributions

Undersized culverts result in high flow speeds that prevent upstream fish passage. In Ohio, upstream fish passage is not only necessary for sustainable fish populations but also plays an important role in endangered mussel species reproduction. Previously, culverts were designed for large floods. Ecologically relevant flows, however, are more moderate and result in partially filled culverts. The variable flow depth within culverts causes the roughness (and hence the predicted flow speed) to vary with depth. Second, rather than designing culverts for the average flow speed as is classically done, the important design variable when considering fish is the speed of water that fish experience. This speed is highly unsteady and often less than the averaged flow speed currently used. This research will fill both of these gaps by publishing roughness coefficients for ecologically relevant flow and elucidating the instantaneous flow dynamics within culverts.


    • English


    • Status: Active
    • Sponsor Organizations:

      Youngstown State University, Ohio

      Center for Transportation & Materials Engineering
      One University Plaza, Moser Hall
      Youngstown, OH  United States  44555
    • Project Managers:

      Tritico, Hans

    • Start Date: 20100101
    • Expected Completion Date: 0
    • Actual Completion Date: 20101231
    • Source Data: RiP Project 24497

    Subject/Index Terms

    Filing Info

    • Accession Number: 01461795
    • Record Type: Research project
    • Source Agency: Youngstown State University Center for Transportation and Materials Engineering
    • Files: UTC, RIP
    • Created Date: Jan 3 2013 1:52PM