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Sediment Dynamics upon Dam Removal

Abstract

  • Sponsored by the Task Committee on Sediment Dynamics Post-Dam Removal of the Environmental and Water Resources Institute of ASCE.

    Manual of Practice 122 provides guidance, documentation, and field results for the numerical and physical modeling of sediment movement when dams are removed from waterways. Dams alter ecology, block fish passage, increase downstream scour, and displace residents. As awareness grows regarding the adverse environmental impacts of dams on ecosystems and fish populations, interest in dam removal is gaining momentum. However, the impounded sediment collected behind many dams poses another set of environmental and technical problems. This manual addresses issues such as the behavior of stored sediment and overall stream geomorphology after a dam is removed.

    MOP 122 offers information about dam removal that is valuable to watershed and river managers, environmental engineers, and consultants, as well as to researchers.

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Front Matter
i–xiv

    Part 1 Summary and Review

    Chapter 1:
    Sediment Dynamics Post-Dam Removal: State of the Science and Practice
    1–21
      Chapter 2:
      Summary and Synthesis of Experimental Research on Stored Sediment Response to Dam Removal
      23–40

        Part 2 Field Studies

        Chapter 3:
        Stream Ecosystem Response to Small Dam Removals
        41–56
          Chapter 4:
          Bureau of Reclamation Case Studies of Dam Removal
          57–65
            Chapter 5:
            Channel Evolution Upstream of Dam Removal Sites
            67–81
              Chapter 6:
              The Geomorphic Effects of Existing Dams and Historic Dam Removals in the U.S. Mid-Atlantic Region
              83–96

                Part 3 Physical Modeling

                Chapter 7:
                Physical Modeling of the Removal of Glines Canyon Dam and Lake Mills from the Elwha River, Washington
                97–114

                  Part 4 Numerical Modeling

                  Chapter 8:
                  Modeling and Measuring Bed Adjustments for River Restoration and Dam Removal: A Step toward Habitat Modeling
                  115–131
                    Chapter 9:
                    Movement of Sediment Accumulations
                    133–140
                      Chapter 10:
                      Guidelines for Numerical Modeling of Dam Removals
                      141–155
                        Chapter 11:
                        Sedimentation Studies for Dam Removal Using HEC-6T
                        157–171
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                          Index
                          173–175