Sedimentation Control to Reduce Maintenance Dredging of by Committee on Sedimentation Control to Reduce Maintenance

By Committee on Sedimentation Control to Reduce Maintenance Dredging in Estuaries, Marine Board, Commission on Engineering and Technical Systems, Division on Engineering and Physical Sciences, National Research Council

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Graphical user interfaces (GUIs) are usually overview of sediment deposition 11 applied for the setup, execution, and evaluation of the extensive databases typically generated by the time-variant solution of multidimensional equations of hydrodynamics and conservation of sediment mass. On the other hand, the convenience of GUIs enables inexperienced users to unknowingly set up poorly formulated or erroneous simulations. ) It is, therefore, highly recommended that modelers seek thorough independent review of their problem formulations and results.

To the contrary, significant hydraulic, river, and sedimentation engineering experience and analyses are required with input from other biological and ecological disciplines to ensure successful project planning and design. Also of importance is the movement toward “restoration of function” as opposed to piecemeal treatment of site-specific problems. In general, a holistic view should be taken of sedimentation management to utilize both engineering and nonengineering measures where appropriate and feasible (Petts and Calow 1996; Federal Interagency Stream Restoration Working Group 1998; Copeland et al.

The design of intakes to reduce the entry of sediment is addressed, among others, by Bouvard (1992), Raudkivi (1993), and ASCE (1995). Riverbank protection is addressed by Appendix B and USACE (1991, 1994), CUR (1995), Thorne et al. (1995), and Escarameia (1998). Scour at bridges is addressed in Chapters 10 and 11 herein, and reservoir sedimentation is addressed in Chapter 12. In formulating and presenting engineering solutions, it is important to identify limitations in knowledge and uncertainties as to future outcomes and to provide flexibility for future changes if quantitative estimates and performance of works prove to be less favorable than expected.

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