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SPH Modeling of Hydraulics and Erosion of HPTRM Levee

  • Li, Lin (Department of Civil and Environmental Engineering, Jackson State University) ;
  • Rao, Xin (Laboratory for Fishing Technology and Fishery Engineering, East China Sea Fishery Research Institute, Chinese Academy of Fishery Sciences) ;
  • Amini, Farshad (Department of Civil and Environmental Engineering, Jackson State University) ;
  • Tang, Hongwu (State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University)
  • Received : 2014.12.05
  • Accepted : 2015.02.02
  • Published : 2015.03.31

Abstract

Post-Katrina investigations revealed that most earthen levee damage occurred on the levee crest and landward-side slope as a result of either wave overtopping, storm surge overflow, or a combination of both. In this paper, combined wave overtopping and storm surge overflow of a levee embankment strengthened with high performance turf reinforcement mat (HPTRM) system was studied in a purely Lagrangian and meshless approach, two-dimensional smoothed particle hydrodynamics (SPH) model. After the SPH model is calibrated with full-scale overtopping test results, the overtopping discharge, flow thickness, flow velocity, average overtopping velocity, shear stress, and soil erosion rate are calculated. New equations are developed for average overtopping discharge. The shear stresses on landward-side slope are calculated and the characteristics of soil loss are given. Equations are also provided to estimate soil loss rate. The range of the application of these equations is discussed.

Keywords

References

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