This chapter experimentally investigated the impacts of rough-impermeable/permeable beds on turbulent kinetic energy (TKE), turbulence intermittency, and anisotropy of gravity currents. Results reveal that the larger bed roughness or porosity leads to smaller upper TKE peaks. The lower TKE peaks are inversely proportional to the bed roughness, while proportional to the bed porosity. Rough surfaces intensify the asymmetry around maximum streamwise velocity resulting in a transfer barrier of turbulent momentum. Inside the gravity current, the turbulent momentum fluxes transfer downstream and downward, which favors the sweep events. Inside the ambient water, they transfer upstream and upward, contributing to the formation of ejection events. At the current-ambient water interface, they do not tend to transfer in particular directions resulting in almost equal quantities of sweep and ejection events. From the bed to the free surface, the anisotropy invariant maps appear as the two-component plain strain limit, three-dimensional isotropy, axisymmetric contraction limit and two-dimensional isotropy. Along the streamwise direction, the rough-permeable boundary causes alternations between the anisotropic and isotropic turbulence, but the arranged patterns of bed emelents determine the period of these alternations.