chapter 2 Shallow-water (SW) formulation for high-Re flows -- chapter 3 The steady-state current and nose jump conditions -- chapter 4 Box models for 2D geometry -- chapter 5 Two-layer SW model -- chapter 6 Axisymmetric currents, SW formulation -- chapter 7 Box models for axisymmetric geometry -- chapter 8 Effects of rotation -- chapter 9 Buoyancy decays: particle-driven current, porous boundary, and entrainment -- chapter 10 Non-Boussinesq systems -- chapter 11 Lubrication theory formulation for viscous currents -- chapter 12 Continuous density transition -- chapter 13 Axisymmetric and rotating cases -- chapter 14 The steady-state current -- chapter 15 Intrusions in 2D geometry -- chapter 16 Intrusions in axisymmetric geometry -- chapter 17 Box models for 2D geometry -- chapter 18 Box models for axisymmetric geometry -- chapter 19 Lubrication theory for viscous currents with S = 1 -- chapter 20 Energy.