SPILLWAYS Spillways: Functions and Classification Spillway Design: An Overview Spillway Design Flood: Estimation and Selection Ogee or Overflow Spillways Chute and Side Channel Spillways Stepped Spillways Siphon Spillways Shaft Spillways Labyrinth and Duckbill Spillways Tunnel and Culvert Spillways Free Jet and Straight Drop Spillways Fuse Plugs and Fuse Gate Spillways Spillways for Flood and Sediment Disposal Unlined Spillways Inflatable Rubber Weirs Overtopping Protection of Dams Used as Spillways Spillway Crest Gates ENERGY DISSIPATION Energy Dissipators for Spillways Hydraulic Jump Stilling Basins Trajectory Buckets Solid and Slotted Roller Buckets Energy Dissipators for Shaft and Tunnel Spillways Impact-Type Energy Dissipators Unconventional Designs CAVITATION AND AIR ENTRAINMENT Cavitation in Spillways and Energy Dissipators Air Entainment and Forced Aeration HYDRAULIC MODELLING Hydraulic Modelling of Spillways