Schematic depiction of coastal wave runup

Schematic depiction of wave runup (h_runup) with its components of setup (h_setup) and time-varying swash (dashed lines). Wave runup is the time-varying elevation of water level at the shoreline, measured here in reference to the still-water level (SWL). As wave runup is based on wave action, this schematic depicts the resultant water level as a function of wave height (H) and beach slope (β). (Modified from: https://www.usgs.gov/media/images/wave-runup-r-time-varying-elevation-water-level-sho)