The prediction of wave runup, as well as its components, time-averaged setup and the time-
varying swash, is a key element of coastal storm hazard assessments, as wave runup
controls the transitions between morphodynamic response types such as dune erosion and
overwash, and the potential for flooding by wave overtopping. While theoretically able to
simulate the dominant low-frequency swash, previous studies using the infragravity-wave–
resolving model XBeach (XBSB) have shown an underestimation of the observed swash …

The prediction of wave runup, as well as its components, time-averaged setup and the time-
varying swash, is a key element of coastal storm hazard assessments, as wave runup
controls the transitions between morphodynamic response types such as dune erosion and
overwash, and the potential for flooding by wave overtopping. While theoretically able to
simulate the dominant low-frequency swash, previous studies using the infragravity-wave–
resolving model XBeach (XBSB) have shown an underestimation of the observed swash …