“…Combined wave and surge overtopping has become an issue of concern in coastal engineering since hurricane Katrina, where studies show that it may be responsible for a large part of the levee failures (ASCE Hurricane Katrina External Review Panel, 2007). Studies have been conducted on the overtopping discharge, flow structure, and levee erosion processes of combined wave and surge overtopping (e.g., Hughes and Nadal, 2009;Reeve et al, 2008;Li et al, 2012;Pan et al, 2013;Pan et al, 2015;Pullen et al, 2007;Schüttrumpf et al, 2001). This paper presents some new discussion on the distribution of individual overtopping volume of combined wave and surge overtopping.…”