A Study on Runup of Nonbreaking Double Solitary Waves on Plane Slope

The propagation and runup of the double solitary waves propagating in water of constant depth and climbing along a plane slope are studied experimentally and numerically. Well-designed run-up experiment and numerical simulation of double solitary waves are carried out. Time series of the surface elevation and waterline movement, are obtained. With regard to double solitary waves with same height, the runup amplification coefficient of the latter wave is less than that of the leading one when the relative wave crest distance is reduced to a certain threshold value. The detailed velocity field and energy budget are obtained using the numerical model and discussed in terms of characteristics of velocity field at the runup process of the double solitary waves.