Introduction Page 2 of 3 Assumption: Waves are soliton-like existence of solitary waves interaction is elastic and nonlinear (Hammack et al. 1995) Mathematical tools: Soliton theory, Hirota bilinear formalism, (2+1)-dim. KdV type equations, multi-soliton solutions Basic idea: Associate waves with solitons and wave patterns with interaction patterns of solitons