Initial value problems as well as stationary solitary and periodic waves ar
e investigated for dissipative Benjamin-Ono (DBO) equation. Multi-hump stat
ionary waves and their structures are identified numerically and the stabil
ity regions of stationary periodic waves are also examined numerically. The
se results elucidate a close relation between irregular behaviours in the i
nitial value problem and the multiplicity of stationary waves. (C) 2000 Els
evier Science B.V. All rights reserved.