what is a coastal system
Making the world better, one answer at a time. a coastal system is typically characterized as the erosinal and depositional processes at a particular coastline.he deposition and onlap of coastal non-marine and littoral deposits further and further inland, due to a relative rise in sea level. If, subsequently, relative sea level fall â¦ s, the base level is lowered and erosion probably occurs at the top of the sequence.