This monograph is a compilation of a number of research studies presented in fourteen chapters dealing with the impact and restoration of coastal environments that have been affected by earthquakes and tsunamis. The focus is mainly on rivers, estuaries, coastal lagoons, beaches, and related ecosystems. In addition to direct impact and response due to flooding and subsequent abrasion, this publication covers physical, chemical and biological responses in coastal morphology, water quality and ecosystems and includes also topics dealing with risk reduction and vulnerability.