Development of the Tiber delta during the last 20 millennia and forecast of its changes due to expected ocean level rise

Abstract

The main of Tiber delta development during the last 20 millennia are established from historical and archeological data, seismic sounding, drilling and C¹⁴ dating. Four stages may be ascertained: l - prodelta formation during the transgression and lagoon flood at the lack of deposits (13000-6000 Bp), 2 - silt delta formation and partial filling of lagoon at the constant sea level (6000-2000 Bp), 3 - beak-shaped delta formation and man-induced draining of it's parts (2000-100 Bp), 4 - completion of delta formation and washing away its seaward side since l 940-s resulting from dam construction on Tiber and other human activities.