Abstract
The geoarchaeology of ancient harbours is based on palaeoenvironmental and palaeogeomorphological analysis and considers data issued from archaeological and historical sources. Many different kinds of evidence need to be taken into account concerning the organisation of the harbour, its chronology, and its dynamics. The “Palaeoenvironmental Age-Depth Model” (PADM) was developed in the context of a European Union (ERC Adanced Grant) funded project studying Roman ports across the Mediterranean Sea. It allows researchers to integrate all the data relevant to reconstructions of the development of harbour potential through time. The PADM is based on the analysis of one or several stratigraphic sequences with dates integrated within a classic “age-depth” model. To these is added evidence for the evolution of the water level, together with archaeological and historical data for calibrating the age-depth model (the draught of ships of specific periods, chronological data, level of quays etc.). In this paper, this diagram is tested against the case of Portus. It shows the evolution of the depositional context, and reconstructs the evolution of the water column of the harbour through time.
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