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The development and characteristics of ancient harbours. Applying the PADM chart to the case studies of Ostia and Portus

Salomon, Ferreol, Keay, Simon, Carayon, Nicolas and Goiran, Jean-Philippe (2016) The development and characteristics of ancient harbours. Applying the PADM chart to the case studies of Ostia and Portus PLoS ONE, 11, (9), pp. 1-23. (doi:10.1371/journal.pone.0162587).

Record type: Article

Abstract

Over the last 20 years, the geoarchaeology of ancient harbours has been a very active area of research around the Mediterranean basin, generating much palaeoenvironmental data from many sites, including estimations of sedimentation rates, the height of the ancient sea-level at different dates and palaeo-geographical reconstructions. Combining this information has proved a major challenge. This article proposes a new chart called the Palaeoenvironmental Age-Depth Model (PADM chart), that allows the researchers to combine all relevant indicators in order to estimate harbour potential of a given ancient port, and to generate comparable data between harbours in terms of degree of closure and water depth available against a synchronised chronology. This new approach, developed in the context of the ERC-funded RoMP Portuslimen project, takes into account estimations of water depths relating to differing Roman ship draughts at different periods. It is tested against the palaeoenvironmental evidence published over 10 years from two Roman harbours located at the mouth of the river Tiber: Ostia and Portus. This reveals that: (1) there has been an underestimate of the real sedimentation rates due to the margins of error of the radiocarbon dates; (2) there was effective control of the water column by dredging; (3) there were different periods of control of the sedimentation. We suggest that the navigability of the Ostia harbour by ships with shallower draughts was maintained until sometime between the 2nd c. BC and 1st c. AD, while at Portus it was retained until the 6th - 7th c. AD.

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More information

Accepted/In Press date: 25 August 2016
e-pub ahead of print date: 15 September 2016
Published date: 15 September 2016
Organisations: Archaeology

Identifiers

Local EPrints ID: 399764
URI: http://eprints.soton.ac.uk/id/eprint/399764
ISSN: 1932-6203
PURE UUID: 8779062c-01bd-42a6-b9c5-82f749eb5e30

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Date deposited: 08 Sep 2016 12:33
Last modified: 03 Oct 2017 16:35

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Contributors

Author: Ferreol Salomon
Author: Simon Keay
Author: Nicolas Carayon
Author: Jean-Philippe Goiran

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