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Document Details : Title: OSL Dating of Submerged Ancient Jareh Bridge-Dam (South-West of Iran) Author(s): FATTAHI, Morteza , SHARIFI, Mahnaz Journal: Iranica Antiqua Volume: 56 Date: 2021 Pages: 211-243 DOI: 10.2143/IA.56.0.3290276 Abstract : The aim of this paper is to date, introduce and document the ancient Jareh bridge-dam which had remained intact for hundreds of years, and was submerged in 2015 due to the construction of a new, larger dam on the Zard River. It is a solid structure with a height of 19 meters and a length of more than 89 m. The width of this dam from one end to the other varies from 1 m to 10 m. The location of this bridge is appropriate in terms of the river’s course according to the type of the land, materials and design of the base, body and calculation of resistance during the outbreak of water, which are fastened to the base strength with their rocks and masonry. This dam can be found 35 km northwest of the Ramhormoz township in Khuzestan province, Iran; and has been constructed in narrow valleys within the Zard River by stones and plaster. Two OSL samples were taken from this bridge in 2007. By employing the Minimum Age Model, the date of erection of the Jareh bridge-dam was estimated to be between 1420-2090 years ago, falling within the Sassanid period. The Jareh bridge-dam is one of the largest Sasanian bridge-dams in the Khuzestan province. This study provides an understanding of the performance, the structure, and the hydraulic mechanism of the Jareh bridge-dam, and also the role played by it as a deterrent against the outbreak of the Zard River. |
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