Dara Dam

Daraan advanced arch daman elaborate arch dam
The Dara Dam was a Roman arch dam at Dara in Mesopotamia (modern-day Turkey), a rare pre-modern example of this dam type.wikipedia
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Arch dam

archconcrete archmultiple-arch dam
The Dara Dam was a Roman arch dam at Dara in Mesopotamia (modern-day Turkey), a rare pre-modern example of this dam type.
The Dara Dam was another arch dam built by the Romans in which the historian Procopius would write of its design: "This barrier was not built in a straight line, but was bent into the shape of a crescent, so that the curve, by lying against the current of the river, might be able to offer still more resistance to the force of the stream."

Dara (Mesopotamia)

DaraDarasDara Syrorum of the Syriacs
The Dara Dam was a Roman arch dam at Dara in Mesopotamia (modern-day Turkey), a rare pre-modern example of this dam type.
To avert the danger of flooding, which had already once wrecked large parts of the city, an elaborate arch dam was built to contain it, one of the earliest known of its kind.

Justinian I

JustinianEmperor JustinianJustinian the Great
The construction and design of the dam was related by the East Roman historian Procopius around 560 AD in his treatise on the architectural achievements of the Justinian I era (De Aedificiis II.3).
To prevent floods from damaging the strategically important border town Dara, an advanced arch dam was built.

Glanum Dam

the dam at Glanum
Another ancient dam working by arch action was the Glanum Dam in France.

Ancient Rome

RomanRomansRome
The Dara Dam was a Roman arch dam at Dara in Mesopotamia (modern-day Turkey), a rare pre-modern example of this dam type.

Mesopotamia

MesopotamianMesopotamiansAncient Iraq
The Dara Dam was a Roman arch dam at Dara in Mesopotamia (modern-day Turkey), a rare pre-modern example of this dam type.

Turkey

TurkishRepublic of TurkeyTUR
The Dara Dam was a Roman arch dam at Dara in Mesopotamia (modern-day Turkey), a rare pre-modern example of this dam type.

Gravity dam

gravityconcrete gravityConcrete Gravity dam
The modern identification of its site is uncertain, but may rather point to a common gravity dam. His report is notable for its clear understanding of arch action and the distribution of water pressure in arch dams; it provides the earliest description of such types of dam as opposed to the gravity dam, the standard design throughout antiquity and beyond.

Byzantine Empire

ByzantineEastern Roman EmpireByzantines
The construction and design of the dam was related by the East Roman historian Procopius around 560 AD in his treatise on the architectural achievements of the Justinian I era (De Aedificiis II.3).

Procopius

Procopius of CaesareaDe aedificiisSecret History
The construction and design of the dam was related by the East Roman historian Procopius around 560 AD in his treatise on the architectural achievements of the Justinian I era (De Aedificiis II.3).

Ancient history

antiquityancientancient world
His report is notable for its clear understanding of arch action and the distribution of water pressure in arch dams; it provides the earliest description of such types of dam as opposed to the gravity dam, the standard design throughout antiquity and beyond.

Abutment

abutmentspylonbridge abutment
Procopius makes two essential points clear: first, the dam had a curved plan in order to withstand the water pressure, and did not follow a more or less curved line just because this was where the most solid bedrock was found, and secondly, the thrust of the water was not contained by the sheer weight of the structure (as in gravity dams), but transferred by the abutments to the wing walls of the gorge through the curvature of the lying arch.

Arch

archesround archarched
Procopius makes two essential points clear: first, the dam had a curved plan in order to withstand the water pressure, and did not follow a more or less curved line just because this was where the most solid bedrock was found, and secondly, the thrust of the water was not contained by the sheer weight of the structure (as in gravity dams), but transferred by the abutments to the wing walls of the gorge through the curvature of the lying arch.

France

FrenchFRAFrench Republic
Another ancient dam working by arch action was the Glanum Dam in France.

Germany

GermanGERFederal Republic of Germany
Field work on the ground by the German scholar Günther Garbrecht in the late 1980s has raised some doubts whether Procopius's account are to be interpreted as referring to an arch dam.

Roman concrete

opus caementiciumconcreteconcrete dome
4 m wide and 5 m high masonry wall with a Roman concrete core, had an estimated crest length of 180–190 m; its middle section was completely destroyed on a length of 60–70 m. Although it cannot be ruled out that the dam once followed a slightly curved course in the gap, the extant flanking walls rather indicate a polygonal ground plan.

Polygon

polygonalpolygonsn''-gonal
4 m wide and 5 m high masonry wall with a Roman concrete core, had an estimated crest length of 180–190 m; its middle section was completely destroyed on a length of 60–70 m. Although it cannot be ruled out that the dam once followed a slightly curved course in the gap, the extant flanking walls rather indicate a polygonal ground plan.

Firmament

star designvault of heavenWelkin
Garbrecht surmises that the irregular shape of the dam may have led Procopius to a poetical allusion to the crescent-shaped firmament.

Survey (archaeology)

archaeological surveyarchaeological field surveyfield survey
By his own admission, however, his observations in situ fell short of a systematic hydrological and topographical field survey which he urged in view of the continuing deterioration of the ancient site.

List of Greek and Roman architectural records

List of ancient architectural recordsGreco Roman architectureRecord-holding bridges in antiquity

List of dams and reservoirs in India

List of reservoirs and dams in IndiaDams and reservoirs in Indiadams in India