List of Roman dams and reservoirs
[3] For the most part, it concentrated on the semi-arid fringe of the empire, namely the provinces of North Africa, the Near East, and Hispania.[5] These dams are noteworthy, though, for their extraordinary height, which remained unsurpassed anywhere in the world until the Late Middle Ages.[6] These served a wide array of purposes, such as irrigation, flood control, river diversion, soil-retention, or a combination of these functions.[8] Their engineering prowess, therefore, facilitated the construction of large and novel reservoir dams, which secured a permanent water supply for urban settlements even during the dry season, a common concept today, but little-understood and -employed in ancient times.Previously unknown dam types introduced by the Romans include: The origin of the so-called weir bridges, which were to become a popular design in Iran thereafter, can also be traced to the forced labour of Roman prisoners of war (see Band-e Kaisar).