Dam 999 Movie

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The word dam can be tracked back to Middle English,[1] and before that, from Center Dutch, as seen in the names of numerous old cities.[2] Many early dam building took place in Mesopotamia and the Middle East. Dams were used to control the water level, for Mesopotamia's weather affected the Tigris and Euphrates rivers, and may be quite unpredictable. The earliest recognized dam is situated in Jawa, Jordan, 100 km northeast of the capital Amman. This gravity dam featured a 9 m high and 1 m wide stone wall, supported by a 50 m wide earth rampart. The structure is went out with to 3000 BC.[3][4] The Ancient Egyptian Sadd Al-Kafara at Wadi Al-Garawi, situated about 25 kilometers south associated with Cairo, was 102 m long at its base and 87 m wide. The structure had been built around 2800[5] or 2600 B. C.[6] as a diversion dam to get flood control, but was destroyed by heavy rain during construction or shortly afterwards.[5][6] Roman dam construction was seen as a "the Romans' ability to plan and organize engineering construction on a fantastic scale".[7] Roman organizers introduced the then novel concept of large reservoir dams which could safe a permanent water supply for city settlements also over the dry season.[8] Their pioneering utilization of water-proof hydraulic mortar and especially Roman concrete allowed for much bigger dam structures than previously built,[7] such as the Lake Homs Dam, possibly the largest water hurdle to date,[9] and the Harbaqa Dam, both in Roman Syria. The highest Roman dam was the Subiaco Dam near Rome; its record elevation of 50 m remained unsurpassed until its accidental destruction in 1305.[10] Roman technical engineers made routinely use of ancient regular designs like embankment dams and masonry gravity dams.[11] Apart from that, they displayed a high degree of inventiveness, introducing most of the other fundamental dam designs which had been unknown until then. These include arch-gravity dams,[12] arch dams,[13] buttress dams[14] and multiple arch buttress dams,[15] all of which were recognized and employed by the 2nd century AD (see List of Roman dams). Eflatun Pınar is a Hittite dam plus spring temple near Konya, Chicken. It's thought to the time of the Hittite empire between the 15th and thirteen century BC. The Kallanai is really a massive dam of unhewn rock, over 300 meters long, 4. 5 meters high and 20 baywatch meters (60 ft) wide, over the main stream of the Kaveri river in India. The basic structure schedules to the 2nd century AD.[16] The purpose of the dam has been to divert the waters from the Kaveri across the fertile Delta area for irrigation via canals. Man Jiang Yan is the oldest surviving irrigation system in China that will included a dam that guided waterflow. It was finished in 251 B. C. A large earthen dam, made by the Prime Minister of Chu (state), Sunshu Ao, flooded a valley in modern-day northern Anhui province that created an enormous irrigation reservoir (62 miles in circumference), a reservoir that is still existing today.[17]