|
Dams In California
A dam is a barrier that stops or restricts the flow of surface water or underground streams. Reservoirs created by dams not only suppress floods but also provide water for activities such as irrigation, human consumption, industrial use, aquaculture, and navigability. Hydropower is often used in conjunction with dams to generate electricity. A dam can also be used to collect or store water which can be evenly distributed between locations. Dams generally serve the primary purpose of retaining water, while other structures such as floodgates or levees (also known as dikes) are used to manage or prevent water flow into specific land regions. The earliest known dam is the Jawa Dam in Jordan, dating to 3,000 BC. The word ''dam'' can be traced back to Middle English, and before that, from Middle Dutch, as seen in the names of many old cities, such as Amsterdam and Rotterdam. History Ancient dams Early dam building took place in Mesopotamia and the Middle East. Dams were used ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amsterdam
Amsterdam ( , , , lit. ''The Dam on the River Amstel'') is the Capital of the Netherlands, capital and Municipalities of the Netherlands, most populous city of the Netherlands, with The Hague being the seat of government. It has a population of 907,976 within the city proper, 1,558,755 in the City Region of Amsterdam, urban area and 2,480,394 in the Amsterdam metropolitan area, metropolitan area. Located in the Provinces of the Netherlands, Dutch province of North Holland, Amsterdam is colloquially referred to as the "Venice of the North", for its large number of canals, now designated a World Heritage Site, UNESCO World Heritage Site. Amsterdam was founded at the mouth of the Amstel River that was dammed to control flooding; the city's name derives from the Amstel dam. Originally a small fishing village in the late 12th century, Amsterdam became a major world port during the Dutch Golden Age of the 17th century, when the Netherlands was an economic powerhouse. Amsterdam is th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amenemhat IV
:''See Amenemhat, for other individuals with this name.'' Amenemhat IV (also known as Amenemhet IV) was the seventh and penultimateJürgen von Beckerath: ''Handbuch der ägyptischen Königsnamen'', Münchner ägyptologische Studien, Heft 49, Mainz : Philip von Zabern, 1999, , see pp. 86–87, king No 7. and p. 283 for the dates of Amenemhat IV's reign. king of the Twelfth Dynasty of Egypt (c. 1990–1800 BC) during the late Middle Kingdom period (c. 2050–1710 BC), ruling for more than nine years in the late nineteenth century BC or the early eighteenth century BC.Darrell D. Baker: The Encyclopedia of the Pharaohs: Volume I – Predynastic to the Twentieth Dynasty 3300–1069 BC, Stacey International, , 2008, p. 30–32 K.S.B. Ryholt: ''The Political Situation in Egypt during the Second Intermediate Period, c. 1800–1550 BC'', Carsten Niebuhr Institute Publications, vol. 20. Copenhagen: Museum Tusculanum Press, 1997excerpts available online here./ref> Amenem ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amenemhat III
:''See Amenemhat, for other individuals with this name.'' Amenemhat III ( Ancient Egyptian: ''Ỉmn-m-hꜣt'' meaning 'Amun is at the forefront'), also known as Amenemhet III, was a pharaoh of ancient Egypt and the sixth king of the Twelfth Dynasty of the Middle Kingdom. He was elevated to throne as co-regent by his father Senusret III, with whom he shared the throne as the active king for twenty years. During his reign, Egypt attained its cultural and economic zenith of the Middle Kingdom. The aggressive military and domestic policies of Senusret III, which re-subjugated Nubia and wrested power from the nomarchs, allowed Amenemhat III to inherit a stable and peaceful Egypt. He directed his efforts towards an extensive building program with particular focus on Faiyum. Here he dedicated a temple to Sobek, a chapel to Renenutet, erected two colossal statues of himself in Biahmu, and contributed to excavation of Lake Moeris. He built for himself two pyramids at Dahshur and Hawar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Twelfth Dynasty Of Egypt
The Twelfth Dynasty of ancient Egypt (Dynasty XII) is considered to be the apex of the Middle Kingdom by Egyptologists. It often is combined with the Eleventh, Thirteenth, and Fourteenth dynasties under the group title, Middle Kingdom. Some scholars only consider the 11th and 12th dynasties to be part of the Middle Kingdom. History The chronology of the Twelfth Dynasty is the most stable of any period before the New Kingdom. The Turin Royal Canon gives 213 years (1991–1778 BC). Manetho stated that it was based in Thebes, but from contemporary records it is clear that the first king of this dynasty, Amenemhat I, moved its capital to a new city named "Amenemhat-itj-tawy" ("Amenemhat the Seizer of the Two Lands"), more simply called, Itjtawy. The location of Itjtawy has not been discovered yet, but is thought to be near the Fayyum, probably near the royal graveyards at el-Lisht. The order of its rulers of the Twelfth Dynasty is well known from several sources: two lists re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diversion Dam
A diversion dam is a dam that diverts all or a portion of the flow of a river from its natural course. Diversion dams do not generally impound water in a reservoir; instead, the water is diverted into an artificial water course or canal, which may be used for irrigation or return to the river after passing through hydroelectric generators, flow into a different river or be itself dammed forming an onground or groundwater reservoir or a storm drain. An early diversion dam is the Ancient Egyptian Sadd el-Kafara Dam at Wadi Al-Garawi, which was located about twenty five kilometres south of Cairo. Built around 2600 BC for flood control, the structure was 102 metres long at its base and 87 metres wide. It was destroyed by a flood while it was still under construction.Günther Garbrecht: "Wasserspeicher (Talsperren) in der Antike", ''Antike Welt'', 2nd special edition: ''Antiker Wasserbau'' (1986), pp.51-64 (52f.) Classification Diversion dams are one of three classifications ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cairo
Cairo ( ; ar, القاهرة, al-Qāhirah, ) is the capital of Egypt and its largest city, home to 10 million people. It is also part of the largest urban agglomeration in Africa, the Arab world and the Middle East: The Greater Cairo metropolitan area, with a population of 21.9 million, is the 12th-largest in the world by population. Cairo is associated with ancient Egypt, as the Giza pyramid complex and the ancient cities of Memphis and Heliopolis are located in its geographical area. Located near the Nile Delta, the city first developed as Fustat, a settlement founded after the Muslim conquest of Egypt in 640 next to an existing ancient Roman fortress, Babylon. Under the Fatimid dynasty a new city, ''al-Qāhirah'', was founded nearby in 969. It later superseded Fustat as the main urban centre during the Ayyubid and Mamluk periods (12th–16th centuries). Cairo has long been a centre of the region's political and cultural life, and is titled "the city of a thousand m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sadd-el-Kafara Dam
Sadd el-Kafara ("Dam of the Infidels") was a masonry embankment dam on Wadi al-Garawi 10 km southeast of Helwan in Helwan Governorate, Egypt. The dam was built in the first half of the third millennium BC by the ancient Egyptians for flood control and is the oldest dam of such size in the world. Never completed, the dam was under construction for 10–12 years before being destroyed by a flood. It was rediscovered by Georg Schweinfurth in 1885. Specifications The dam was not finished but was about 111m long and 14m tall with a base width of 98m and crest width of 56m. The dam's core was 32m wide and consisted of 60,000 tons of earth and rock-fill. Surrounding the core were two loosely filled rubble and rock-fill layer-walls. The downstream wall was about 37m wide, the upstream wall about 29m wide and they encompassed of material. Encasing the dam were upstream and downstream walls created from limestone ashlars. The ashlars were set but not mortared in stepped rows. Each ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amman
Amman (; ar, عَمَّان, ' ; Ammonite language, Ammonite: 𐤓𐤁𐤕 𐤏𐤌𐤍 ''Rabat ʻAmān'') is the capital and largest city of Jordan, and the country's economic, political, and cultural center. With a population of 4,061,150 as of 2021, Amman is Jordan's primate city and is the List of largest cities in the Levant region by population, largest city in the Levant region, the list of largest cities in the Arab world, fifth-largest city in the Arab world, and the list of largest metropolitan areas of the Middle East, ninth largest metropolitan area in the Middle East. The earliest evidence of settlement in Amman dates to the 8th millennium BC, in a Neolithic site known as ʿAin Ghazal, 'Ain Ghazal, where the world's ʿAin Ghazal statues, oldest statues of the human form have been unearthed. During the Iron Age, the city was known as Rabat Aman and served as the capital of the Ammon, Ammonite Kingdom. In the 3rd century BC, Ptolemy II Philadelphus, Pharaoh of Ptole ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Euphrates
The Euphrates () is the longest and one of the most historically important rivers of Western Asia. Tigris–Euphrates river system, Together with the Tigris, it is one of the two defining rivers of Mesopotamia ( ''the land between the rivers''). Originating in Turkey, the Euphrates flows through Syria and Iraq to join the Tigris in the Shatt al-Arab, which empties into the Persian Gulf. Etymology The Ancient Greek form ''Euphrátēs'' ( grc, Εὐφράτης, as if from Greek εὖ "good" and φράζω "I announce or declare") was adapted from Old Persian 𐎢𐎳𐎼𐎠𐎬𐎢 ''Ufrātu'', itself from Elamite language, Elamite 𒌑𒅁𒊏𒌅𒅖 ''ú-ip-ra-tu-iš''. The Elamite name is ultimately derived from a name spelt in cuneiform as 𒌓𒄒𒉣 , which read as Sumerian language, Sumerian is "Buranuna" and read as Akkadian language, Akkadian is "Purattu"; many cuneiform signs have a Sumerian pronunciation and an Akkadian pronunciation, taken from a Sumerian word a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tigris
The Tigris () is the easternmost of the two great rivers that define Mesopotamia, the other being the Euphrates. The river flows south from the mountains of the Armenian Highlands through the Syrian and Arabian Deserts, and empties into the Persian Gulf. Geography The Tigris is 1,750 km (1,090 mi) long, rising in the Taurus Mountains of eastern Turkey about 25 km (16 mi) southeast of the city of Elazığ and about 30 km (20 mi) from the headwaters of the Euphrates. The river then flows for 400 km (250 mi) through Southeastern Turkey before becoming part of the Syria-Turkey border. This stretch of 44 km (27 mi) is the only part of the river that is located in Syria. Some of its affluences are Garzan, Anbarçayi, Batman, and the Great and the Little Zab. Close to its confluence with the Euphrates, the Tigris splits into several channels. First, the artificial Shatt al-Hayy branches off, to join the Euphrates near Nasiriyah. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
.jpg "Click for more on -> Amsterdam")
.jpg "Click for more on -> Amenemhat III")
