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Lower Mesopotamia
Lower Mesopotamia is a historical region of Mesopotamia. It's located in the alluvial plain of Iraq from the Hamrin Mountains to the Faw Peninsula near the Persian Gulf. In the Middle Ages it was also known as the ''Sawad'' and al-Jazira al-sflia ("Lower Jazira"), which strictly speaking designated only the southern alluvial plain, and ''al-ʻIrāq al-ʻArabi'' ("Arabian Irāq"), as opposed to " Persian Iraq", the Jibal. Lower Mesopotamia was home to Sumer and Babylonia. Regions of Iraq Delimitation The medieval Arab geographers placed the northern border between Iraq and Upper Mesopotamia (the ''Jazirah'') in a line running from Anbar on the Euphrates to Tikrit on the Tigris, although later it was shifted to a line running due west from Tikrit, thus including several towns on the Euphrates past Anbar into Iraq. Geography An alluvial plain begins north of Tikrit Near Hamrin Mountains and extends to the Persian Gulf. Here the Tigris and Euphrates lie above the level of the p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Historical Region
Historical regions (or historical areas) are geographical regions which at some point in time had a cultural, ethnic, linguistic or political basis, regardless of latterday borders. They are used as delimitations for studying and analysing social development of period-specific cultures without any reference to contemporary political, economic or social organisations. The fundamental principle underlying this view is that older political and mental structures exist which exercise greater influence on the spatial-social identity of individuals than is understood by the contemporary world, bound to and often blinded by its own worldview - e.g. the focus on the nation-state. Definitions of regions vary,xiii, Tägil and regions can include macroregions such as Europe, territories of traditional states or smaller microregional areas. A geographic proximity is the often required precondition for emergence of a regional identity. In Europe, the regional identities are often deri ... [...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. 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 𒌑𒅁𒊏𒌅𒅖 ''ú-ip-ra-tu-iš''. The Elamite name is ultimately derived from a name spelt in cuneiform as 𒌓𒄒𒉣 , which read as Sumerian is "Buranuna" and read as Akkadian is "Purattu"; many cuneiform signs have a Sumerian pronunciation and an Akkadian pronunciation, taken from a Sumerian word and an Akkadian word that mean the same. In Akkadian the river was called ''Purattu'', ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lake Tharthar
Lake Tharthar (also Therthar), and known in Iraq as Buhayrat ath-Tharthar ( ar, بحيرة الثرثار), is an artificial lake opened in 1956, situated 100 kilometers (62 mi) northwest of Baghdad between the Tigris and the Euphrates rivers. History In 1956, the southern part of the Tharthar depression was turned into an artificial reservoir to collect floodwaters of the Tigris River. The water flows via an artificial inlet canal, named Tharthar Canal. The canal diverts the excess water, by means of a regulator Samarra Barrage. It merges with the lake in its southeastern bank. The lake has an artificial outlet called Taksim Tharthar Canal, which drains to the Euphrates River directly. The canal, after 28 km (17.4 mi) from its outlet, bifurcates to another canal called "Dhira'a Dijla" (arm of tigris) that returns water back to the Tigris River. Lake Tharthar was the site of a raid in 2005 against an insurgent training base in the region. Description The Tharthar depression w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lake Milh
Lake Milh (, literally Sea of Salt, pronounced ''Bahr al-Milh''), also known as Razzaza Lake, is located a few miles west of Karbala, Iraq (). It is alternately called Lake Razazah (). Lake Milh is a depression into which excess water from Lake Habbaniyah, which comes from the Euphrates River, is diverted through a controlled escape channel or canal. The lake is listed as a wetland of international importance. The lake is rather shallow and water levels change with the seasons. Due to the salts and the changing water levels, this largest freshwater lake in Iraq has lost its important stock of fish species and only a few recreational areas exist around the lake. Geography The lake, also termed as "Kerbala Gap” has a large expanse of enclosed by deserts with a few low hills on the shore line. The lake and its surrounding areas lie in an elevation range of . It is a deep closed lake in a sand/silt basin. The lake's western part of the valley has thick forest cover, apart from orc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Salinity
Salinity () is the saltiness or amount of salt (chemistry), salt dissolved in a body of water, called saline water (see also soil salinity). It is usually measured in g/L or g/kg (grams of salt per liter/kilogram of water; the latter is dimensionless and equal to ‰). Salinity is an important factor in determining many aspects of the chemistry of natural waters and of biological processes within it, and is a state function, thermodynamic state variable that, along with temperature and pressure, governs physical characteristics like the density and heat capacity of the water. A contour line of constant salinity is called an ''isohaline'', or sometimes ''isohale''. Definitions Salinity in rivers, lakes, and the ocean is conceptually simple, but technically challenging to define and measure precisely. Conceptually the salinity is the quantity of dissolved salt content of the water. Salts are compounds like sodium chloride, magnesium sulfate, potassium nitrate, and sodium bicarbo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amarah
Amarah ( ar, ٱلْعَمَارَة, al-ʿAmārah), also spelled Amara, is a city in south-eastern Iraq, located on a low ridge next to the Tigris River waterway south of Baghdad about 50 km (31 mi) from the border with Iran. It lies at the northern tip of the marshlands between the Tigris and Euphrates. It had a population of about 340,000 in 2002 and about 420,000 in 2005 and in 2020 they are about 1,100,000 . Amarah is the seat of the Maysan Province. A major trading center for the surrounding agricultural area, the city is known for woven goods and silverware. The staple economic goods produced in northern Amarah are winter cereals such as wheat and barley, as well as animals such as sheep and horses. History The city was founded in the 1860s as an Ottoman military outpost from which the empire tried to control the warring Banu Lam and Al Bu Muhammad tribes. In 1915 Amarah was captured by the British. Before the revolution in 1958 Amarah was known for its feudal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Water Table
The water table is the upper surface of the zone of saturation. The zone of saturation is where the pores and fractures of the ground are saturated with water. It can also be simply explained as the depth below which the ground is saturated. The water table is the surface where the water pressure head is equal to the atmospheric pressure (where gauge pressure = 0). It may be visualized as the "surface" of the subsurface materials that are saturated with groundwater in a given vicinity. The groundwater may be from precipitation or from groundwater flowing into the aquifer. In areas with sufficient precipitation, water infiltrates through pore spaces in the soil, passing through the unsaturated zone. At increasing depths, water fills in more of the pore spaces in the soils, until a zone of saturation is reached. Below the water table, in the phreatic zone (zone of saturation), layers of permeable rock that yield groundwater are called aquifers. In less permeable soils, such as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Salt (chemistry)
In chemistry, a salt is a chemical compound consisting of an ionic assembly of positively charged cations and negatively charged anions, which results in a compound with no net electric charge. A common example is Salt, table salt, with positively charged sodium ions and negatively charged chloride ions. The component ions in a salt compound can be either inorganic compound, inorganic, such as chloride (Cl−), or organic chemistry, organic, such as acetate (). Each ion can be either monatomic ion, monatomic, such as fluoride (F−), or polyatomic ion, polyatomic, such as sulfate (). Types of salt Salts can be classified in a variety of ways. Salts that produce hydroxide ions when dissolved in water are called ''alkali salts'' and salts that produce hydrogen ions when dissolved in water are called ''acid salts''. ''Neutral salts'' are those salts that are neither acidic nor basic. Zwitterions contain an anionic and a cationic centre in the same molecule, but are not considered s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Irrigation
Irrigation (also referred to as watering) is the practice of applying controlled amounts of water to land to help grow crops, landscape plants, and lawns. Irrigation has been a key aspect of agriculture for over 5,000 years and has been developed by many cultures around the world. Irrigation helps to grow crops, maintain landscapes, and revegetate disturbed soils in dry areas and during times of below-average rainfall. In addition to these uses, irrigation is also employed to protect crops from frost, suppress weed growth in grain fields, and prevent soil consolidation. It is also used to cool livestock, reduce dust, dispose of sewage, and support mining operations. Drainage, which involves the removal of surface and sub-surface water from a given location, is often studied in conjunction with irrigation. There are several methods of irrigation that differ in how water is supplied to plants. Surface irrigation, also known as gravity irrigation, is the oldest form of irr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Silt
Silt is granular material of a size between sand and clay and composed mostly of broken grains of quartz. Silt may occur as a soil (often mixed with sand or clay) or as sediment mixed in suspension with water. Silt usually has a floury feel when dry, and lacks plasticity when wet. Silt also can be felt by the tongue as granular when placed on the front teeth (even when mixed with clay particles). Silt is a common material, making up 45% of average modern mud. It is found in many river deltas and as wind-deposited accumulations, particularly in central Asia, north China, and North America. It is produced in both very hot climates (through such processes as collisions of quartz grains in dust storms) and very cold climates (through such processes as glacial grinding of quartz grains.) Loess is soil rich in silt which makes up some of the most fertile agricultural land on Earth. However, silt is very vulnerable to erosion, and it has poor mechanical properties, making constr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lake Hammar
Lake Hammar ( ar, هور الحمّار, ) is a saline lake in southeastern part of Iraq within the Hammar Marshes. It has an area of 600–1,350 km2. Water level in the lake fluctuates, with maximum depths varying from 1.8 metres (winter) to 3.0 metres (spring). The lake is an important wetland site for birds. The native inhabitants are Marsh Arabs, some of whom occupy villages on artificial, floating islands. Hammar Lacus, a feature on Titan, the moon of Saturn Saturn is the sixth planet from the Sun and the second-largest in the Solar System, after Jupiter. It is a gas giant with an average radius of about nine and a half times that of Earth. It has only one-eighth the average density of Earth; h ..., is named after Hammar Lake. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Al Qurnah
Al-Qurnah (Kurnah or Qurna, meaning connection/joint in Arabic) is a town in southern Iraq about 74 km northwest of Basra, that lies within the conglomeration of Nahairat. Qurna is located at the confluence point of the Tigris and Euphrates rivers to form the Shatt al-Arab waterway. Local folklore holds Qurnah to have been the original site of biblical paradise, the Garden of Eden and location of the Tree of Knowledge. History Local folklore holds Qurnah to have been the site of the Garden of Eden and the location of a city built by general Seleucus Nicator I. An ancient tree is celebrated locally and shown to the tourists as the actual Tree of Knowledge of the Bible. The tree died some time ago and replacement trees were planted. The tomb of Ezra is also described to be nearby and found further upstream on the river Tigris. In 1855, Al Qurnah was the site of the Qurnah Disaster, in which local tribes attacked and sank a convoy of a ship and rafts carrying 240 cases of an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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