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Dukan Dam
The Dukan Dam (Sorani Kurdish: بەنداوی دووکان Arabic: سد دوكان) is a multi-purpose concrete arch dam in As Sulaymaniyah Governorate, Kurdistan Region of Iraq. It impounds the Little Zab, thereby creating Lake Dukan. The Dukan Dam was built between 1954 and 1959 whereas its power station became fully operational in 1979. The dam is long and high and its hydroelectric power station has a maximum capacity of 400 MW. Project history The Dukan Dam was built between 1954 and 1959 as a multi-purpose dam to provide water storage, irrigation and hydroelectricity. The design for the dam was carried out by the British engineering company Binnie & Partners (with Partner and third generation Binnie engineer Geoffrey Binnie the key engineer). Additional structural analysis was done for Binnie by his friends at Imperial College, Professor Pippard and Letitia Chitty, who "developed a stress analysis technique using relaxation methods and a rubber model to verify the des ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Little Zab
The Little Zab or Lower Zab (, ''al-Zāb al-Asfal''; or '; , ''Zâb-e Kuchak''; , ''Zāba Taḥtāya'') is a river that originates in Iran and joins the Tigris just south of Al Zab in the Kurdistan region of Iraq. It is approximately long and drains an area of about . The river is fed by rainfall and snowmelt, resulting in a peak discharge in spring and low water in summer and early fall. Two dams have been built on the Little Zab, regulating the river flow, providing water for irrigation and generating hydroelectricity. The Zagros Mountains have been occupied since at least the Lower Palaeolithic, but the earliest archaeological site in the Little Zab basin, Barda Balka, dates to the Middle Palaeolithic. Human occupation of the Little Zab basin has been attested for every period since then. Course The Little Zab rises in the Zagros Mountains in Iran at an elevation of circa amsl. In its upper reaches, the course of the Little Zab is determined by the alignment of the major m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Archaeological Field Survey
In archaeology, survey or field survey is a type of field research by which archaeologists (often landscape archaeologists) search for archaeological sites and collect information about the location, distribution and organization of past human cultures across a large area (e.g. typically in excess of one hectare, and often in excess of many km2). Archaeologists conduct surveys to search for particular archaeological sites or kinds of sites, to detect patterns in the distribution of material culture over regions, to make generalizations or test hypotheses about past cultures, and to assess the risks that development projects will have adverse impacts on archaeological heritage. The surveys may be: (a) ''intrusive'' or ''non-intrusive'', depending on the needs of the survey team (and the risk of destroying archaeological evidence if intrusive methods are used) and; (b) ''extensive'' or ''intensive'', depending on the types of research questions being asked of the landscape in quest ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dams In Iraq
The following is a list of dams and reservoirs in Iraq. They are sorted according to their location in either the Euphrates or the Tigris river basin. Dams in the Euphrates basin *Duban Regulator, on the Euphrates, regulating the flow of the Euphrates into Lake Habbaniyah * Fallujah Barrage, on the Euphrates *Haditha Dam, on the Euphrates, creating Lake Qadisiyah *Hindiya Barrage, on the Hindiya branch of the Euphrates *Ramadi Barrage, on the Euphrates *Warrar Regulator, on the Euphrates *Three dams in Wadi Hauran (Hussayniyah dam, Rutba dam, and the Hauran dam) Dams in the Tigris basin *Adhaim Dam, on the Adhaim River *Alwand Dam, on the Alwand River * Badush Dam (incomplete), on the Tigris *Bastora Dam (under construction), on the Bastora River *Bawanur Dam (under construction), on the Diyala River *Beduhe Dam, on the Beduhe River *Bekhme Dam (incomplete), on the Great Zab *Darbandikhan Dam, on the Diyala River *Deralok Dam (under construction), on the Great Zab * Dibis Dam, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Dams And Reservoirs In Iraq
The following is a list of dams and reservoirs in Iraq. They are sorted according to their location in either the Euphrates or the Tigris river basin. Dams in the Euphrates basin *Duban Regulator, on the Euphrates, regulating the flow of the Euphrates into Lake Habbaniyah *Fallujah Barrage, on the Euphrates *Haditha Dam, on the Euphrates, creating Lake Qadisiyah *Hindiya Barrage, on the Hindiya branch of the Euphrates *Ramadi Barrage, on the Euphrates *Warrar Regulator, on the Euphrates *Three dams in Wadi Hauran (Hussayniyah dam, Rutba dam, and the Hauran dam) Dams in the Tigris basin *Adhaim Dam, on the Adhaim River *Alwand Dam, on the Alwand River *Badush Dam (incomplete), on the Tigris *Bastora Dam (under construction), on the Bastora River *Bawanur Dam (under construction), on the Diyala River *Beduhe Dam, on the Beduhe River *Bekhme Dam (incomplete), on the Great Zab *Darbandikhan Dam, on the Diyala River *Deralok Dam (under construction), on the Great Zab * Dibis Dam, on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Francis Turbine
The Francis turbine is a type of water turbine. It is an inward-flow reaction turbine that combines radial and axial flow concepts. Francis turbines are the most common water turbine in use today, and can achieve over 95% efficiency. The process of arriving at the modern Francis runner design took from 1848 to approximately 1920. It became known as the Francis turbine around 1920, being named after British-American engineer James B. Francis who in 1848 created a new turbine design. Francis turbines are primarily used for producing electricity. The power output of the electric generators generally ranges from just a few kilowatts up to 1000 MW, though mini-hydro installations may be lower. The best performance is seen when the head height is between . Penstock diameters are between . The speeds of different turbine units range from 70 to 1000 rpm. A wicket gate around the outside of the turbine's rotating runner controls the rate of water flow through the turbine for d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spillway
A spillway is a structure used to provide the controlled release of water downstream from a dam or levee, typically into the riverbed of the dammed river itself. In the United Kingdom, they may be known as overflow channels. Spillways ensure that water does not damage parts of the structure not designed to convey water. Spillways can include floodgates and fuse plugs to regulate water flow and reservoir level. Such features enable a spillway to regulate downstream flow—by releasing water in a controlled manner before the reservoir is full, operators can prevent an unacceptably large release later. Other uses of the term "spillway" include bypasses of dams and outlets of channels used during high water, and outlet channels carved through natural dams such as moraines. Water normally flows over a spillway only during flood periods, when the reservoir has reached its capacity and water continues entering faster than it can be released. In contrast, an intake tower is a structure ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Discharge (hydrology)
In hydrology, discharge is the volumetric flow rate of water that is transported through a given cross-sectional area. It includes any suspended solids (e.g. sediment), dissolved chemicals (e.g. CaCO3(aq)), or biologic material (e.g. diatoms) in addition to the water itself. Terms may vary between disciplines. For example, a fluvial hydrologist studying natural river systems may define discharge as streamflow, whereas an engineer operating a reservoir system may equate it with outflow, contrasted with inflow. Theory and calculation A discharge is a measure of the quantity of any fluid flow over unit time. The quantity may be either volume or mass. Thus the water discharge of a tap (faucet) can be measured with a measuring jug and a stopwatch. Here the discharge might be 1 litre per 15 seconds, equivalent to 67 ml/second or 4 litres/minute. This is an average measure. For measuring the discharge of a river we need a different method and the most common is the 'area-velocity' method. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Darbandikhan Dam
The Darbandikhan Dam ( ku, Bendava Derbendîxanê ,بەنداوی دەربەندیخان) is a multi-purpose embankment dam on the Diyala River in northern Sulaymaniyah Governorate, Iraq. It was constructed between 1956 and 1961. The purpose of the dam is irrigation, flood control, hydroelectric power production and recreation. Due to poor construction and neglect, the dam and its 249 MW power station have undergone several repairs over the years. A rehabilitation of the power station began in 2007 and was completed in 2013. Background After the Harza Engineering Company of USA designed the dam, construction began in 1956. The reservoir began to fill in November 1961 and the dam was complete that same year. After the reservoir filled, several problems occurred. In 1967, there was a major slope failure about upstream of the dam. This and other slope failures are continually under repair. The bedrock beneath the dam has to be re-grouted and the crest of the dam settled too much, r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
World Bank
The World Bank is an international financial institution that provides loans and grants to the governments of low- and middle-income countries for the purpose of pursuing capital projects. The World Bank is the collective name for the International Bank for Reconstruction and Development (IBRD) and International Development Association (IDA), two of five international organizations owned by the World Bank Group. It was established along with the International Monetary Fund at the 1944 Bretton Woods Conference. After a slow start, its first loan was to France in 1947. In the 1970s, it focused on loans to developing world countries, shifting away from that mission in the 1980s. For the last 30 years, it has included NGOs and environmental groups in its loan portfolio. Its loan strategy is influenced by the Sustainable Development Goals as well as environmental and social safeguards. , the World Bank is run by a president and 25 executive directors, as well as 29 various vice ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydroproject
Hydroproject (russian: Институт «Гидропроект», Gidroproekt) is a Russian hydrotechnical design firm. Based in Moscow, it has a number of branches around the country. Its main activities are design of dams, hydroelectric stations, canals, sluices, etc. Hydroproject and its predecessor institutions have designed most of the hydroelectric dams and irrigation and navigation canals that have been built in the Soviet Union and Russia since the 1930s. They have designed a number of high-profile projects abroad as well, from India to Egypt to Canada. The institute, under Sergey Yakolevich Zhuk's leadership, also researched the Northern river reversal's potential. Furthermore, it has been involved in realising nuclear power plants in the Soviet Union between 1969 and 1986. History Hydroproject traces its history to the design departments of the Moscow Canal Construction Project (the 1930s), and the Hydroelectrostroy Trust (Трест “Гидроэлектрос ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clay Tablet
In the Ancient Near East, clay tablets (Akkadian ) were used as a writing medium, especially for writing in cuneiform, throughout the Bronze Age and well into the Iron Age. Cuneiform characters were imprinted on a wet clay tablet with a stylus often made of reed (reed pen). Once written upon, many tablets were dried in the sun or air, remaining fragile. Later, these unfired clay tablets could be soaked in water and recycled into new clean tablets. Other tablets, once written, were either deliberately fired in hot kilns, or inadvertently fired when buildings were burnt down by accident or during conflict, making them hard and durable. Collections of these clay documents made up the first archives. They were at the root of the first libraries. Tens of thousands of written tablets, including many fragments, have been found in the Middle East. Surviving tablet-based documents from the Minoan/ Mycenaean civilizations, are mainly those which were used for accounting. Tablets servin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
