HydraulicsHydraulics () is a technology and applied science using engineering, chemistry, and other sciences involving the mechanical properties and use of liquids. At a very basic level, hydraulics is the liquid counterpart of pneumatics, which concerns gases. Fluid mechanics provides the theoretical foundation for hydraulics, which focuses on applied engineering using the properties of fluids. In its fluid power applications, hydraulics is used for the generation, control, and transmission of power by the use of pressurized liquids.
IrrigationIrrigation (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.
MarrakeshMarrakesh or Marrakech (məˈrækɛʃ or ˌmærəˈkɛʃ; murrākuš, murraːkuʃ; ) is the fourth largest city in Morocco. It is one of the four Imperial cities of Morocco and the capital of the Marrakesh-Safi region. It is situated west of the foothills of the Atlas Mountains. The region has been inhabited by Berber farmers since Neolithic times. The city was founded in 1070 by Emir Abu Bakr ibn Umar as the imperial capital of the Almoravid Empire. The Almoravids established the first major structures in the city and shaped its layout for centuries to come.
History of IranThe history of Iran is intertwined with the history of a larger region known as Greater Iran, comprising the area from Anatolia in the west to the Indus river and the Syr Darya in the east, and from the Caucasus and the Eurasian Steppe in the north to the Persian Gulf and the Gulf of Oman in the south. Central to this area is Iran, commonly known until the mid-20th century as Persia in the Western world. Iran is home to one of the world's oldest continuous major civilizations, with historical and urban settlements dating back to 4000 BC.
GroundwaterGroundwater is the water present beneath Earth's surface in rock and soil pore spaces and in the fractures of rock formations. About 30 percent of all readily available freshwater in the world is groundwater. A unit of rock or an unconsolidated deposit is called an aquifer when it can yield a usable quantity of water. The depth at which soil pore spaces or fractures and voids in rock become completely saturated with water is called the water table.
