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Qanat
A qanāt () or kārīz () is a water supply system that was developed in ancient Iran for the purpose of transporting usable water to the surface from an aquifer or a well through an underground aqueduct. Originating approximately 3,000 years ago, its function is essentially the same across the Middle East and North Africa, but it is known by a variety of regional names beyond today's Iran, including: kārēz in Afghanistan and Pakistan; foggāra in Algeria; khettāra in Morocco; falaj in Oman and the United Arab Emirates; and ʿuyūn in Saudi Arabia. In addition to those in Iran, the largest extant and functional qanats are located in Afghanistan, Algeria, China (i.e., the Turpan water system), Oman, and Pakistan. Proving crucial to water supply in areas with hot and dry climates, a qanat enables water to be transported over long distances by largely eliminating the risk of much of it evaporating on the journey. The system also has the advantage of being fairly resistant to n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Qanat Kashan
A qanāt () or kārīz () is a water supply system that was developed in ancient Iran for the purpose of transporting usable water to the surface from an aquifer or a well through an underground aqueduct (water supply), aqueduct. Originating approximately 3,000 years ago, its function is essentially the same across the Middle East and North Africa, but it is known by a variety of regional names beyond today's Iran, including: kārēz in Afghanistan and Pakistan; foggāra in Algeria; khettāra in Morocco; falaj in Oman and the United Arab Emirates; and ʿuyūn in Saudi Arabia. In addition to those in Iran, the largest extant and functional qanats are located in Afghanistan, Algeria, China (i.e., the Turpan water system), Oman, and Pakistan. Proving crucial to water supply in areas with hot and dry climates, a qanat enables water to be transported over long distances by largely eliminating the risk of much of it evaporating on the journey. The system also has the advantage of being ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Turpan Water System
The Turpan water system, also called the Turfan kārēz system, is used for water supply via a vertical tunnel in the Turpan Depression of Xinjiang, China. "Karez" () is a word in the local Uyghur language that is derived from the word in the Persian language for the system from which it is derived: the 3000-year-old qanāt. Turpan has the Turpan Karez Paradise (a Protected Area of the People's Republic of China), which is dedicated to demonstrating its karez water system, as well as exhibiting other historical artifacts. Turpan's karez well system was crucial in Turpan's development as an important oasis stopover on the Silk Road, which skirted the barren and hostile Taklamakan Desert. Description Turpan's karez water system is made up of a horizontal series of vertically dug wells that are then linked by underground water canals to collect water from the watershed surface runoff from the base of the Tian Shan Mountains and the nearby Flaming Mountains. The canals ch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aqueduct (water Supply)
An aqueduct is a watercourse constructed to carry water from a source to a distribution point far away. In modern engineering, the term ''aqueduct'' is used for any system of pipes, ditches, canals, tunnels, and other structures used for this purpose. The term ''aqueduct'' also often refers specifically to aqueduct (bridge), a bridge carrying an artificial watercourse. Aqueducts were used in ancient Greece, the ancient Near East, Roman aqueduct, ancient Rome, Chapultepec aqueduct, ancient Aztec, and Inca aqueducts, ancient Inca. The simplest aqueducts are small ditches cut into the earth. Much larger channels may be used in modern aqueducts. Aqueducts sometimes run for some or all of their path through tunnels constructed underground. Modern aqueducts may also use pipelines. Historically, agricultural societies have constructed aqueducts to irrigate crops and supply large cities with drinking water. Etymology The word ''aqueduct'' is derived from the Latin words (''water'') a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United Arab Emirates
The United Arab Emirates (UAE), or simply the Emirates, is a country in West Asia, in the Middle East, at the eastern end of the Arabian Peninsula. It is a Federal monarchy, federal elective monarchy made up of Emirates of the United Arab Emirates, seven emirates, with Abu Dhabi serving as its capital. It shares land borders with Oman to the east and northeast, and with Saudi Arabia to the southwest; as well as maritime borders in the Persian Gulf with Qatar and Iran, and with Oman in the Gulf of Oman. , the UAE has an estimated population of over 10 million, of which 11% are Emiratis; Dubai is List of cities in the United Arab Emirates, its most populous city and is an international hub. Islam is the State religion, official religion and Arabic is the official language, while English is the most spoken language and the language of business. The United Arab Emirates Oil reserves in the United Arab Emirates, oil and natural gas reserves are the world's List of countries by pr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Semi-arid Climate
A semi-arid climate, semi-desert climate, or steppe climate is a dry climate sub-type. It is located on regions that receive precipitation below potential evapotranspiration, but not as low as a desert climate. There are different kinds of semi-arid climates, depending on variables such as temperature, and they give rise to different biomes. Defining attributes of semi-arid climates A more precise definition is given by the Köppen climate classification, which treats steppe climates (''BSh'' and ''BSk'') as intermediates between desert climates (BW) and humid climates (A, C, D) in ecological characteristics and agricultural potential. Semi-arid climates tend to support short, thorny or scrubby vegetation and are usually dominated by either grasses or shrubs as they usually cannot support forests. To determine if a location has a semi-arid climate, the precipitation threshold must first be determined. The method used to find the precipitation threshold (in millimeters): * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arid Climate
The desert climate or arid climate (in the Köppen climate classification ''BWh'' and ''BWk'') is a dry climate sub-type in which there is a severe excess of evaporation over precipitation. The typically bald, rocky, or sandy surfaces in desert climates are dry and hold little moisture, quickly evaporating the already little rainfall they receive. Covering 14.2% of Earth's land area, hot deserts are the second-most common type of climate on Earth after the Polar climate. There are two variations of a desert climate according to the Köppen climate classification: a hot desert climate (''BWh''), and a cold desert climate (''BWk''). To delineate "hot desert climates" from "cold desert climates", a mean annual temperature of is used as an isotherm so that a location with a ''BW'' type climate with the appropriate temperature above this isotherm is classified as "hot arid subtype" (''BWh''), and a location with the appropriate temperature below the isotherm is classified as "cold a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Daylighting (streams)
Daylighting is the opening up and restoration of a previously buried watercourse, one which had at some point been diverted below ground. Typically, the rationale behind returning the riparian environment of a stream, wash, or river to a more natural above-ground state is to reduce runoff, create habitat for species in need of it, or improve an area's aesthetics. In the United Kingdom, the practice is also known as deculverting. In addition to its use in urban design and urban planning, planning the term also refers to the public process of advancing such projects. According to the Planning and Development Department of the City of Berkeley, "A general consensus has developed that protecting and restoring natural creeks' functions is achievable over time in an urban environment while recognizing the importance of property rights." Systems Natural drainage systems Natural drainage systems help Stormwater#Stormwater management, manage stormwater by Infiltration (hydrology), infil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Water Pumping
The pumping of water is a basic and practical technique, far more practical than scooping it up with one's hands or lifting it in a hand-held bucket. This is true whether the water is drawn from a Purified water, fresh source, moved to a needed location, water purification, purified, or used for irrigation, washing, or sewage treatment, or for evacuating water from an undesirable location. Regardless of the outcome, the energy required to pump water is an extremely demanding component of water footprint, water consumption. All other processes depend or benefit either from water descending from a higher elevation or some pressurized plumbing system. The ancient concept of the aqueduct (water supply), aqueduct took simple and eloquent advantage of maintaining elevation of water for as long and far a distance as possible. Thus, as water moves over great distances, it retains a larger component of its potential energy by spending small portions of this energy flowing down a slight grad ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Groundwater
Groundwater is the water present beneath Earth's surface in rock and Pore space in soil, soil pore spaces and in the fractures of stratum, rock formations. About 30 percent of all readily available fresh water 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''. Groundwater is Groundwater recharge, recharged from the surface; it may discharge from the surface naturally at spring (hydrosphere), springs and Seep (hydrology), seeps, and can form oasis, oases or wetlands. Groundwater is also often withdrawn for agricultural, municipal, and industrial use by constructing and operating extraction water well, wells. The study of the distribution and movement of groundwater is ''hydrogeology'', also called groundwater hydrology. Typically, groundwater is thought o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Water Supply Terrorism
Water supply terrorism involves acts of sabotage to a water supply system, through chemical or biological warfare or infrastructural sabotage. Throughout military history and the history of terrorism, water supply attacks have been perpetrated by political groups, intending to scare, cause death, or drought. Chemical and biological attacks Examples In 1984, members of the Rajneeshee religious cult contaminated a city water supply tank in The Dalles, Oregon, United States, using Salmonella and infected 750 people. In 1992, the Kurdistan Workers' Party (PKK) put lethal concentrations of potassium cyanide in the water tanks of a Turkish Air Force compound in Istanbul. In 2000, workers at the Cellatex chemical plant in northern France dumped 5000 liters of sulfuric acid into a tributary of the Meuse River when they were denied workers' benefits. In 2000, Queensland, Australia, police arrested a man for using a computer and a radio transmitter to take control of the Maroochy Shire ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Effects Of War
The effects of war are widely spread and can be long-term or short-term. Soldiers experience war differently than civilians. Although both suffer in times of war, women and children suffer atrocities in particular. In the past decade, up to two million of those killed in armed conflicts were children. The widespread trauma caused by these atrocities and suffering of the civilian population is another legacy of these conflicts, the following creates extensive emotional and psychological stress. Present-day internal wars generally take a larger toll on civilians than state wars. This is due to the increasing trend where combatants have made targeting civilians a strategic objective. A state conflict is an armed conflict that occurs with the use of armed force between two parties, of which one is the government of a state. "The three problems posed by state conflict are the willingness of UN members, particularly the strongest member, to intervene; the structural ability of the UN ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Man-made Disasters
A disaster is an event that causes serious harm to people, buildings, economies, or the environment, and the affected community cannot handle it alone. ''Natural disasters'' like avalanches, floods, earthquakes, and wildfires are caused by natural hazards. ''Human-made disasters'' like oil spills, terrorist attacks and power outages are caused by people. Nowadays, it is hard to separate natural and human-made disasters because human actions can make natural disasters worse. Climate change also affects how often disasters due to extreme weather hazards happen. Disasters usually hit people in developing countries harder than people in wealthy countries. Over 95% of deaths from disasters happen in low-income countries, and those countries lose a lot more money compared to richer countries. For example, the damage from natural disasters is 20 times greater in developing countries than in industrialized countries. This is because low-income countries often do not have well-built bui ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
