Misplaced Pages

#847152

33-503: Its capital is Ibb , which, along with Jibla , are extremely significant historic cities. The province contains many attractions in districts such as Yareem, Ba'dan and Al-Sabrah. Ibb is located on the southwestern side of the escarpment of the Yemen Highlands , with dramatic drops to Ta'izz city and the Tihama coastline. There are also impressive views of 3,070 metre high Jabal Sabir to

66-533: A 10 m high section to cross a 300 m wide valley, to carry water to their capital city, Nineveh . Although particularly associated with the Romans , aqueducts were likely first used by the Minoans around 2000 BCE. The Minoans had developed what was then an extremely advanced irrigation system , including several aqueducts. The Indian subcontinent is believed to have some of the earliest aqueducts. Evidence can be found at

99-520: A distinctive feature of Roman aqueducts and hence the term aqueduct is often applied specifically to a bridge for carrying water . Near the Peruvian town of Nazca, an ancient pre-Columbian system of aqueducts called puquios were built and are still in use today. They were made of intricately placed stones, a construction material widely used by the Nazca culture. The time period in which they were constructed

132-556: A dry land environment. In Persia , starting around 3000 years ago a system of underground aqueducts called qanāts were constructed, a series of well-like vertical shafts, connected by gently sloping tunnels. This technique: Throughout Petra , Jordan, the Nabataean engineers took advantage of every natural spring and every winter downpour to channel water where it was needed. They constructed aqueducts and piping systems that allowed water to flow across mountains, through gorges and into

165-534: A fragment remains in Mexico City today. Extensive usage of elaborate aqueducts have been found to have been used in ancient Sri Lanka . The best example is the Yoda Ela or Jaya Ganga, an 87 kilometres (54 mi) long water canal carrying excess water between two artificial reservoirs with a gradient of 10 to 20 cm per kilometer during the fifth century AD. However, the ancient engineering methods in calculating

198-562: A market town and the Ottomans established the Wednesday market in Ibb. Ibb was governed by a semi-autonomous emir until 1944, when the emirate was abolished. At times in its history many people have migrated to Ibb from areas of Yemen experiencing drought, to find work in farming. In the mid-1950s there was reportedly an outbreak of smallpox in the city. German explorer Hermann Burchardt photographed

231-508: A source such as a river, spring, reservoir, qanat , or aqueduct for domestic consumption or agricultural irrigation of crop land uses. Rills were traditionally used in Middle Eastern and Mediterranean climate cultures of ancient and historical eras; and other climates and continents worldwide. They are distinguished from a 'water ditch ' by being lined to reduce absorption losses and to increase durability. The Falaj irrigation system at

264-635: A third is from the Colorado River. In modern civil engineering projects, detailed study and analysis of open-channel flow is commonly required to support flood control, irrigation systems, and large water supply systems when an aqueduct rather than a pipeline is the preferred solution. In the past, aqueducts often had channels made of earth or other porous materials but significant amounts of water are lost through such unlined aqueducts. As water gets increasingly scarce, these canals are being lined with concrete, polymers , or impermeable soil. In some cases,

297-503: A thousand years. Roman aqueducts were built in all parts of the Roman Empire , from Germany to Africa, and especially in the city of Rome, where they totalled over 415 kilometres (258 mi). The aqueducts supplied fresh water to public baths and for drinking water, in large cities across the empire, and set a standard of engineering that was not surpassed for more than a thousand years. Bridges, built in stone with multiple arches, were

330-511: 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 a bridge carrying an artificial watercourse . Aqueducts were used in ancient Greece , the ancient Near East , ancient Rome , ancient Aztec , and ancient Inca . The simplest aqueducts are small ditches cut into

363-646: Is called a qanat. One historic example found in Syria, the Qanat Firaun, extends over 100 kilometers. Modern aqueducts may also make extensive use of pipelines. Pipelines are useful for transporting water over long distances when it needs to move over hills, or where open channels are poor choices due to considerations of evaporation , freezing, pollution, or environmental impact. They can also be used to carry treated water . Historically, agricultural societies have constructed aqueducts to irrigate crops. Archimedes invented

SECTION 10

#1732852649848

396-570: Is dwarfed by aqueducts in the far west of the country, most notably the 242-mile (389-km) Colorado River Aqueduct , which supplies the Los Angeles area with water from the Colorado River nearly 250 miles to the east and the 701.5-mile (1,129.0 km) California Aqueduct , which runs from the Sacramento-San Joaquin River Delta to Lake Perris . The Central Arizona Project is the largest and most expensive aqueduct constructed in

429-402: Is little rain from November to February, but for the rest of the year there is probably at least 100mm (4 inches) of rain per month. Temperatures are warm, averaging about 30 °C (86 °F) in the day but nights are quite cool. Because of its abundant rainfall, Ibb is known as "the fertile province". Almost the whole area of the governorate outside urban centres is cultivated despite

462-560: Is noted for its towering stone houses, with geometrical friezes and circular stained glass windows known as qamiriya . The main mosque was built during the Ottoman period, and there are other mosques and also a fortress in the vicinity, closed to visitors. An ancient overhead aqueduct still remains. Ibb University was established in 1996. The main football team is Al Sha'ab Ibb . [REDACTED] Media related to Ibb at Wikimedia Commons Aqueduct (water supply) An aqueduct

495-468: Is still debated, but some evidence supports circa A.D. 540–552, in response to drought periods in the region. The Guayabo National Monument of Costa Rica, a park covering the largest archaeological site in the country, contains a system of aqueducts. The complex network of uncovered and covered aqueducts still functions well. The aqueducts are constructed from rounded river stones, which are mostly made of volcanic rock . The civilization that constructed

528-664: The Al Ain Oasis , in present-day Abu Dhabi Emirate , uses rills as part of its qanat water system. Sometimes in the Spanish language they are called Acequias . Rills are also used for aesthetic purposes in landscape design. Rills are used as narrow channels of water inset into the pavement of a garden , as linear water features , and often tiled and part of a fountain design. The historical origins are from paradise garden religious images that first translated into ancient Persian Gardens . Rills were later exceptionally developed in

561-911: The Moorish (Spanish) Gardens of Al-andalus , such as at the Alhambra in Granada ; and also in other Islamic gardens, cultures, and countries. Early 20th century examples are in the María Luisa Park gardens in Seville, Spain; and at the Casa del Herrero gardens in Montecito, California . Aqueducts sometimes run for some or all of their path through tunnels constructed underground. A version of this common in North Africa and Central Asia that has vertical wells at regular intervals

594-467: The Ottoman Empire , it is one of the most important medium-sized cities in the country. It is situated on a mountain ridge, surrounded by fertile land. As of 2023, it has an estimated population of 771,500 residents. Other names for Ibb, is "The Land of Green" Ibb has been occupied since ancient times, and due to its strategic importance, the Ottomans used it as an administrative center. It thrived as

627-658: The South–North Water Transfer Project aims to connect the Yangtze River basin to Beijing through three separate systems. The project will reuse part of the Grand Canal of China . The simplest aqueducts are small ditches cut into the earth. Much larger channels may be used in modern aqueducts, for instance the Central Arizona Project uses 7.3 m (24 ft) wide channels. A major factor in

660-518: The water screw to raise water for use in irrigation of croplands. Another use for aqueducts is to supply large cities with drinking water. They also help drought-prone areas with water supply . Some of the Roman aqueducts still supply water to Rome today. In California , United States, three large aqueducts supply water over hundreds of miles to the Los Angeles area. Two are from the Owens River area, and

693-674: The Romans, aqueducts were devised much earlier in Greece, the Near East , Nile Valley , and Indian subcontinent , where peoples such as the Egyptians and Harappans built sophisticated irrigation systems. The Aztecs and Incans also built such systems independently later. Roman-style aqueducts were used as early as the 7th century BC, when the Assyrians built an 80 km long limestone aqueduct, which included

SECTION 20

#1732852649848

726-810: The United States. It stretches 336 miles from its source near Parker, Arizona to the metropolitan areas of Phoenix and Tucson . An aqueduct in New Zealand, "the Oamaru Borough Race", was constructed in the late 19th century to deliver water (and water-power) about 50 km from the Waitaki River at Kurow to the coastal town of Oamaru . In Spain, the Tagus-Segura Water Transfer system of aqueducts opened in 1979 and transports water 286 kilometres (178 mi) from north to south. In China,

759-595: The aqueduct system remains a mystery to archaeologists; it is suspected that Guayabo's aqueducts sat at a point of ancient cultural confluence between Aztecs, Mayans, and Incas. When Europeans saw the Aztec capital Tenochtitlan , early in the 16th century, the city was watered by two aqueducts. One of these, Chapultepec aqueduct , built c.  1420 , was rebuilt by the Spanish almost three hundred years later. Originally tracing part of its path over now-gone Lake Texcoco , only

792-467: The city in 1901; these photos are now held at the Ethnological Museum of Berlin . Ibb is located at an altitude of 2,050 metres (6,730 ft) on a spur of Mount Shamāḥī. Due to its high altitude, Ibb has a dry-winter humid subtropical climate ( Köppen climate classification : Cwa ), and is one of the wettest areas of Yemen, typically receiving around 500 mm of rain per annum. The city

825-493: The design of all open channels is its gradient. A higher gradient allows a smaller channel to carry the same amount of water as a larger channel with a lower gradient, but increases the potential of the water to damage the aqueduct's structure. A typical Roman aqueduct had a gradient of about 1:4800. A constructed functional rill is a small canal or aqueduct of stone, brick, concrete, or other lining material, usually rectilinear in cross section , for water transportation from

858-528: 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. The word aqueduct is derived from the Latin words aqua ( water ) and ductus ( led or guided ). Although particularly associated with

891-430: The exact elevation between the two reservoirs and the exact gradient of the canal to such fine precision had been lost with the fall of the civilization in 13th Century. Modern aqueducts are a central part of many countries' water distribution infrastructure. The United States' aqueducts are some of the world's largest. The Catskill Aqueduct carries water to New York City over a distance of 120 miles (190 km), but

924-532: The rain during the winter. Ibb Governorate is divided into the following 20 districts. These districts are further divided into sub-districts, and then further subdivided into villages: Ibb Ibb ( Arabic : إِبّ , romanized :  ʾIbb ) is a city in Yemen , the capital of Ibb Governorate , located about 117 km (73 mi) northeast of Mocha and 194 km (121 mi) south of Sana'a . A market town and administrative centre developed during

957-622: The sites of present-day Hampi, Karnataka . The massive aqueducts near Tungabhadra River supplying irrigation water were once 15 miles (24 km) long. The waterways supplied water to royal bath tubs. In Oman from the Iron Age , in Salut, Bat, and other sites, a system of underground aqueducts called falaj or qanāts were constructed, a series of well-like vertical shafts, connected by gently sloping horizontal tunnels. There are three types of falaj: These enabled large scale agriculture to flourish in

990-474: The south. Owing to the way in which it captures the upper-level southwestern monsoonal flow during the months from April to October, Ibb governorate is the wettest place in Arabia . Though meteorological data are exceedingly poor and of questionable accuracy, the annual precipitation is probably more than 1,000 mm (40 inches) and some estimate suggest it could be as high as 1,500mm (60 inches). There

1023-518: The steep terrain, and the number of crops produced is extraordinarily large for so small an area. Qat is particularly important, but wheat , barley , sesame and sorghum are the major sources of food for most people outside Ibb city. Sophisticated systems for management and storage of water from the seasonal rains allows extra crops to be grown during the dry season. This sophisticated agriculture allows Ibb to support an extremely dense rural population, with densities of up to 500 people/km² common in

Ibb Governorate - Misplaced Pages Continue

1056-536: The temples, homes, and gardens of Petra's citizens. Walking through the Siq , one can easily spot the remains of channels that directed water to the city center, as well as durable retention dams that kept powerful flood waters at bay. On the island of Samos , the Tunnel of Eupalinos was built during the reign of Polycrates (538–522 BC). It is considered an underground aqueduct and brought fresh water to Pythagoreion for roughly

1089-406: The wettest areas. In recent years, Ibb governorate has been the scene of numerous sit-ins in protest at government policies: many of the most significant anti-government protesters since 1999 have been natives of Ibb and surrounding areas. Ibb province contains green calchol and mountainous highlands. It is also characterized by a mild climate in different days of the year and large quantities of

#847152