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83-497: Piazza Barberini is a large piazza in the centro storico or city center of Rome , Italy and situated on the Quirinal Hill . It was created in the 16th century but many of the surrounding buildings have subsequently been rebuilt. The square is on the site of the ancient circus of Flora, where floral games took place in May to celebrate springtime. The property was previously known as

166-548: A "square" has a wider meaning. There are public squares of the type described above but the term is also used for formal open spaces surrounded by houses with private gardens at the centre, sometimes known as garden squares . Most of these were built in the 18th and 19th centuries. In some cases the gardens are now open to the public. See the Squares in London category. Additionally, many public squares were created in towns and cities across

249-456: A caisson vertically below the top of the aquifer and then advancing lateral collectors out of the caisson and beneath the surface water body. Pumping from within the caisson induces infiltration of water from the surface water body into the aquifer, where it is collected by the collector well laterals and conveyed into the caisson where it can be pumped to the ground surface. Two additional broad classes of well types may be distinguished, based on

332-470: A circulation fluid to displace cuttings and cool bits during the drilling. Another form of rotary-style drilling, termed mud rotary , makes use of a specially made mud, or drilling fluid, which is constantly being altered during the drill so that it can consistently create enough hydraulic pressure to hold the side walls of the bore hole open, regardless of the presence of a casing in the well. Typically, boreholes drilled into solid rock are not cased until after

415-435: A confined space, it displaces oxygen, reducing oxygen concentration to a level low enough to pose a threat to humans and other aerobic organisms but still high enough for a risk of spontaneous or externally caused explosion. This potential for explosion is what poses such a danger in regards to the drilling and placement of water wells. Low levels of methane in drinking water are not considered toxic. When methane seeps into

498-975: A depth of 13 metres (43 ft). Other slightly younger wells are known from this site and from neighbouring Parekklisha-Shillourokambos. A first stone lined well of 5.5 metres (18 ft) depth is documented from a drowned final PPN (c. 7000 BC) site at ‘Atlit-Yam off the coast near modern Haifa in Israel . Wood-lined wells are known from the early Neolithic Linear Pottery culture , for example in Ostrov, Czech Republic, dated 5265 BC, Kückhoven (an outlying centre of Erkelenz ), dated 5300 BC, and Eythra in Schletz (an outlying centre of Asparn an der Zaya ) in Austria , dated 5200 BC. The neolithic Chinese discovered and made extensive use of deep drilled groundwater for drinking. The Chinese text The Book of Changes , originally

581-676: A divination text of the Western Zhou dynasty (1046 -771 BC), contains an entry describing how the ancient Chinese maintained their wells and protected their sources of water. A well excavated at the Hemedu excavation site was believed to have been built during the neolithic era. The well was cased by four rows of logs with a square frame attached to them at the top of the well. 60 additional tile wells southwest of Beijing are also believed to have been built around 600 BC for drinking and irrigation. In Egypt , shadoofs and sakias are used. The sakia

664-550: A drilling action. Unlike rotary drilling, cable tool drilling requires the drilling action to be stopped so that the bore hole can be bailed or emptied of drilled cuttings. Cable tool drilling rigs are rare as they tend to be 10x slower to drill through materials compared to similar diameter rotary air or rotary mud equipped rigs. Drilled wells are usually cased with a factory-made pipe, typically steel (in air rotary or cable tool drilling) or plastic / PVC (in mud rotary wells, also present in wells drilled into solid rock). The casing

747-743: A group of synthetic organofluorine chemical compounds that have multiple fluorine atoms attached to an alkyl chain. PFAS are a group of "forever chemicals" that spread very quickly and very far in ground water polluting it permanently. Water wells near certain airports where any form fire fighting or training activities occurred up to 2010 are likely to be contaminated by PFAS. A study concluded that of ~39 million groundwater wells 6-20% are at high risk of running dry if local groundwater levels decline by less than five meters, or – as with many areas and possibly more than half of major aquifers – continue to decline. Springs and wells have had cultural significance since prehistoric times, leading to

830-661: A marketplace but were built in front of large palaces or public buildings to emphasise their grandeur, as well as to accommodate military parades and ceremonies, among others (for example the Place Royale in Brussels and the Koningsplein in Amsterdam ). Palace squares are usually more symmetrical than their older market counterparts. In Russia, central square ( Russian : центра́льная пло́щадь , romanised : tsentráĺnaya plóshchad́ )

913-670: A particle in a proper noun. Like the Italian piazza and the Portuguese praça , the plaza remains a center of community life that is only equaled by the market-place. A plaza de toros is a bullring . Shopping centers may incorporate 'plaza' into their names, and plaza comercial is used in some countries as a synonym for centro comercial i.e. "shopping center". In the United Kingdom, and especially in London and Edinburgh ,

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996-472: A plaza can mean one of several things: Today's metropolitan landscapes often incorporate the plaza as a design element, or as an outcome of zoning regulations, building budgetary constraints, and the like. Sociologist William H. Whyte conducted an extensive study of plazas in New York City : his study humanized the way modern urban plazas are conceptualized, and helped usher in significant design changes in

1079-430: A pump. The water often comes from an aquifer or groundwater, and can be easily deepened, which may be necessary if the ground water level drops, by telescoping the lining further down into the aquifer. The yield of existing hand dug wells may be improved by deepening or introducing vertical tunnels or perforated pipes. Drawbacks to hand-dug wells are numerous. It can be impractical to hand dig wells in areas where hard rock

1162-433: A screening device, filter pack, slotted casing, or open bore hole is left to allow the flow of water into the well. Constructed screens are typically used in unconsolidated formations (sands, gravels, etc.), allowing water and a percentage of the formation to pass through the screen. Allowing some material to pass through creates a large area filter out of the rest of the formation, as the amount of material present to pass into

1245-406: A segmented steel drilling string, typically made up of 3m (10ft), 6 m (20 ft) to 8m (26ft) sections of steel tubing that are threaded together, with a bit or other drilling device at the bottom end. Some rotary drilling machines are designed to install (by driving or drilling) a steel casing into the well in conjunction with the drilling of the actual bore hole. Air and/or water is used as

1328-472: A statue of S.Antonio at the head. It was led by the oldest peasant to Piazza della Rotonda , where amid folk dancing, fresh strawberries were distributed to those present. In 1935 the Istituto Nazionale delle Assicurazioni (INA) bought the complex bounded by Piazza Barberini, Via Vittorio Veneto, Via dei Cappuccini (formerly Via Ferrea) and Via della Purificazione; but then had to fend off a purchase by

1411-420: A variety of tools including electro-seismic surveying, any available information from nearby wells, geologic maps, and sometimes geophysical imaging . These professionals provide advice that is almost as accurate a driller who has experience and knowledge of nearby wells/bores and the most suitable drilling technique based on the expected target depth. Shallow pumping wells can often supply drinking water at

1494-567: A very important source of potable water in some rural developing areas, where they are routinely dug and used today. Their indispensability has produced a number of literary references, literal and figurative, including the reference to the incident of Jesus meeting a woman at Jacob 's well ( John 4:6) in the Bible and the " Ding Dong Bell " nursery rhyme about a cat in a well. Hand-dug wells are excavations with diameters large enough to accommodate one or more people with shovels digging down to below

1577-608: A very low cost. However, impurities from the surface easily reach shallow sources, which leads to a greater risk of contamination for these wells compared to deeper wells. Contaminated wells can lead to the spread of various waterborne diseases . Dug and driven wells are relatively easy to contaminate; for instance, most dug wells are unreliable in the majority of the United States. Some research has found that, in cold regions, changes in river flow and flooding caused by extreme rainfall or snowmelt can degrade well water quality. Most of

1660-648: A water supply, it is commonly referred to as "methane migration". This can be caused by old natural gas wells near water well systems becoming abandoned and no longer monitored. Lately, however, the described wells/pumps are no longer very efficient and can be replaced by either handpumps or treadle pumps . Another alternative is the use of self-dug wells, electrical deep-well pumps (for higher depths). Appropriate technology organizations as Practical Action are now supplying information on how to build/set-up ( DIY ) handpumps and treadle pumps in practice. Per- and polyfluoroalkyl substances ( PFAS or PFASs ) are

1743-460: Is a back formation, since krásnaja (the term for "red") also means "beautiful" in archaic and poetic Russian, with many cities and towns throughout the region having locations with the name "Red Square." Gwanghwamun Plaza ( Korean : 광화문광장) also known as Gwanghwamun Square) is a public open space on Sejongno , Jongno-gu, Seoul, South Korea. It against the background of A Gwanghwamun Gate(Korean: 광화문). In 2009, Restoration of Gwanghwamun Gate made

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1826-654: Is a cognate of Italian piazza and French place (which has also been borrowed into English). The term is used across Spanish-speaking territories in Spain and the Americas, as well as in the Philippines . In addition to smaller plazas, the Plaza Mayor (sometimes called in the Americas as Plaza de Armas , "armament square" where troops could be mustered) of each center of administration held three closely related institutions:

1909-693: Is a common problem with groundwater. Nitrates from sewage , sewage sludge or fertilizer are a particular problem for babies and young children. Pollutant chemicals include pesticides and volatile organic compounds from gasoline , dry-cleaning , the fuel additive methyl tert-butyl ether (MTBE), and perchlorate from rocket fuel, airbag inflators, and other artificial and natural sources. Several minerals are also contaminants, including lead leached from brass fittings or old lead pipes, chromium VI from electroplating and other sources, naturally occurring arsenic , radon , and uranium —all of which can cause cancer—and naturally occurring fluoride , which

1992-464: Is a common term for an open area in the heart of the town . In a number of cities, the square has no individual name and is officially designated Central Square , for example Central Square (Tolyatti) . The most famous central square is the monumentally-proportioned Red Square which became a synecdoche for the Soviet Union during the 20th century; nevertheless, the association with "red communism"

2075-399: Is caused when the water table of the soil drops over time and salt begins to accumulate. In turn, the increased amount of salt begins to dry the soil out. The increased level of salt in the soil can result in the degradation of soil and can be very harmful to vegetation. Methane , an asphyxiant, is a chemical compound that is the main component of natural gas. When methane is introduced into

2158-437: Is constructed by welding, either chemically or thermally, segments of casing together. If the casing is installed during the drilling, most drills will drive the casing into the ground as the bore hole advances, while some newer machines will actually allow for the casing to be rotated and drilled into the formation in a similar manner as the bit advancing just below. PVC or plastic is typically solvent welded and then lowered into

2241-455: Is desirable in low quantities to prevent tooth decay , but can cause dental fluorosis in higher concentrations. Some chemicals are commonly present in water wells at levels that are not toxic, but can cause other problems. Calcium and magnesium cause what is known as hard water , which can precipitate and clog pipes or burn out water heaters. Iron and manganese can appear as dark flecks that stain clothing and plumbing, and can promote

2324-473: Is drilled to a predetermined depth or to a confining formation (clay or bedrock, for example), and then a smaller hole for the well is completed from that point forward. The well is typically cased from the surface down into the smaller hole with a casing that is the same diameter as that hole. The annular space between the large bore hole and the smaller casing is filled with bentonite clay , concrete, or other sealant material. This creates an impermeable seal from

2407-584: Is known in the Southwestern United States , is a common feature within the boundaries of the former provincial kingdom of Santa Fe de Nuevo México . They are a blend of Hispano and Pueblo design styles, several of which continue to be hubs for cities and towns in New Mexico , including Santa Fe Plaza , Old Town Albuquerque , Acoma Pueblo 's plaza, Taos Downtown Historic District , Mesilla Plaza , Mora , and Las Vegas Plaza . In U.S. English ,

2490-649: Is much more efficient, as it can bring up water from a depth of 10 metres (versus the 3 metres of the shadoof). The sakia is the Egyptian version of the noria . Some of the world's oldest known wells, located in Cyprus, date to 7000–8,500 BC. Two wells from the Neolithic period, around 6500 BC, have been discovered in Israel. One is in Atlit, on the northern coast of Israel, and the other is in

2573-477: Is often a well , monument , statue or other feature. Those with fountains are sometimes called fountain squares . The term "town square" (especially via the term "public square") is synonymous with the politics of many cultures, and the names of a certain town squares, such as the Euromaidan or Red Square , have become symbolic of specific political events throughout history. The city centre of Adelaide and

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2656-600: Is present, and they can be time-consuming to dig and line even in favourable areas. Because they exploit shallow aquifers, the well may be susceptible to yield fluctuations and possible contamination from surface water, including sewage. Hand dug well construction generally requires the use of a well trained construction team, and the capital investment for equipment such as concrete ring moulds, heavy lifting equipment, well shaft formwork, motorized de-watering pumps, and fuel can be large for people in developing countries. Construction of hand dug wells can be dangerous due to collapse of

2739-760: Is referred to as The Piazza. In the Low Countries , squares are often called "markets" because of their usage as marketplaces . Most towns and cities in Belgium and the southern part of the Netherlands have in their historical centre a Grote Markt (literally "Big Market") in Dutch or Grand-Place (literally "Grand Square") in French (for example the Grand-Place in Brussels and

2822-477: Is simply hammered into the ground, usually with a tripod and driver , with pipe sections added as needed. A driver is a weighted pipe that slides over the pipe being driven and is repeatedly dropped on it. When groundwater is encountered, the well is washed of sediment and a pump installed. Drilled wells are constructed using various types of drilling machines, such as top-head rotary, table rotary, or cable tool, which all use drilling stems that rotate to cut into

2905-697: The Grote Markt in Antwerp ). The Grote Markt or Grand-Place is often the location of the town hall , hence also the political centre of the town. The Dutch word for square is plein , which is another common name for squares in Dutch-speaking regions (for example Het Plein in The Hague ). In the 17th and 18th centuries, another type of square emerged, the so-called royal square (French: Place royale , Dutch: Koningsplein ). Such squares did not serve as

2988-560: The Cairo Citadel at 280 feet (85 m) deep and the Pozzo di San Patrizio (St. Patrick's Well) built in 1527 in Orvieto, Italy , at 61 metres (200 ft) deep by 13 metres (43 ft) wide are both larger by volume. Driven wells may be very simply created in unconsolidated material with a well hole structure , which consists of a hardened drive point and a screen (perforated pipe). The point

3071-616: The Fontana delle Api (1644), also by Bernini is in the nearby Via Vittorio Veneto but it has been reconstructed somewhat arbitrarily following its removal from its previous position on the corner of a palace where the Piazza Barberini meets the Via Sistina. Until the 18th century, the piazza was one of the locations where unidentified corpses were displayed for the public to identify. Between 1632 and 1822 an antique obelisk stood here. It

3154-569: The Giornale d’Italia , backed by the minister for the Press and Propaganda. Today, the piazza is large crossroad for Rome's traffic and, since 1980, has accommodated a station on Line A of the Rome Metro , called Barberini – Fontana di Trevi . [REDACTED] [REDACTED] . Piazza A town square (also a plaza , public square or urban square ) is an open public space commonly found in

3237-508: The bacteria , viruses , parasites , and fungi that contaminate well water comes from fecal material from humans and other animals. Common bacterial contaminants include E. coli , Salmonella , Shigella , and Campylobacter jejuni . Common viral contaminants include norovirus , sapovirus , rotavirus , enteroviruses , and hepatitis A and E . Parasites include Giardia lamblia , Cryptosporidium , Cyclospora cayetanensis , and microsporidia . Chemical contamination

3320-449: The cathedral , the cantabile or administrative center, which might be incorporated in a wing of a governor's palace , and the audiencia or law court. The plaza might be large enough to serve as a military parade ground. At times of crisis or fiestas , it serves as the gathering space for large crowds. Diminutives of plaza include plazuela and the latter's double diminutive plazoleta , which can be occasionally used as

3403-710: The filtration of the contaminants of concern, and additional protection may be garnered by installing well-casing screens only at depths where contamination is not present. Wellwater for personal use is often filtered with reverse osmosis water processors; this process can remove very small particles. A simple, effective way of killing microorganisms is to bring the water to a full boil for one to three minutes, depending on location. A household well contaminated by microorganisms can initially be treated by shock chlorination using bleach, generating concentrations hundreds of times greater than found in community water systems; however, this will not fix any structural problems that led to

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3486-565: The piazze of Italy are central to most towns and cities. Shops, businesses, metro stations, and bus stops are commonly found on piazzas, and in multiple locations also feature Roman Catholic Churches , such as in places known as the Piazza del Duomo , with the most famous perhaps being at Duomo di Milan , or government buildings, such as the Piazza del Quirinale adjacent from the Quirinal Palace of

3569-444: The water table . The excavation is braced horizontally to avoid landslide or erosion endangering the people digging. They can be lined with stone or brick; extending this lining upwards above the ground surface to form a wall around the well serves to reduce both contamination and accidental falls into the well. A more modern method called caissoning uses reinforced concrete or plain concrete pre-cast well rings that are lowered into

3652-513: The " Piazza Grimana ". It was purchased in 1625 by Cardinal Francesco Barberini in order to construct the Palazzo Barberini . The substantial Baroque palace was built in an elevated position on the south side of the piazza. Originally, there was a large entrance gateway to the palace designed by the Baroque painter and architect Pietro da Cortona on the south east corner of the piazza but this

3735-738: The Italian president. The Piazza San Marco in Venice and Piazza del Popolo in Rome are among the world's best known. The Italian piazzas historically played a major role in the political developments of Italy in both the Italian Medieval Era and the Italian Renaissance. For example, the Piazza della Signoria in Florence remains synonymous with the return of the Medici from their exile in 1530 as well as

3818-712: The Jezreel Valley. Wells for other purposes came along much later, historically. The first recorded salt well was dug in the Sichuan province of China around 2,250 years ago. This was the first time that ancient water well technology was applied successfully for the exploitation of salt, and marked the beginning of Sichuan's salt drilling industry. The earliest known oil wells were also drilled in China, in 347 CE. These wells had depths of up to about 240 metres (790 ft) and were drilled using bits attached to bamboo poles. The oil

3901-759: The Middle Ages to today. Squares located opposite a Palace or Castle ( German : Schloss ) are commonly named Schlossplatz . Prominent Plätze include the Alexanderplatz , Pariser Platz and Potsdamer Platz in Berlin, Heldenplatz in Vienna, and the Königsplatz in Munich. A large open square common in villages, towns and cities of Indonesia is known as alun-alun . It is a Javanese term which in modern-day Indonesia refers to

3984-909: The UK as part of urban redevelopment following the Blitz . Squares can also be quite small and resemble courtyards, especially in the City of London . In some cities, especially in New England , the term "square" (as its Spanish equivalent, plaza ) is applied to a commercial area (like Central Square in Cambridge, Massachusetts ), usually formed around the intersection of three or more streets, and which originally consisted of some open area (many of which have been filled in with traffic islands and other traffic calming features). Many of these intersections are irregular rather than square. The placita (Spanish for "little plaza"), as it

4067-636: The United States, to refer to a verandah or front porch of a house or apartment, such as at George Washington's historic home Mount Vernon . Several countries, especially around the Mediterranean Sea, feature Italian-style town squares. In Gibraltar, one such town square just off Gibraltar 's Main Street , between the Parliament Building and the City Hall officially named John Mackintosh Square

4150-508: The adjacent suburb of North Adelaide , in South Australia, were planned by Colonel William Light in 1837. The city streets were laid out in a grid plan , with the city centre including a central public square, Victoria Square , and four public squares in the centre of each quarter of the city. North Adelaide has two public squares. The city was also designed to be surrounded by park lands , and all of these features still exist today, with

4233-587: The burning at the stake of Savonarola during the Italian Inquisition . The Italian term is roughly equivalent to the Spanish plaza , the French term place, the Portuguese praça, and the German Platz. Not to be confused, other countries use the phrase to refer to an unrelated feature of architectural or urban design, such as the "piazza" at King's Cross station in London or piazza as used by some in

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4316-461: The casing during construction and filling the casing annulus with an appropriate sealing material. The sealing material (grout) should be placed from immediately above the production zone back to surface, because, in the absence of a correctly constructed casing seal, contaminated fluid can travel into the well through the casing annulus. Centering devices are important (usually one per length of casing or at maximum intervals of 9 m) to ensure that

4399-480: The contamination and generally requires some expertise and testing for effective application. After the filtration process, it is common to implement an ultraviolet (UV) system to kill pathogens in the water. UV light affects the DNA of the pathogen by UV-C photons breaking through the cell wall. UV disinfection has been gaining popularity in the past decades as it is a chemical-free method of water treatment. A risk with

4482-522: The design and installation of private and municipal septic systems take all these factors into account so that nearby drinking water sources are protected. Education of the general population in society also plays an important role in protecting drinking water. Cleanup of contaminated groundwater tends to be very costly. Effective remediation of groundwater is generally very difficult. Contamination of groundwater from surface and subsurface sources can usually be dramatically reduced by correctly centering

4565-424: The drilled well, vertically stacked with their ends nested and either glued or splined together. The sections of casing are usually 6 metres (20 ft) or more in length, and 4 to 12 in (10 to 30 cm) in diameter, depending on the intended use of the well and local groundwater conditions. Surface contamination of wells in the United States is typically controlled by the use of a surface seal . A large hole

4648-434: The drilling process is completed, regardless of the machinery used. The oldest form of drilling machinery is the cable tool , still used today. Specifically designed to raise and lower a bit into the bore hole, the spudding of the drill causes the bit to be raised and dropped onto the bottom of the hole, and the design of the cable causes the bit to twist at approximately 1 ⁄ 4 revolution per drop, thereby creating

4731-513: The formation, thus the term "drilling." Drilled wells can be excavated by simple hand drilling methods (augering, sludging, jetting, driving, hand percussion) or machine drilling (auger, rotary, percussion, down the hole hammer). Deep rock rotary drilling method is most common. Rotary can be used in 90% of formation types (consolidated). Drilled wells can get water from a much deeper level than dug wells can − often down to several hundred metres. Drilled wells with electric pumps are used throughout

4814-494: The gate's front space as a public plaza. The square has been renovated to modern style has new waterways & rest Areas, exhibition Hall for Excavated Cultural Assets in 2022 Aug. The Spanish-language term for a public square is plaza ( [ˈplasa] or [ˈplaθa] depending on the dialectal variety). It comes from Latin platea , with the meaning of 'broad street' or 'public square'. Ultimately coming from Greek πλατεῖα (ὁδός) plateia (hodos) , it

4897-427: The grouted annular space is of even thickness. Upon the construction of a new test well, it is considered best practice to invest in a complete battery of chemical and biological tests on the well water in question. Point-of-use treatment is available for individual properties and treatment plants are often constructed for municipal water supplies that suffer from contamination. Most of these treatment methods involve

4980-694: The growth of iron and manganese bacteria that can form slimy black colonies that clog pipes. The quality of the well water can be significantly increased by lining the well, sealing the well head, fitting a self-priming hand pump, constructing an apron, ensuring the area is kept clean and free from stagnant water and animals, moving sources of contamination ( pit latrines , garbage pits, on-site sewer systems ) and carrying out hygiene education. The well should be cleaned with 1% chlorine solution after construction and periodically every 6 months. Well holes should be covered to prevent loose debris, animals, animal excrement, and wind-blown foreign matter from falling into

5063-569: The heart of a traditional town , and which is used for community gatherings. A square in a city may be called a city square . Related concepts are the civic center , the market square and the village green . Most squares are hardscapes suitable for open markets , concerts , political rallies, and other events that require firm ground. They are not necessarily a true geometric square . Being centrally located, town squares are usually surrounded by small shops such as bakeries, meat markets, cheese stores, and clothing stores. At their center

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5146-416: The hole and decomposing. The cover should be able to be in place at all times, including when drawing water from the well. A suspended roof over an open hole helps to some degree, but ideally the cover should be tight fitting and fully enclosing, with only a screened air vent. Minimum distances and soil percolation requirements between sewage disposal sites and water wells need to be observed. Rules regarding

5229-635: The hole. A well-digging team digs under a cutting ring and the well column slowly sinks into the aquifer , whilst protecting the team from collapse of the well bore . Hand-dug wells are inexpensive and low tech (compared to drilling) and they use mostly manual labour to access groundwater in rural locations of developing countries. They may be built with a high degree of community participation, or by local entrepreneurs who specialize in hand-dug wells. They have been successfully excavated to 60 metres (200 ft). They have low operational and maintenance costs, in part because water can be extracted by hand, without

5312-561: The hole. Driven wells can be created in unconsolidated material with a well hole structure, which consists of a hardened drive point and a screen of perforated pipe, after which a pump is installed to collect the water. Deeper wells can be excavated by hand drilling methods or machine drilling, using a bit in a borehole . Drilled wells are usually cased with a factory-made pipe composed of steel or plastic. Drilled wells can access water at much greater depths than dug wells. Two broad classes of well are shallow or unconfined wells completed within

5395-451: The making of plazas. They can be used to open spaces for low-income neighborhoods, and can also the overall aesthetic of the surrounding area boosting economic vitality, pedestrian mobility and safety for pedestrians. Most plazas are created out of a collaboration between local non-profit applicants and city officials which requires approval from the city. Throughout North America, words like place , square , or plaza frequently appear in

5478-466: The names of commercial developments such as shopping centers and hotels. Well Wells have traditionally been sunk by hand digging, as is still the case in rural areas of the developing world. These wells are inexpensive and low-tech as they use mostly manual labour, and the structure can be lined with brick or stone as the excavation proceeds. A more modern method called caissoning uses pre-cast reinforced concrete well rings that are lowered into

5561-406: The placement of water wells is soil salination which occurs when the water table of the soil begins to drop and salt begins to accumulate as the soil begins to dry out. Another environmental problem that is very prevalent in water well drilling is the potential for methane to seep through. The potential for soil salination is a large risk when choosing the placement of water wells. Soil salination

5644-478: The screen and the borehole or casing. This allows the water to be filtered of unwanted materials before entering the well and pumping zone. There are two broad classes of drilled-well types, based on the type of aquifer the well is in: A special type of water well may be constructed adjacent to freshwater lakes or streams. Commonly called a collector well but sometimes referred to by the trade name Ranney well or Ranney collector , this type of well involves sinking

5727-630: The site of the May Fourth Movement , the Proclamation of the People's Republic of China , the 1976 Tiananmen Incident , the 1989 Tiananmen Square Protests , and all Chinese National Day Parades . The German word for square is Platz , which also means "Place", and is a common term for central squares in German-speaking countries. These have been focal points of public life in towns and cities from

5810-464: The squares maintained as mostly green spaces. In Mainland China, People's Square is a common designation for the central town square of modern Chinese cities, established as part of urban modernization within the last few decades. These squares are the site of government buildings, museums and other public buildings. One such square, Tiananmen Square , is a famous site in Chinese history due to it being

5893-431: The surface can easily reach shallow sources and contamination of the supply by pathogens or chemical contaminants needs to be avoided. Well water typically contains more minerals in solution than surface water and may require treatment before being potable. Soil salination can occur as the water table falls and the surrounding soil begins to dry out. Another environmental problem is the potential for methane to seep into

5976-413: The surface to the next confining layer that keeps contaminants from traveling down the outer sidewalls of the casing or borehole and into the aquifer . In addition, wells are typically capped with either an engineered well cap or seal that vents air through a screen into the well, but keeps insects, small animals, and unauthorized persons from accessing the well. At the bottom of wells, based on formation,

6059-551: The term "maidan" across Eastern Europe and Central Asia, including Ukraine, in which the term became well-known globally during the Euromaidan . A piazza ( Italian pronunciation: [ˈpjattsa] ) is a city square in Italy , Malta , along the Dalmatian coast and in surrounding regions. Possibly influenced by the centrality of the Forum (Roman) to ancient Mediterranean culture,

6142-663: The two large open squares of kraton compounds. It is typically located adjacent a mosque or a palace. It is a place for public spectacles, court celebrations and general non-court entertainments. In traditional Persian architecture, town squares are known as maydan or meydan. A maydan is considered one of the essential features in urban planning and they are often adjacent to bazaars, large mosques and other public buildings. Naqsh-e Jahan Square in Isfahan and Azadi Square in Tehran are examples of classic and modern squares. Several countries use

6225-407: The uppermost saturated aquifer at that location, and deep or confined wells, sunk through an impermeable stratum into an aquifer beneath. A collector well can be constructed adjacent to a freshwater lake or stream with water percolating through the intervening material. The site of a well can be selected by a hydrogeologist , or groundwater surveyor. Water may be pumped or hand drawn. Impurities from

6308-418: The use of the well: A water well constructed for pumping groundwater can be used passively as a monitoring well and a small diameter well can be pumped, but this distinction by use is common. Before excavation, information about the geology, water table depth, seasonal fluctuations, recharge area and rate should be found if possible. This work can be done by a hydrogeologist , or a groundwater surveyor using

6391-481: The water. Very early Neolithic wells are known from the Eastern Mediterranean . The oldest reliably dated well is from the pre-pottery neolithic (PPN) site of Kissonerga-Mylouthkia on Cyprus . At around 8400 BC a shaft (well 116) of circular diameter was driven through limestone to reach an aquifer at a depth of 8 metres (26 ft). Well 2070 from Kissonerga-Mylouthkia, dating to the late PPN, reaches

6474-505: The well bore, falling objects and asphyxiation, including from dewatering pump exhaust fumes. The Woodingdean Water Well , hand-dug between 1858 and 1862, is the deepest hand-dug well at 392 metres (1,285 ft). The Big Well in Greensburg, Kansas , is billed as the world's largest hand-dug well, at 109 feet (33 m) deep and 32 feet (9.8 m) in diameter. However, the Well of Joseph in

6557-400: The well slowly decreases and is removed from the well. Rock wells are typically cased with a PVC liner/casing and screen or slotted casing at the bottom, this is mostly present just to keep rocks from entering the pump assembly. Some wells utilize a filter pack method, where an undersized screen or slotted casing is placed inside the well and a filter medium is packed around the screen, between

6640-402: The world, typically in rural or sparsely populated areas, though many urban areas are supplied partly by municipal wells. Most shallow well drilling machines are mounted on large trucks, trailers, or tracked vehicle carriages. Water wells typically range from 3 to 18 metres (10–60 ft) deep, but in some areas it can go deeper than 900 metres (3,000 ft). Rotary drilling machines use

6723-517: Was burned to evaporate brine and produce salt . By the 10th century, extensive bamboo pipelines connected oil wells with salt springs. The ancient records of China and Japan are said to contain many allusions to the use of natural gas for lighting and heating. Petroleum was known as Burning water in Japan in the 7th century. Until recent centuries, all artificial wells were pumpless hand-dug wells of varying degrees of sophistication, and they remain

6806-444: Was demolished to make way for the construction of a new road in the 19th century. However, its appearance is known from engravings and early photographs of the piazza. The Palazzo contained the "Teatro Barberini", built by Bernini in 1634, and intended as a court theatre. It was entered by way of a large arch. At the centre of the piazza is the Fontana del Tritone or Triton Fountain (1642–3) sculpted by Bernini . Another fountain,

6889-530: Was found in 1570 outside the Porta Maggiore . In 1632 it was acquired by Pope Urban VIII (Maffeo Barberini) for the grounds of his new family palazzo. In 1822 Pope Pius II had it transferred to the gardens of the Villa Medici . The piazza was the site of the start of the "Triumph of strawberries", a procession of carriages, carts, and agricultural floats adorned with strawberries and festoons of flowers with

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