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São Julião Lighthouse (Portugal)
The São Julião Lighthouse is located in the fort of the same name, which is the largest sea defence structure in Portugal and is situated on a headland on the north bank of the River Tagus estuary in Oeiras, Lisbon District. It is a square masonry tower and the lantern is painted white, with a red dome. History The fort of São Julião da Barra was constructed primarily for defence and follows an irregular pentagonal design. Today it is the national headquarters of the Ministry of National Defence and official residence of the Minister. In 1758 orders were given to build a lighthouse in the fort. However, it is possible that an earlier lighthouse had existed from 1553 but that it was destroyed by the 1755 Lisbon earthquake. The work initially involved building a stone lantern in 1761 but in 1775 an Argand lamp with a parabolic reflector was installed. Between 1848 and 1865 modernization work was carried out and a 4th Order Fresnel lens A Fresnel lens ( ; ; or ) is a type of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oeiras, Portugal
Oeiras () is a town and concelho, municipality in the western part of Lisbon metropolitan area, located within the Portuguese Riviera, in continental Portugal. The municipality is part of the urban agglomeration of Lisbon and the town of Oeiras is about 16 km from Lisbon downtown. The population in 2011 was 172,120 living in an area of 45.88 km2, making the municipality the fifth-most densely populated in Portugal. Oeiras is an important economic hub, being one of the most highly developed municipalities of Portugal and Europe. It has the highest Gross domestic product, GDP per capita in the country, being also the second highest-ranking municipality (immediately after Lisbon) in terms of purchasing power as well as the second highest-ranking in the country as far as tax collection is concerned. These economic indicators also reflect the education level of its inhabitants, as Oeiras is the municipality with the highest concentration of population by List of countries by te ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lisbon District
Lisbon District () is a district located along the western coast of Portugal. The district capital is the city of Lisbon, which is also the national capital. From its creation until 1926, it included the area of the current Setúbal District. Municipalities The district is composed of 16 municipalities: * Alenquer * Amadora * Arruda dos Vinhos * Azambuja * Cadaval * Cascais * Lisbon * Loures * Lourinhã * Mafra * Odivelas * Oeiras * Sintra * Sobral de Monte Agraço * Torres Vedras * Vila Franca de Xira Summary of votes and seats won (1976–2022) , - class="unsortable" !rowspan=2, Parties!!%!!S!!%!!S!!%!!S!!%!!S!!%!!S!!%!!S!!%!!S!!%!!S!!%!!S!!%!!S!!%!!S!!%!!S!!%!!S!!%!!S!!%!!S!!%!!S , - class="unsortable" align="center" !colspan=2 , 1976 !colspan=2 , 1979 !colspan=2 , 1980 !colspan=2 , 1983 !colspan=2 , 1985 !colspan=2 , 1987 !colspan=2 , 1991 !colspan=2 , 1995 !colspan=2 , 1999 !colspan=2 , 2002 !colspan=2 , 2005 !colspan=2 , 2009 !colspan=2 , 2 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Portugal
Portugal, officially the Portuguese Republic, is a country on the Iberian Peninsula in Southwestern Europe. Featuring Cabo da Roca, the westernmost point in continental Europe, Portugal borders Spain to its north and east, with which it shares Portugal-Spain border, the longest uninterrupted border in the European Union; to the south and the west is the North Atlantic Ocean; and to the west and southwest lie the Macaronesia, Macaronesian archipelagos of the Azores and Madeira, which are the two Autonomous Regions of Portugal, autonomous regions of Portugal. Lisbon is the Capital city, capital and List of largest cities in Portugal, largest city, followed by Porto, which is the only other Metropolitan areas in Portugal, metropolitan area. The western Iberian Peninsula has been continuously inhabited since Prehistoric Iberia, prehistoric times, with the earliest signs of Human settlement, settlement dating to 5500 BC. Celts, Celtic and List of the Pre-Roman peoples of the Iberia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Light Characteristic
A light characteristic is all of the properties that make a particular somewhat navigational light identifiable. Graphical and textual descriptions of navigational light sequences and colours are displayed on nautical charts and in Light Lists with the chart symbol for a lighthouse, lightvessel, buoy or sea mark with a light on it. Different lights use different colours, frequencies and light patterns, so mariners can identify which light they are seeing. Abbreviations While light characteristics can be described in prose, e.g. "Flashing white every two seconds", lists of lights and navigation chart annotations use abbreviations. The abbreviation notation is slightly different from one light list to another, with dots added or removed, but it usually follows a pattern similar to the following (see the chart to the right for examples). * An abbreviation of the type of light, e.g. "Fl." for Flashing, "F." for Fixed. * The color of the light, e.g. "W" for White, "G" for Green, "R" ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
River Tagus
The Tagus ( ; ; ) is the longest river in the Iberian Peninsula. The river rises in the Montes Universales between Cuenca and Teruel, in mid-eastern Spain, flows , generally westward, and empties into the Atlantic Ocean in Lisbon. Name The river's Latin name is ''Tagus''. While the etymology is unclear, the most probable etymological origin for the hydronym ''Tagus'' is Indo-European *(s)tag- ('to drip'). Geography Source The Tagus River originates at an elevation of 1,593 meters above sea level in a place known as Fuente García, within the municipality of Frías de Albarracín in Teruel, Spain. Its source is located between the Muela de San Juan (1,830 m) and Cerro de San Felipe (1,839 m), in the Sierra de Albarracín, which belongs to the Montes Universales in the western branch of the Iberian System. Course The river flows through Spain for , passing through four autonomous communities (Aragón, Castilla-La Mancha, Madrid, and Extremadura) and a total of six pr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oeiras (Portugal)
Oeiras () is a town and concelho, municipality in the western part of Lisbon metropolitan area, located within the Portuguese Riviera, in continental Portugal. The municipality is part of the urban agglomeration of Lisbon and the town of Oeiras is about 16 km from Lisbon downtown. The population in 2011 was 172,120 living in an area of 45.88 km2, making the municipality the fifth-most densely populated in Portugal. Oeiras is an important economic hub, being one of the most highly developed municipalities of Portugal and Europe. It has the highest Gross domestic product, GDP per capita in the country, being also the second highest-ranking municipality (immediately after Lisbon) in terms of purchasing power as well as the second highest-ranking in the country as far as tax collection is concerned. These economic indicators also reflect the education level of its inhabitants, as Oeiras is the municipality with the highest concentration of population by List of countries by te ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fort Of São Julião Da Barra
The Fort of São Julião da Barra is the largest and most complete military defence complex in the Sébastien Le Prestre de Vauban, Vauban style remaining in Portugal. It is located in São Julião da Barra, on the point of São Gião, in the parish of Oeiras e São Julião da Barra, Paço de Arcos e Caxias, Oeiras, Portugal, Oeiras Municipality, Lisbon District. Considered in the past as the most important maritime fortification in the country, it had originally, together with the Fort of São Lourenço do Bugio, the role of controlling access to the port of Lisbon. It is currently the official residence of the Portuguese Minister of National Defence. History Starting from small beginnings, São Julião has been modified, expanded and adapted over several centuries. The construction of a fort on the right bank of the Tagus River was recommended by the King of Portugal, Manuel I of Portugal, Manuel I, to his son and successor, John III of Portugal, John III. In 1549 John III cre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1755 Lisbon Earthquake
The 1755 Lisbon earthquake, also known as the Great Lisbon earthquake, impacted Portugal, the Iberian Peninsula, and Northwest Africa on the morning of Saturday, 1 November, All Saints' Day, Feast of All Saints, at around 09:40 local time. In combination with subsequent fires and a tsunami, the earthquake almost completely destroyed Lisbon and adjoining areas. Seismologists estimate the Lisbon earthquake had a magnitude of 7.7 or greater on the moment magnitude scale, with its epicenter in the Atlantic Ocean about west-southwest of Cape St. Vincent, a cape in Algarve region, and about southwest of Lisbon. Chronologically, it was the third known large-scale earthquake to hit the city (following those of 1332 and 1531 Lisbon earthquake, 1531). Estimates place the death toll in Lisbon around 30,000–40,000. A further 10,000 may have died in Morocco. The earthquake accentuated political tensions in Portugal and profoundly disrupted the Portuguese Empire. The event was widely di ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Argand Lamp
The Argand lamp is a type of oil lamp invented in 1780 by Aimé Argand. Its output is 6 to 10 candelas, brighter than that of earlier lamps. Its more complete combustion of the candle wick and oil than in other lamps required much less frequent trimming of the wick. In France, the lamp is called "Quinquet", after Antoine-Arnoult Quinquet, a pharmacist in Paris, who used the idea originated by Argand and popularized it in France. Quinquet sometimes is credited with the addition of the glass chimney to the lamp. Design The Argand lamp had a sleeve-shaped wick mounted so that air can pass both through the center of the wick and also around the outside of the wick before being drawn into a cylindrical chimney which steadies the flame and improves the flow of air. Early models used ground glass which was sometimes tinted around the wick. An Argand lamp used whale oil, seal oil, colza, olive oil or other vegetable oil as fuel which was supplied by a gravity feed from a reservoir ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fresnel Lens
A Fresnel lens ( ; ; or ) is a type of composite compact lens (optics), lens which reduces the amount of material required compared to a conventional lens by dividing the lens into a set of concentric annular sections. The simpler Dioptrics, dioptric (purely refraction, refractive) form of the lens was first proposed by Georges-Louis Leclerc, Comte de Buffon, and independently reinvented by the French physicist Augustin-Jean Fresnel (1788–1827) for use in lighthouses. The Catadioptric system, catadioptric (combining refraction and reflection) form of the lens, entirely invented by Fresnel, has outer Prism (optics), prismatic elements that use total internal reflection as well as refraction to capture more oblique light from the light source and add it to the beam, making it visible at greater distances. The design allows the construction of lenses of large aperture and short focal length without the mass and volume of material that would be required by a lens of conventional ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bugio Lighthouse (Portugal)
The Bugio Lighthouse is situated on an island in the estuary of the River Tagus on the Fort of São Lourenço do Bugio, about ten kilometres west of Lisbon. It falls under the municipality of Oeiras in Lisbon District. History Attacks by French and Turkish pirates, especially in 1552 and 1556, demonstrated the need for Portugal to strengthen the defence of Lisbon. This led to the decision to fortify the island of S. Julião da Barra in the River Tagus estuary in 1556. The fort of São Lourenço do Bugio followed in 1590. As early as 1693, the fort is believed to have already possessed a light to aid navigation. An inspection of the lighthouse in 1751 reported that the fire was fuelled with olive oil and operated from October to March. This original lighthouse was destroyed during the 1755 Lisbon earthquake but in 1758, Sebastião José de Carvalho e Melo, 1st Marquis of Pombal ordered the construction of six new lighthouses, including a new one at Bugio. In 1775, the new light ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bar (river Morphology)
A bar in a river is an elevated region of sediment (such as sand or gravel) that has been deposited by the flow. Types of bars include mid-channel bars (also called braid bars and common in braided rivers), point bars (common in meandering rivers), and mouth bars (common in river deltas). The locations of bars are determined by the geometry of the river and the flow through it. Bars reflect sediment supply conditions, and can show where sediment supply rate is greater than the transport capacity. Mid-channel bars A mid-channel bar is also often referred to as a braid bar because they are often found in braided river channels. Braided river channels are broad and shallow and found in areas where sediment is easily eroded like at a glacial outwash, or at a mountain front with high sediment loads. These types of river systems are associated with high slope, sediment supply, stream power, shear stress, and bed load transport rates. Braided rivers have complex and unpredict ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
