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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 was installed, producing a fixed white ligh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oeiras, Portugal
Oeiras () is a town and 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 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 tertiary education attainment in the country, their entr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lisbon District
Lisbon District ( pt, Distrito de Lisboa, ) 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 !co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Portugal
Portugal, officially the Portuguese Republic ( pt, República Portuguesa, links=yes ), is a country whose mainland is located on the Iberian Peninsula of Southwestern Europe, and whose territory also includes the Atlantic archipelagos of the Azores and Madeira. It features the westernmost point in continental Europe, and its Iberian portion is bordered to the west and south by the Atlantic Ocean and to the north and east by Spain, the sole country to have a land border with Portugal. Its two archipelagos form two autonomous regions with their own regional governments. Lisbon is the capital and largest city by population. Portugal is the oldest continuously existing nation state on the Iberian Peninsula and one of the oldest in Europe, its territory having been continuously settled, invaded and fought over since prehistoric times. It was inhabited by pre-Celtic and Celtic peoples who had contact with Phoenicians and Ancient Greek traders, it was ruled by the Ro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Light Characteristic
A light characteristic is all of the properties that make a particular 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 three 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" for red, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
River Tagus
The Tagus ( ; es, Tajo ; pt, Tejo ; see below) is the longest river in the Iberian Peninsula. The river rises in the Montes Universales near Teruel, in mid-eastern Spain, flows , generally west with two main south-westward sections, to empty into the Atlantic Ocean in Lisbon. Its drainage basin covers – exceeded in the peninsula only by the Douro. The river is highly used. Several dams and diversions supply drinking water to key population centres of central Spain and Portugal; dozens of hydroelectric stations create power. Between dams it follows a very constricted course, but after Almourol, Portugal it has a wide alluvial valley, prone to flooding. Its mouth is a large estuary culminating at the major port, and Portuguese capital, Lisbon. The source is specifically: in political geography, at the Fuente de García in the Frías de Albarracín municipality; in physical geography, within the notably high range, the Sistema Ibérico (Iberian System), of the Sierr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oeiras (Portugal)
Oeiras () is a town and 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 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 tertiary education attainment in the country, their ent ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fort Of São Julião Da Barra
The São Julião da Barra Fort is the largest and most complete military defense complex in the 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 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, to his son and successor, John III. In 1549 John III created the position of Master of the Works of Fortification of the Kingdom, and initially entrus ... [...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, 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 and about southwest of Lisbon. Chronologically, it was the third known large scale earthquake to hit the city (following those of 1321 and 1531). Estimates place the death toll in Lisbon at between 12,000 and 50,000 people, making it one of the deadliest earthquakes in history. The earthquake accentuated political tensions in Portugal and profoundly disrupted the Portuguese Empire. The event was widely discussed and dwelt upon by European ... [...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 mou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fresnel Lens
A Fresnel lens ( ; ; or ) is a type of composite compact lens developed by the French physicist Augustin-Jean Fresnel (1788–1827) for use in lighthouses. It has been called "the invention that saved a million ships." 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 design. A Fresnel lens can be made much thinner than a comparable conventional lens, in some cases taking the form of a flat sheet. The simpler dioptric (purely refractive) form of the lens was first proposed by Count Buffon and independently reinvented by Fresnel. The ''catadioptric'' form of the lens, entirely invented by Fresnel, has outer elements that use total internal reflection as well as refraction; it can capture more oblique light from a light source and add it to the beam of a lighthouse, making the light visible from greater distances. Description The Fresnel lens redu ... [...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 ligh ... [...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. 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 unpredictable channel patt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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