1.
Argentina
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Argentina, officially the Argentine Republic, is a federal republic in the southern half of South America. With a mainland area of 2,780,400 km2, Argentina is the eighth-largest country in the world, the second largest in Latin America, and the largest Spanish-speaking one. The country is subdivided into provinces and one autonomous city, Buenos Aires. The provinces and the capital have their own constitutions, but exist under a federal system, Argentina claims sovereignty over part of Antarctica, the Falkland Islands, and South Georgia and the South Sandwich Islands. The earliest recorded presence in the area of modern-day Argentina dates back to the Paleolithic period. The country has its roots in Spanish colonization of the region during the 16th century, Argentina rose as the successor state of the Viceroyalty of the Río de la Plata, a Spanish overseas viceroyalty founded in 1776. The country thereafter enjoyed relative peace and stability, with waves of European immigration radically reshaping its cultural. The almost-unparalleled increase in prosperity led to Argentina becoming the seventh wealthiest developed nation in the world by the early 20th century, Argentina retains its historic status as a middle power in international affairs, and is a prominent regional power in the Southern Cone and Latin America. Argentina has the second largest economy in South America, the third-largest in Latin America and is a member of the G-15 and it is the country with the second highest Human Development Index in Latin America with a rating of very high. Because of its stability, market size and growing high-tech sector, the description of the country by the word Argentina has to be found on a Venice map in 1536. In English the name Argentina probably comes from the Spanish language, however the naming itself is not Spanish, Argentina means in Italian of silver, silver coloured, probably borrowed from the Old French adjective argentine of silver > silver coloured already mentioned in the 12th century. The French word argentine is the form of argentin and derives of argent silver with the suffix -in. The Italian naming Argentina for the country implies Argentina Terra land of silver or Argentina costa coast of silver, in Italian, the adjective or the proper noun is often used in an autonomous way as a substantive and replaces it and it is said lArgentina. The name Argentina was probably first given by the Venitian and Genoese navigators, in Spanish and Portuguese, the words for silver are respectively plata and prata and of silver is said plateado and prateado. Argentina was first associated with the silver mountains legend, widespread among the first European explorers of the La Plata Basin. The first written use of the name in Spanish can be traced to La Argentina, a 1602 poem by Martín del Barco Centenera describing the region, the 1826 constitution included the first use of the name Argentine Republic in legal documents. The name Argentine Confederation was also used and was formalized in the Argentine Constitution of 1853. In 1860 a presidential decree settled the name as Argentine Republic
2.
Ramsar Convention
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The Ramsar Convention is an international treaty for the conservation and sustainable use of wetlands. It is also known as the Convention on Wetlands and it is named after the city of Ramsar in Iran, where the Convention was signed in 1971. The most recent COP12 was held in Punta del Este, Uruguay, cOP13 will take place in Dubai, United Arab Emirates, in 2018. The List of Wetlands of International Importance included 2,231 Ramsar Sites in March 2016 covering over 2.1 million square kilometres. The country with the highest number of Sites is the United Kingdom with 170, the Ramsar Sites Information Service is a searchable database which provides information on each Ramsar Site. As of 2016 there are 18 Transboundary Ramsar Sites, as of 2016 there are 15 Ramsar Regional Initiatives covering regions of the Mediterranean, Asia, Africa and South America. The Ramsar Convention works closely with six other known as International Organization Partners. The IOPs also participate regularly as observers in all meetings of the Conference of the Parties and as members of the Scientific. Conference of the Parties Conference of the Parties is the Conventions governing body consisting of all governments that have ratified the treaty and this ultimate authority reviews progress under the Convention, identifies new priorities, and sets work plans for members. The COP can also make amendments to the Convention, create expert advisory bodies, review progress reports by member nations, and collaborate with other international organizations and agreements. The Standing Committee The Standing Committee is the executive body which represents the COP between its triennial meetings, within the framework of the decisions made by the COP. The Contracting Parties that are members of the Standing Committee are elected by each meeting of the COP to serve for the three years until the next one, the Secretariat The Secretariat carries out the day-to-day coordination of the Convention’s activities. It is based at the headquarters of the International Union for the Conservation of Nature in Gland, Switzerland, the 2nd of February each year is World Wetlands Day, marking the date of the adoption of the Convention on Wetlands on 2 February 1971. Established to raise awareness about the value of wetlands for humanity, in 2015 World Wetlands Day was celebrated in 59 countries
3.
Tigre, Buenos Aires
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Tigre is a town in the Buenos Aires Province, Argentina, situated in the north of Greater Buenos Aires,28 km north of Buenos Aires city. Tigre lies on the Paraná Delta and is an important tourist and weekend attraction, easily reached by bus and train services and it is the principal town of the Tigre Partido. The town sits on an island created by small streams and rivers and was founded in 1820, after floods had destroyed other settlements in the area. The areas name derives from the “tigres” or jaguars that were hunted there, on occasions, in its early years. The area was first settled by Europeans who came to farm the land, Tigre is still an important timber processing port. The “Puerto de Frutos” is now a crafts fair located in the old fruit market by the riverside, the Naval Museum is also nearby. Antiques shops, riverside restaurants and pubs, the casino and Parque de la Costa, Tigre is also the starting point for a visit to the Paraná Delta. For locals and tourists alike, vintage mahogany commuter launches and motorboats are the way to travel through its web of inter-connecting rivers. Tigre has, in recent years, seen an influx of people relocating to the city from other parts of Greater Buenos Aires, in recent years it has seen a rise in upmarket tourism, spawning new spa developments and clientele such as the pop star, Madonna. The town of Tigre is served by two lines, the Mitre Line and the scenic Tren de la Costa, both terminate at walking distance from all venues. Mitre Line Retiro – Tigre The Mitre Line departs from Buenos Aires Retiro Station to Tigre Station every 10 –30 minutes. The Tren de la Costa has two types of tickets, a direct Maipú – Delta service and another allows the visitor off at various stations without paying any extra. The Tren de la Costa runs every twenty minutes daily, commuter passenger boats, water taxis and ferries provide public transport within the Tigre Delta. Villa Paranacito, Entre Ríos Paraná Delta Official Municipality web site Official travel site Victorica Promenade A Jaguars Warning
4.
River delta
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A river delta is a landform that forms from deposition of sediment carried by a river as the flow leaves its mouth and enters slower-moving or standing water. This occurs where a river enters an ocean, sea, estuary, lake, reservoir, River deltas are ecologically important as they provide coastline defense, are home to many species, and can impact drinking water supply. The tidal currents also cannot be too strong, as sediment would wash out into the body faster than the river deposits it. Of course, the river must carry enough sediment to layer into deltas over time, the rivers velocity decreases rapidly, causing it to deposit the majority, if not all, of its load. This alluvium builds up to form the river delta, when the flow enters the standing water, it is no longer confined to its channel and expands in width. This flow expansion results in a decrease in the flow velocity, as a result, sediment drops out of the flow and deposits. Over time, this single channel builds a deltaic lobe, pushing its mouth into the standing water, as the deltaic lobe advances, the gradient of the river channel becomes lower because the river channel is longer but has the same change in elevation. As the slope of the channel decreases, it becomes unstable for two reasons. First, gravity makes the flow in the most direct course down slope. If the river breaches its natural levees, it out onto a new course with a shorter route to the ocean. Second, as its slope gets lower, the amount of stress on the bed decreases, which results in deposition of sediment within the channel. This makes it easier for the river to breach its levees, often when the channel does this, some of its flow remains in the abandoned channel. When these channel-switching events occur, a mature delta develops a distributary network, another way these distributary networks form is from deposition of mouth bars. When this mid-channel bar is deposited at the mouth of a river and this results in additional deposition on the upstream end of the mouth-bar, which splits the river into two distributary channels. A good example of the result of this process is the Wax Lake Delta, in both of these cases, depositional processes force redistribution of deposition from areas of high deposition to areas of low deposition. This results in the smoothing of the shape of the delta as the channels move across its surface. Because the sediment is laid down in fashion, the shape of these deltas approximates a fan. The more often the flow changes course, the shape develops as closer to an ideal fan, the Mississippi and Ural River deltas, with their birds-feet, are examples of rivers that do not avulse often enough to form a symmetrical fan shape
5.
Alluvium
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Alluvium is loose, unconsolidated soil or sediments, which has been eroded, reshaped by water in some form, and redeposited in a non-marine setting. Alluvium is typically made up of a variety of materials, including fine particles of silt and clay and larger particles of sand, when this loose alluvial material is deposited or cemented into a lithological unit, or lithified, it is called an alluvial deposit. The term alluvium is not typically used in situations where the formation of the sediment can clearly be attributed to another process that is well described. This includes, lake sediments, river sediments, or glacially-derived sediments, sediments that are formed or deposited in a perennial stream or river are typically not referred to as alluvial. Most alluvium is very young, and is often referred to as cover because these sediments obscure the underlying bedrock. Most sedimentary material that fills a basin that is not lithified is typically lumped together as alluvial, alluvium of Pliocene age occurs, for example, in parts of Idaho. Alluvium of late Miocene age occurs, for example, in the valley of the San Joaquin River, alluvium can contain valuable ores such as gold and platinum and a wide variety of gemstones. Such a concentration of ores is termed a placer deposit
6.
Floodplain
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In other words, a floodplain is an area near a river or a stream which floods when the water level reaches flood stage. Flood plains are made by a meander eroding sideways as it travels downstream, when a river breaks its banks and floods, it leaves behind layers of alluvium. These gradually build up to create the floor of the flood plain, floodplains generally contain unconsolidated sediments, often extending below the bed of the stream. These are accumulations of sand, gravel, loam, silt, and/or clay, and are often important aquifers, geologically ancient floodplains are often represented in the landscape by fluvial terraces. These are old floodplains that remain relatively high above the present floodplain and it is probable that any section of such an alluvial plain would show deposits of a similar character. The floodplain during its formation is marked by meandering or anastomotic streams, oxbow lakes and bayous, marshes or stagnant pools, and is occasionally completely covered with water. When the drainage system has ceased to act or is diverted for any reason. The floodplain differs, however, because it is not altogether flat and it has a gentle slope downstream, and often, for a distance, from the side towards the center. The floodplain is the place for a river to dissipate its energy. Meanders form over the floodplain to slow down the flow of water, in terms of flood management the upper part of the floodplain is crucial as this is where the flood water control starts. Artificial canalisation of the river here will have a impact on wider flooding. This is the basis of flood management. Floodplains can support particularly rich ecosystems, both in quantity and diversity, tugay forests form an ecosystem associated with floodplains, especially in Central Asia. They are a category of riparian zones or systems, a floodplain can contain 100 or even 1,000 times as many species as a river. Microscopic organisms thrive and larger species enter a rapid breeding cycle, opportunistic feeders move in to take advantage. The production of nutrients peaks and falls away quickly, however the surge of new growth endures for some time and this makes floodplains particularly valuable for agriculture. River flow rates are undergoing change following suit with climate change and this change is a threat to the riparian zones and other flood plain forests. These forests have over time synced their seedling deposits after the peaks in flow to best take advantage of the nutrient rich soil generated by peak flow
7.
Santa Fe Province
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The Province of Santa Fe is a province of Argentina, located in the center-east of the country. Neighboring provinces are from the north clockwise Chaco, Corrientes, Entre Ríos, Buenos Aires, Córdoba, together with Córdoba and Entre Ríos, the province is part of the economico-political association known as the Center Region. Santa Fes most important cities are Rosario, the capital Santa Fe, Rafaela, Villa Gobernador Gálvez, Venado Tuerto, Reconquista, and Santo Tomé. The adult literacy rate in the province is 96. 3% The aboriginal tribes who inhabited this region were the Tobas, Timbúes, Mocovíes, Pilagás, Guaycurúes and they were nomadic, lived from hunting, fishing and fruit recollection. In 1573 Juan de Garay founded the city of Santa Fe in the surroundings of present town Cayastá, but the city was moved in 1651 and 1660 to its present location. In 1812 the lawyer and general Manuel Belgrano created and displayed for the first time the Argentine flag on the banks of the Paraná River and this period was short lived, since that same year Candioti died and central government reestablished the dependent government. However, in 1816, the caudillos Mariano Vera and Estanislao López deposed the governor delegate and proclaimed the sovereignty of the province, during the civil strifes of 1820, Santa Fe troops were decisive in the defeat of Buenos Aires centralist army. So, in time, López gradually became the Federations Patriarch, after Lópezs death it was his secretary and right hand, José María Cullen the one elected governor. These two parties had many strong electoral contests with the conservative parties. After the Electoral Reform of Roque Sáenz Peña in 1912, the UCR reached the government, during this time, more precisely in 1919, the National University of the Littoral was founded. In 1932 it was the PDP who got the governors seat, the contentious 1958 elections brought an ally of President-elect Arturo Frondizi to power in Santa Fe, Dr. Carlos Sylvestre Begnis. The tunnel, most of which runs under the massive Paraná River, is the longest in Argentina, forced to resign after conservative pressure drove Pres. Frondizi from office in 1962, Begnis had the satisfaction of seeing Hernandarias open in 1969, Santa Fe suffered the violence of the late 70s and the depression of the 1980s more than most other provinces. It continued to languish economically during the prosperous 1990s, as the revalued Argentine peso put pressure on its productive sectors, touching bottom around 2002, its economy has grown by 7% a year since then. Most of the consists of green flatlands, part of the humid Pampas. There are low sierras to the west, the south presents lower temperatures, averaging 14 °C, and slightly less precipitations. Thunderstorms are common, and so are heat waves what can bring temperatures up to 40 °C and these are often interrupted by cold fronts that bring crisp, cool weather from the south. March brings cooler nights in the south, and April brings comfortable weather, with highs ranging from 22 °C in the south to 26 °C in the north, winter is dryer in the west of the province and wetter in the east
8.
Rosario, Santa Fe
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Rosario is the largest city in the province of Santa Fe, in central Argentina. It is located 300 km northwest of Buenos Aires, on the shore of the Paraná River. Rosario is the third most populous city in the country, and is also the most populous city in Argentina that is not a provincial capital, with a growing and important metropolitan area, Greater Rosario has an estimated population of 1,276,000 as of 2012. One of its main attractions includes the architecture that has been retained over the centuries in hundreds of residences, houses. Rosario is the city of the Rosario Department and is located at the heart of the major industrial corridor in Argentina. The city is a railroad terminal and the shipping center for north-eastern Argentina. Ships reach the city via the Paraná River, which allows the existence of a 10-metre-deep port, the Port of Rosario is subject to silting and must be dredged periodically. Exports include wheat, flour, hay, linseed and other oils, corn, sugar, lumber, meat, hides. Manufactured goods include flour, sugar, meat products, and other foodstuffs, the Rosario-Victoria Bridge, opened in 2004, spans the Paraná River, connecting Rosario with the city of Victoria, across the Paraná Delta. Because it plays a role in agricultural commerce, the city finds itself at the center of a continuing debate over taxes levied on big-ticket agricultural goods such as soy. Along with Paraná, Rosario is one of the few Argentine cities that cannot point to an individual as its founder. The citys patron is the Virgin of the Rosary, whose feast day is October 7, the asteroid 14812 Rosario was named in its honor. In 1689, captain Luis Romero de Pineda received part of the lands of the Pago de los Arroyos by royal decree, before that, the area was originally inhabited by Calchaquí tribes in reducciones, a kind of missions founded by Franciscans. These missions were attacked and destroyed by hostile tribes of the Chaco region. Romero de Pineda established the first permanent settlement, an estancia — intended as farmland, in 1719 the Jesuits bought another part and established Estancia San Miguel. The area was still so scarcely populated that it had no authority, it was ruled from the provincial capital. In 1724, another settlement was initiated by Santiago de Montenegro, who set up a mill, drew plans for the future town, built a chapel. The area of control of local government extended northward from todays Rosario
9.
Wetland
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A wetland is a land area that is saturated with water, either permanently or seasonally, such that it takes on the characteristics of a distinct ecosystem. The primary factor that distinguishes wetlands from other forms or water bodies is the characteristic vegetation of aquatic plants. Wetlands play a number of roles in the environment, principally water purification, flood control, carbon sink, Wetlands are also considered the most biologically diverse of all ecosystems, serving as home to a wide range of plant and animal life. Wetlands occur naturally on every continent except Antarctica, the largest including the Amazon River basin, the West Siberian Plain, the water found in wetlands can be freshwater, brackish, or saltwater. The main wetland types include swamps, marshes, bogs, and fens, and sub-types include mangrove, carr, pocosin, the UN Millennium Ecosystem Assessment determined that environmental degradation is more prominent within wetland systems than any other ecosystem on Earth. International conservation efforts are being used in conjunction with the development of rapid assessment tools to people about wetland issues. Constructed wetlands can be used to treat municipal and industrial wastewater as well as stormwater runoff and they may also play a role in water-sensitive urban design. A patch of land that develops pools of water after a storm would not be considered a wetland. Wetlands have unique characteristics, they are distinguished from other water bodies or landforms based on their water level. Specifically, wetlands are characterized as having a table that stands at or near the land surface for a long enough period each year to support aquatic plants. A more concise definition is a community composed of hydric soil, Wetlands have also been described as ecotones, providing a transition between dry land and water bodies. In environmental decision-making, there are subsets of definitions that are agreed upon to make regulatory and policy decisions. A wetland is an ecosystem that arises when inundation by water produces soils dominated by anaerobic processes, There are four main kinds of wetlands – marsh, swamp, bog and fen. Some experts also recognize wet meadows and aquatic ecosystems as additional wetland types, the largest wetlands in the world include the swamp forests of the Amazon and the peatlands of Siberia. Under the Ramsar international wetland conservation treaty, wetlands are defined as follows, Article 2.1, may incorporate riparian and coastal zones adjacent to the wetlands, and islands or bodies of marine water deeper than six metres at low tide lying within the wetlands. Although the general definition given above applies around the world, each county, Wetlands generally include swamps, marshes, bogs and similar areas. This definition has been used in the enforcement of the Clean Water Act, some US states, such as Massachusetts and New York, have separate definitions that may differ from the federal governments. It is not uncommon for a wetland to be dry for long portions of the growing season, the most important factor producing wetlands is flooding
10.
Sediment
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For sediment in beverages, see dregs. For example, sand and silt can be carried in suspension in water and on reaching the sea be deposited by sedimentation. Sediments are most often transported by water, but also wind, beach sands and river channel deposits are examples of fluvial transport and deposition, though sediment also often settles out of slow-moving or standing water in lakes and oceans. Desert sand dunes and loess are examples of transport and deposition. Glacial moraine deposits and till are ice-transported sediments, sediment can be classified based on its grain size and/or its composition. Sediment size is measured on a log base 2 scale, called the Phi scale, composition of sediment can be measured in terms of, parent rock lithology mineral composition chemical make-up. This leads to an ambiguity in which clay can be used as both a size-range and a composition, sediment is transported based on the strength of the flow that carries it and its own size, volume, density, and shape. Stronger flows will increase the lift and drag on the particle, causing it to rise, rivers and streams carry sediment in their flows. This sediment can be in a variety of locations within the flow and these relationships are shown in the following table for the Rouse number, which is a ratio of sediment fall velocity to upwards velocity. If the upwards velocity is less than the settling velocity, but still high enough for the sediment to move, it will move along the bed as bed load by rolling, sliding. If the upwards velocity is higher than the velocity, the sediment will be transported high in the flow as wash load. As there are generally a range of different particle sizes in the flow, sediment motion can create self-organized structures such as ripples, dunes, antidunes on the river or stream bed. These bedforms are often preserved in rocks and can be used to estimate the direction. Overland flow can erode soil particles and transport them downslope, the erosion associated with overland flow may occur through different methods depending on meteorological and flow conditions. If the initial impact of rain droplets dislodges soil, the phenomenon is called rainsplash erosion, if overland flow is directly responsible for sediment entrainment but does not form gullies, it is called sheet erosion. If the flow and the substrate permit channelization, gullies may form, glaciers carry a wide range of sediment sizes, and deposit it in moraines. The overall balance between sediment in transport and sediment being deposited on the bed is given by the Exner equation and this expression states that the rate of increase in bed elevation due to deposition is proportional to the amount of sediment that falls out of the flow. This can be localized, and simply due to obstacles, examples are scour holes behind boulders, where flow accelerates
