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Margorabbia
The Margorabbia is the river (Stream#Intermittent and ephemeral streams, intermittent stream) of Valtravaglia, a valley in the province of Varese, Lombardy, Italy. It is a tributary of the Tresa which it joins a few hundred metres upstream of Lake Maggiore. The source is near Valganna. After forming a number of small lakes, including Lago di Ganna and Lago di Ghirla, its course continues through the Lugano Prealps, Prealps of Varese until near Cunardo it is swallowed up by a system of caves: ''Pont Niv'', ''Antro dei Morti'', ''Grotte di Villa Radaelli'' and ''Grotte del Traforo''. It emerges from underground near Ferrera di Varese and runs through the crossing the valley’s comune, communes of Grantola, Mesenzana and Germignaga. A cycle path has recently been constructed along this part of the river. The torrent has many Tributary, affluents. The most important left side tributaries are the Rancina, the Boesio and the Gesone; from the right it receives the waters of the Bogg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tresa
The river Tresa leaves Lake Lugano at a point between Lavena Ponte Tresa in Italy and Ponte Tresa in Switzerland and flows into Lake Maggiore near Luino, a few hundred metres after joining the Margorabbia. At the outflow from Lake Lugano the river is crossed by a bridge which unites the Swiss and Italian parts of Ponte Tresa; a customs post divides them. The river is about long, and for most of its course marks the boundary between the Italian Province of Varese and the Swiss canton Ticino. It passes through the Swiss communes of Ponte Tresa, Croglio and Monteggio, and the Italian communes of Lavena Ponte Tresa, Cremenaga and Luino. A dam on the river, known as the Creva dam serves two purposes: to use the difference in elevation between the lakes to produce hydropower, and as far as possible to regulate the flow of water into Lake Maggiore in order to avoid or limit the dangers of flooding. External linksHydrological data of the Tresaat Ponte Tresa Ponte Tresa ( L ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lago Di Ganna
Lago di Ganna is a lake at Valganna in the Province of Varese, Lombardy, Italy. It has an area of 0,07 km² and a maximum depth of 3 m. It is part of a natural reserve. Geography It is located in the comune of Valganna. The lake has as an underground tributary the river Margorabbia, which than becomes an emissary that flows into the near Lago di Ghirla. It is entirely part of the frazione of ''Ganna'' and it's comprised in the Cinque Vette Park. History Between the XII and XIII centuries the benedictine monks changed the hydrography Hydrography is the branch of applied sciences which deals with the measurement and description of the physical features of oceans, seas, coastal areas, lakes and rivers, as well as with the prediction of their change over time, for the primary p ... through some reclamation works. In 1984 the lake became the center of the ''Natural Reserve of the Lake Ganna''. Fauna The population in Lake Ganna is mainly represented by pikes and tenche ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lago Di Ghirla
Lago di Ghirla is a lake at Valganna in the Province of Varese, Lombardy, Italy. Geography Ghirla Lake is at 442 metres above sea level. Its affluent is river Margorabbia which is a subterranean river coming from Lake Ganna. Its maximal depth is 14 m (46 ft). Its surface covers an area of 0,28 km2 Location The Ghirla Lake is located under comune of Valganna and the highway strada statale 233 varesina passes near his Eastern side. The Lake is also comprised in the Cinque Vette Park Climate The climate is continental because the lake is in a prealpine valley : temperatures go far below 0°C in winter and in summer the water temperature is about 20°C. History There are some important dates related to Lago di Ghirla: * 1898: the level of the lake was raised because of the construction of a dam which enabled the production of electrical energy thanks to a power station * 1914: the "Campionato Nazionale di pattinaggio di velocità", a national competition based on ic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Valganna
Valganna is a ''comune'' (municipality) within the Province of Varese in the Italian region Lombardy, located about 60 km northwest of Milan and about 13 km north of Varese. The name Valganna is a compound of valley and Ganna, which is the name of one of the villages located in the valley. Lago di Ghirla and Lago di Ganna are located in the territory of the municipality. Valganna borders the following municipalities: Arcisate, Bedero Valcuvia, Brinzio, Cuasso al Monte, Cugliate-Fabiasco, Cunardo, Induno Olona; the territory of the ''Comune'' is comprised in the Cinque Vette Park The Cinque Vette Park is a natural park, established by the Region of Lombardy on 19 June 2017. The park is located in the north-eastern part of the Province of Varese, in the Italian region of Lombardy. It takes the name from the main geographic .... References Cities and towns in Lombardy {{Varese-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mesenzana
Mesenzana is a ''comune'' (municipality) in the Province of Varese in the Italian region Lombardy, located about northwest of Milan and about northwest of Varese. As of 31 December 2004, it had a population of 1,318 and an area of .All demographics and other statistics: Italian statistical institute Istat. The municipality of Mesenzana contains the ''frazioni'' (subdivisions, mainly villages and hamlets) Malpensata, Molino d'Anna, Pezza, Maro, Cà Bianca nuova, Pianazzo, Piatta, Alpe Cavoglio, Gesiola del monte San Martino, and Le Cascine. Mesenzana borders the following municipalities: Brissago-Valtravaglia, Cassano Valcuvia, Duno, Grantola, Montegrino Valtravaglia Montegrino Valtravaglia is a ''comune'' (municipality) in the Province of Varese in the Italian region Lombardy, located about northwest of Milan and about west of Varese. Montegrino Valtravaglia borders the following municipalities: Brissago .... Demographic evolution Colors= id:lightgrey value:gray(0. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Piero Chiara
Piero Chiara (March 23, 1913 – December 31, 1986) was an Italian writer. He was born in Luino, on Lake Maggiore (northern Italy). His father Eugenio was from Resuttano, Sicily; his mother Virginia Maffei was from Comnago, a Piedmontese village in the municipality of Lesa. Sought by the Fascist militia during World War II, he fled to Switzerland in 1944. He returned to Italy two years later, starting his writing career. His most famous work is '' La stanza del vescovo'' of 1976, which was turned into a film by Dino Risi soon afterwards. He was married to Jula Sherb of Swiss origin.Corriere della Sera: "Marco Chiara, una vita tutta da raccontare" by Manzoni Franco 10 maggio 2011 They had one son ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dike (construction)
A levee (), dike ( American English), dyke ( Commonwealth English), embankment, floodbank, or stop bank is a structure that is usually earthen and that often runs parallel to the course of a river in its floodplain or along low-lying coastlines. The purpose of a levee is to keep the course of rivers from changing and to protect against flooding of the area adjoining the river or coast. Levees can be naturally occurring ridge structures that form next to the bank of a river, or be an artificially constructed fill or wall that regulates water levels. Ancient civilizations in the Indus Valley, ancient Egypt, Mesopotamia and China all built levees. Today, levees can be found around the world, and failures of levees due to erosion or other causes can be major disasters. Etymology Speakers of American English (notably in the Midwest and Deep South) use the word ''levee'', from the French word (from the feminine past participle of the French verb , 'to raise'). It ori ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Power Hammer
Power hammers are mechanical forging hammers that use an electrical power source or steam to raise the hammer preparatory to striking, and accelerate it onto the work being hammered. They are also called open die power forging hammers. They have been used by blacksmiths, bladesmiths, metalworkers, and manufacturers since the late 1880s, having replaced trip hammers. Design and operation A typical power hammer consists of a frame, an anvil, and a reciprocating ram holding a hammer head or die. The workpiece is placed on the lower anvil or die and the head or upper die strikes the workpiece. The power hammer is a direct descendant of the trip hammer, differing in that the power hammer stores potential energy in an arrangement of mechanical linkages and springs, in compressed air, or steam, and by the fact that it accelerates the ram on the downward stroke. This provides more force than simply allowing the weight to fall. Predecessors like trip hammers, steam drop hammers, b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Watermill
A watermill or water mill is a mill that uses hydropower. It is a structure that uses a water wheel or water turbine to drive a mechanical process such as milling (grinding), rolling, or hammering. Such processes are needed in the production of many material goods, including flour, lumber, paper, textiles, and many metal products. These watermills may comprise gristmills, sawmills, paper mills, textile mills, hammermills, trip hammering mills, rolling mills, wire drawing mills. One major way to classify watermills is by wheel orientation (vertical or horizontal), one powered by a vertical waterwheel through a gear mechanism, and the other equipped with a horizontal waterwheel without such a mechanism. The former type can be further divided, depending on where the water hits the wheel paddles, into undershot, overshot, breastshot and pitchback (backshot or reverse shot) waterwheel mills. Another way to classify water mills is by an essential trait about their location: tide mills ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Discharge (hydrology)
In hydrology, discharge is the volumetric flow rate of water that is transported through a given cross-sectional area. It includes any suspended solids (e.g. sediment), dissolved chemicals (e.g. CaCO3(aq)), or biologic material (e.g. diatoms) in addition to the water itself. Terms may vary between disciplines. For example, a fluvial hydrologist studying natural river systems may define discharge as streamflow, whereas an engineer operating a reservoir system may equate it with outflow, contrasted with inflow. Theory and calculation A discharge is a measure of the quantity of any fluid flow over unit time. The quantity may be either volume or mass. Thus the water discharge of a tap (faucet) can be measured with a measuring jug and a stopwatch. Here the discharge might be 1 litre per 15 seconds, equivalent to 67 ml/second or 4 litres/minute. This is an average measure. For measuring the discharge of a river we need a different method and the most common is the 'area-velocity' method. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Karst
Karst is a topography formed from the dissolution of soluble rocks such as limestone, dolomite, and gypsum. It is characterized by underground drainage systems with sinkholes and caves. It has also been documented for more weathering-resistant rocks, such as quartzite, given the right conditions. Subterranean drainage may limit surface water, with few to no rivers or lakes. However, in regions where the dissolved bedrock is covered (perhaps by debris) or confined by one or more superimposed non-soluble rock strata, distinctive karst features may occur only at subsurface levels and can be totally missing above ground. The study of ''paleokarst'' (buried karst in the stratigraphic column) is important in petroleum geology because as much as 50% of the world's hydrocarbon reserves are hosted in carbonate rock, and much of this is found in porous karst systems. Etymology The English word ''karst'' was borrowed from German in the late 19th century, which entered German much earlier ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Boesio
The Boesio is a river (intermittent stream) in Valcuvia, a valley in the north of the province of Varese, Lombardy, Italy. It rises near Cuveglio and flowing in an east–west direction before entering Lake Maggiore at Laveno-Mombello. The river's course takes it through the communes of Cuveglio, Cuvio, Casalzuigno, Azzio, Brenta, Gemonio, Cittiglio and Laveno-Mombello. The state road SS 394 follows in part the course of the river. Fish found in the river include Salmonidae and Cyprinidae, in particular brown trout and vairone (''Leuciscus souffia''). The waters of the river are polluted Pollution is the introduction of contaminants into the natural environment that cause adverse change. Pollution can take the form of any substance (solid, liquid, or gas) or energy (such as radioactivity, heat, sound, or light). Pollutants, the .... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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