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112-501: The construction began on the dam in 1974, and ended four years later in 1981. When the reservoir began in 1980, leakage was discovered downstream. The leakage is due to a karst foundation. The foundation was grouted from 1983 until 1989 with no success. With the population growth occurring in Amol, there was a need for more water and energy. The ideal place for the dam was over the Lar river, in

224-638: A branch of the Bourbons ascended to the throne of Sicily and Naples. During the Napoleonic Wars , north and central Italy were reorganised as Sister Republics of France and, later, as a Kingdom of Italy . The south was administered by Joachim Murat , Napoleon's brother-in-law. 1814's Congress of Vienna restored the situation of the late 18th century, but the ideals of the French Revolution could not be eradicated, and re-surfaced during

336-525: A crucially innovative role in financial development by devising banking practices, and enabling new forms of social organisation. In coastal and southern areas, maritime republics dominated the Mediterranean and monopolised trade to the Orient. They were independent thalassocratic city-states, in which merchants had considerable power. Although oligarchical, the relative political freedom they afforded

448-661: A distance of 3 kilometers from the Latyan Dam 's reservoir, through the 20 kilometer long Kalan tunnel (3 meters in size). After electricity generation, the water joins and feeds the Latyan dam's reservoir. The Kalan Power Station was commissioned in 1998 and the Lavarak in March 2012 and July 2013. Uncontrolled growth and expansion of Tehran created a situation where the existing water resources at Karaj , Latyan and Lar dams and

560-533: A famous meeting between Garibaldi and Victor Emmanuel II , the last king of Sardinia, during which Garibaldi shook Victor Emanuel's hand and hailed him as King of Italy . Cavour agreed to include Garibaldi's southern Italy in a union with the Kingdom of Sardinia in 1860. This allowed the Sardinian government to declare a united Italian kingdom on 17 March 1861, with Victor Emmanuel II as its first king. In 1865,

672-756: A member of NATO . The Marshall Plan revived the economy, which, until the late 1960s, enjoyed a period called the Economic Miracle . In the 1950s, Italy became a founding country of the European Communities , a forerunner of the European Union. From the late 1960s until the early 1980s, the country experienced the Years of Lead , characterised by economic difficulties, especially after the 1973 oil crisis ; social conflicts; and terrorist massacres. The economy recovered and Italy became

784-647: A permanent seat in the League of Nations 's executive council. The socialist agitations that followed the devastation of the Great War, inspired by the Russian Revolution , led to counter-revolution and repression throughout Italy. The liberal establishment, fearing a Soviet-style revolution, started to endorse the small National Fascist Party , led by Mussolini. In October 1922, the Blackshirts of

896-519: A pioneer of the study of karst in Slovenia and a fellow of the Royal Society , London, introduced the word karst to European scholars in 1689 to describe the phenomenon of underground flows of rivers in his account of Lake Cerknica . Jovan Cvijić greatly advanced the knowledge of karst regions to the point where he became known as the "father of karst geomorphology". Primarily discussing

1008-582: A proper noun, the Slovene form Grast was first attested in 1177. Ultimately, the word is of Mediterranean origin. It has also been suggested that the word may derive from the Proto-Indo-European root karra- 'rock'. The name may also be connected to the oronym Kar(u)sádios oros cited by Ptolemy , and perhaps also to Latin Carusardius . Johann Weikhard von Valvasor ,

1120-543: A revival of Italian republicanism. Italy became a republic after the 1946 Italian institutional referendum held on 2 June, a day celebrated since as Festa della Repubblica . This was the first time women voted nationally. Victor Emmanuel III's son, Umberto II , was forced to abdicate. The Republican Constitution was approved in 1948. Under the Treaty of Paris between Italy and the Allied Powers , areas next to

1232-734: A series of wars in the peninsula. During the High Renaissance , popes such as Julius II (1503–1513) fought for control of Italy against foreign monarchs; Paul III (1534–1549) preferred to mediate between the European powers to secure peace. In the middle of such conflicts, the Medici popes Leo X (1513–1521) and Clement VII (1523–1534) faced the Protestant Reformation in Germany, England and elsewhere. In 1559, at

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1344-628: A significant role in regional and global economic, military, cultural, and diplomatic affairs. Italy is a founding and leading member of the European Union, and is part of numerous international institutions, including NATO , the G7 and G20 , the Latin Union and the Union for the Mediterranean . As a cultural superpower , Italy has long been a renowned global centre of art , music , literature , cuisine , fashion , science and technology , and

1456-401: A sport than a science and so the underground karst caves and their associated watercourses were, from a scientific perspective, understudied. Karst is most strongly developed in dense carbonate rock , such as limestone, that is thinly bedded and highly fractured . Karst is not typically well developed in chalk , because chalk is highly porous rather than dense, so the flow of groundwater

1568-572: A variety of spatial and temporal scales in karst regions, with the purpose of understanding karst aquifers and ecosystems, and the development of the surface and underground structure, so that the environment can be protected and human activities planned effectively. Italy – in Europe  (light green & dark grey) – in the European Union  (light green)  –  [ Legend ] Italy , officially

1680-529: A well in a fracture trace or intersection of fracture traces increases the likelihood to encounter good water production. Voids in karst aquifers can be large enough to cause destructive collapse or subsidence of the ground surface that can initiate a catastrophic release of contaminants. Groundwater flow rate in karst aquifers is much more rapid than in porous aquifers. For example, in the Barton Springs Edwards aquifer, dye traces measured

1792-505: Is a UNESCO World Heritage Site. Many karst-related terms derive from South Slavic languages , entering scientific vocabulary through early research in the Western Balkan Dinaric Alpine karst. The study of the various aspects of karst regions is called karstology. This includes biological, chemical, ecological, geomorphological, hydrogeological, hydrological, political, socio-economical, and other processes over

1904-562: Is a development of karst observed in geological history and preserved within the rock sequence, effectively a fossil karst. There are for example palaeokarst surfaces exposed within the Clydach Valley Subgroup of the Carboniferous Limestone sequence of South Wales which developed as sub-aerial weathering of recently formed limestones took place during periods of non-deposition within the early part of

2016-538: Is a karst landscape which is developed beneath a cover of insoluble rocks. Typically this will involve a cover of sandstone overlying limestone strata undergoing solution. In the United Kingdom for example extensive doline fields have developed at Cefn yr Ystrad , Mynydd Llangatwg and Mynydd Llangynidr in South Wales across a cover of Twrch Sandstone which overlies concealed Carboniferous Limestone ,

2128-468: Is developed in areas where salt is undergoing solution underground. It can lead to surface depressions and collapses which present a geo-hazard. Karst areas tend to have unique types of forests. The karst terrain is difficult for humans to traverse, so that their ecosystems are often relatively undisturbed. The soil tends to have a high pH, which encourages growth of unusual species of orchids, palms, mangroves, and other plants. Paleokarst or palaeokarst

2240-584: Is first transferred to the Kalan Power Station ( 35°48′24.87″N 51°47′29.46″E  /  35.8069083°N 51.7915167°E  / 35.8069083; 51.7915167  ( Kalan Hydroelectric Power Station ) ) then to the Lavark Power Station ( 35°48′34.97″N 51°44′54.67″E  /  35.8097139°N 51.7485194°E  / 35.8097139; 51.7485194  ( Lavarak Hydroelectric Power Station ) ),

2352-636: Is frequently unseen until the roof of a cavern suddenly collapses. Such events have swallowed homes, cattle, cars, and farm machinery. In the United States, sudden collapse of such a cavern-sinkhole swallowed part of the collection of the National Corvette Museum in Bowling Green, Kentucky in 2014. The world's largest limestone karst is Australia's Nullarbor Plain . Slovenia has the world's highest risk of sinkholes, while

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2464-407: 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. The English word karst was borrowed from German Karst in the late 19th century, which entered German usage much earlier, to describe a number of geological, geomorphological, and hydrological features found within

2576-478: Is influenced by the seas that surround Italy on every side except the north, which constitute a reservoir of heat and humidity. Within the southern temperate zone, they determine a Mediterranean climate with local differences. Because of the length of the peninsula and the mostly mountainous hinterland, the climate is highly diverse. In most inland northern and central regions, the climate ranges from humid subtropical to humid continental and oceanic . The Po Valley

2688-599: Is mostly humid subtropical, with cool winters and hot summers. The coastal areas of Liguria , Tuscany, and most of the south generally fit the Mediterranean climate stereotype, as in the Köppen climate classification . Conditions on the coast are different from those in the interior, particularly during winter when the higher altitudes tend to be cold, wet, and often snowy. The coastal regions have mild winters, and hot and generally dry summers; lowland valleys are hot in summer. Winter temperatures vary from 0 °C (32 °F) in

2800-399: Is not concentrated along fractures. Karst is also most strongly developed where the water table is relatively low, such as in uplands with entrenched valleys , and where rainfall is moderate to heavy. This contributes to rapid downward movement of groundwater, which promotes dissolution of the bedrock, whereas standing groundwater becomes saturated with carbonate minerals and ceases to dissolve

2912-621: Is the following: In very rare conditions, oxidation can play a role. Oxidation played a major role in the formation of ancient Lechuguilla Cave in the US state of New Mexico and is presently active in the Frasassi Caves of Italy. The oxidation of sulfides leading to the formation of sulfuric acid can also be one of the corrosion factors in karst formation. As oxygen (O 2 )-rich surface waters seep into deep anoxic karst systems, they bring oxygen, which reacts with sulfide present in

3024-697: Is water. Including the islands, Italy has a coastline of 7,600 kilometres (4,722 miles) on the Mediterranean Sea , the Ligurian and Tyrrhenian seas, the Ionian Sea , and the Adriatic Sea . Its border with France runs for 488 km (303 mi); Switzerland, 740 km (460 mi); Austria, 430 km (267 mi); and Slovenia, 232 km (144 mi). The sovereign states of San Marino and Vatican City (the smallest country in

3136-670: The Oration on the Dignity of Man , considered the manifesto of the Renaissance. In the arts, the Italian Renaissance exercised a dominant influence on European art for centuries, with artists such as Leonardo da Vinci , Botticelli , Michelangelo , Raphael , Giotto , Donatello , and Titian , and architects such as Filippo Brunelleschi , Andrea Palladio , and Donato Bramante . Italian explorers and navigators from

3248-678: The Achaeans founded various cities. Greek colonisation placed the Italic peoples in contact with democratic forms of government and high artistic and cultural expressions. Ancient Rome, a settlement on the river Tiber in central Italy, founded in 753 BC, was ruled for 244 years by a monarchical system. In 509 BC, the Romans, favouring a government of the Senate and the People ( SPQR ), expelled

3360-622: The Adriatic Sea were annexed by Yugoslavia , resulting in the Istrian-Dalmatian exodus , which involved the emigration of around 300,000 Istrian and Dalmatian Italians . Italy lost all colonial possessions, ending the Italian Empire . Fears of a Communist takeover proved crucial in 1948 , when the Christian Democrats , under Alcide De Gasperi , won a landslide victory. Consequently, in 1949 Italy became

3472-489: The Clean Hands investigation—demanded radical reform. The Christian Democrats, who had ruled for almost 50 years, underwent a crisis and disbanded, splitting into factions. The Communists reorganised as a social-democratic force. During the 1990s and 2000s, centre-right (dominated by media magnate Silvio Berlusconi ) and centre-left coalitions (led by professor Romano Prodi ) alternately governed. In 2011, amidst

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3584-831: The Crimean War . Sardinia fought the Austrian Empire in the Second Italian War of Independence of 1859, with the aid of France, resulting in liberating Lombardy . On the basis of the Plombières Agreement , the Sardinia ceded Savoy and Nice to France, an event that caused the Niçard exodus . In 1860–1861, Garibaldi led the drive for unification in Naples and Sicily. Teano was the site of

3696-660: The Crusades , providing support, transport, but mostly taking political and trading opportunities. Italy first felt the economic changes which led to the commercial revolution : Venice was able to sack Byzantine's capital and finance Marco Polo 's voyages to Asia; the first universities were formed in Italian cities, and scholars such as Aquinas obtained international fame; capitalism and banking families emerged in Florence, where Dante and Giotto were active around 1300. In

3808-851: The Empire of Japan , and strongly supported Francisco Franco in the Spanish Civil War . In 1939, Italy annexed Albania . Italy entered World War II on 10 June 1940. At different times, Italians advanced in British Somaliland , Egypt , the Balkans , and eastern fronts. They were, however, defeated on the Eastern Front as well as in the East African and North African campaigns, losing their territories in Africa and

3920-548: The Great Recession , Berlusconi resigned and was replaced by the technocratic cabinet of Mario Monti . In 2014, Matteo Renzi became prime minister and the government started constitutional reform. This was rejected in a 2016 referendum and Paolo Gentiloni became prime minister. During the European migrant crisis of the 2010s, Italy was the entry point and leading destination for most asylum seekers entering

4032-901: The Gregorian calendar ; the Jesuit China mission ; the French Wars of Religion ; end of the Thirty Years' War (1618–1648); and the Great Turkish War . The Italian economy declined in the 1600s and 1700s. During the war of the Spanish succession (1700–1714), Austria acquired most of the Spanish domains in Italy, namely Milan, Naples and Sardinia; the latter was given to the House of Savoy in exchange for Sicily in 1720. Later,

4144-507: The House of Savoy to establish a united kingdom encompassing the entire Italian Peninsula . By the mid-19th century, rising Italian nationalism led to revolution. Following the Congress of Vienna in 1815, the political and social Italian unification movement, or Risorgimento , emerged to unite Italy by consolidating the states and liberating them from foreign control. A radical figure was

4256-666: The Italian Peninsula , Sicily and Sardinia (the biggest islands of the Mediterranean), and many smaller islands . Some of Italy's territory extends beyond the Alpine basin, and some islands are located outside the Eurasian continental shelf. The country's area is 301,230 square kilometres (116,306 sq mi), of which 294,020 km (113,522 sq mi) is land and 7,210 km (2,784 sq mi)

4368-525: The Italian Republic , is a country in Southern and Western Europe . It consists of a peninsula that extends into the Mediterranean Sea , with the Alps on its northern land border, as well as nearly 800 islands, notably Sicily and Sardinia . Italy shares its borders with France, Switzerland, Austria, Slovenia, and two enclaves: Vatican City and San Marino . It is the tenth-largest country in Europe by area, covering 301,340 km (116,350 sq mi), and third-most populous member state of

4480-418: The Italic peoples . The main historic peoples of possible non-Indo-European or pre-Indo-European heritage include the Etruscans , the Elymians and Sicani of Sicily, and the prehistoric Sardinians , who gave birth to the Nuragic civilisation . Other ancient populations include the Rhaetian people and Camunni , known for their rock drawings in Valcamonica . A natural mummy, Ötzi , dated 3400–3100 BC,

4592-461: The Kvarner Gulf , and the Dalmatian city of Zara . The subsequent Treaty of Rome (1924) led to annexation of Fiume by Italy. Italy did not receive other territories promised by the Treaty of London, so this outcome was denounced as a " mutilated victory ", by Benito Mussolini , which helped lead to the rise of Italian fascism . Historians regard "mutilated victory" as a "political myth", used by fascists to fuel Italian imperialism . Italy gained

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4704-408: The Middle East . In the wake of Julius Caesar 's assassination in 44 BC, Rome grew into a massive empire stretching from Britain to the borders of Persia , engulfing the whole Mediterranean basin, in which Greek, Roman, and other cultures merged into a powerful civilisation. The long reign of the first emperor, Augustus , began an age of peace and prosperity. Roman Italy remained the metropole of

4816-479: The National Republican Army . German troops, with RSI collaboration, committed massacres and deported thousands of Jews to death camps. The post-armistice period saw the emergence of the Italian Resistance , who fought a guerrilla war against the Nazi German occupiers and collaborators. This has been described as an Italian civil war due to fighting between partisans and fascist RSI forces. In April 1945, with defeat looming, Mussolini attempted to escape north, but

4928-445: The Norse ; and Amerigo Vespucci , for whom the continent of America is named. A defensive alliance known as the Italic League was formed between Venice, Naples, Florence, Milan, and the Papacy. Lorenzo the Magnificent de Medici was the Renaissance's greatest patron, his support allowed the League to abort invasion by the Turks. The alliance, however, collapsed in the 1490s; the invasion of Charles VIII of France initiated

5040-482: The Roman Empire . With the spread of Christianity, Rome became the seat of the Catholic Church and the Papacy . Between late antiquity and the Early Middle Ages , Italy experienced the arrival of Germanic tribes and the fall of the Western Roman Empire . By the 11th century, Italian city-states and maritime republics expanded, bringing renewed prosperity through commerce and laying the groundwork for modern capitalism. The Italian Renaissance flourished during

5152-405: The collapse of the Fascist regime on 25 July. Mussolini was deposed and arrested by order of King Victor Emmanuel III. On 8 September, Italy signed the Armistice of Cassibile , ending its war with the Allies. The Germans, with the assistance of Italian fascists, succeeded in taking control of north and central Italy. The country remained a battlefield, with the Allies moving up from the south. In

5264-412: The eponymous geographical region , is located in Southern Europe (and is also considered part of Western Europe ) between latitudes 35° and 47° N , and longitudes 6° and 19° E . To the north, from west to east, Italy borders France, Switzerland, Austria, and Slovenia, and is roughly delimited by the Alpine watershed , enclosing the Po Valley and the Venetian Plain . It consists of the entirety of

5376-437: The political upheavals that characterised the early 19th century. The first adoption of the Italian tricolour by an Italian state, the Cispadane Republic , occurred during Napoleonic Italy , following the French Revolution, which advocated national self-determination . This event is celebrated by Tricolour Day . The birth of the Kingdom of Italy was the result of efforts of Italian nationalists and monarchists loyal to

5488-524: The range of the Dinaric Alps , stretching from the northeastern corner of Italy above the city of Trieste , across the Balkan peninsula along the coast of the eastern Adriatic to Kosovo and North Macedonia , where the massif of the Šar Mountains begins. The karst zone is at the northwesternmost section, described in early topographical research as a plateau between Italy and Slovenia . Languages preserving this form include Italian : Carso , German : Karst , and Albanian : karsti . In

5600-401: The 1400s and 1500s, Italy was the birthplace and heart of the Renaissance . This era marked the transition from the medieval period to the modern age and was fostered by the wealth accumulated by merchant cities and the patronage of dominant families. Italian polities were now regional states effectively ruled by princes, in control of trade and administration, and their courts became centres of

5712-414: The 15th and 16th centuries and spread to the rest of Europe. Italian explorers discovered new routes to the Far East and the New World , contributing significantly to the European Age of Discovery . After centuries of political and territorial divisions, Italy was almost entirely unified in 1861, following wars of independence and the Expedition of the Thousand , establishing the Kingdom of Italy . From

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5824-500: The Adriatic or Tyrrhenian Sea. The longest is the Po , which flows from the Alps on the western border, and crosses the Padan plain to the Adriatic. The Po Valley is the largest plain, with 46,000 km (18,000 sq mi), and contains over 70% of the country's lowlands . The largest lakes are, in descending size: Garda (367.94 km or 142 sq mi), Maggiore (212.51 km or 82 sq mi), and Como (145.9 km or 56 sq mi). The climate

5936-567: The Alps form most of its northern boundary, where Italy's highest point is located on the summit of Mont Blanc ( Monte Bianco ) at 4,810 m (15,780 ft). Other well-known mountains include the Matterhorn ( Monte Cervino ) in the western Alps, and the Dolomites in the eastern Alps. Many parts of Italy are of volcanic origin . Most small islands and archipelagos in the south are volcanic islands . There are active volcanoes: Mount Etna in Sicily (the largest in Europe), Vulcano , Stromboli , and Vesuvius . Most rivers of Italy drain into

6048-403: The Balkans. Italian war crimes included extrajudicial killings and ethnic cleansing by deportation of about 25,000 people—mainly Yugoslavs—to Italian concentration camps and elsewhere. Yugoslav Partisans perpetrated their own crimes against the ethnic Italian population during and after the war, including the foibe massacres . An Allied invasion of Sicily began in July 1943, leading to

6160-449: The Church and new political dynasties. In 1453, despite activity by Pope Nicholas V to support the Byzantines, the city of Constantinople fell to the Ottomans . This led to the migration of Greek scholars and texts to Italy, fuelling the rediscovery of Greek humanism . Humanist rulers such as Federico da Montefeltro and Pope Pius II worked to establish ideal cities , founding Urbino and Pienza . Pico della Mirandola wrote

6272-434: The EU. Between 2013 and 2018, it took in over 700,000 migrants, mainly from sub-Saharan Africa, which put a strain on the public purse and led to a surge in support for far-right or euro-sceptic parties. After the 2018 general election , Giuseppe Conte became prime minister of a populist coalition . With more than 155,000 victims, Italy was one of the countries with the most deaths in the COVID-19 pandemic and one of

6384-427: The European Union , with a population of nearly 60 million. Italy's capital and largest city is Rome ; other major urban areas include Milan , Naples , Turin , Palermo , Bologna , Florence , Genoa , and Venice . The history of Italy goes back to numerous Italic peoples , notably including the ancient Romans , who conquered the Mediterranean world during the Roman Republic and ruled it for centuries during

6496-461: The First World War in 1915 with the aim of completing national unity, so it is also considered the Fourth Italian War of Independence, from a historiographical perspective, as the conclusion of the unification of Italy . Italy, nominally allied with German and the Austro-Hungarian empires in the Triple Alliance , in 1915 joined the Allies , entering World War I with a promise of substantial territorial gains that included west Inner Carniola ,

6608-423: The Italian Front, secured dissolution of the Austro-Hungarian Empire, and was instrumental in ending the war less than two weeks later. During the war, more than 650,000 Italian soldiers and as many civilians died, and the kingdom was on the brink of bankruptcy. The Treaty of Saint-Germain-en-Laye (1919) and Treaty of Rapallo (1920) allowed for annexation of Trentino Alto-Adige , the Julian March , Istria ,

6720-452: The National Fascist Party organised a mass demonstration and the " March on Rome " coup . King Victor Emmanuel III appointed Mussolini as prime minister, transferring power to the fascists without armed conflict. Mussolini banned political parties and curtailed personal liberties, establishing a dictatorship. These actions attracted international attention and inspired similar dictatorships in Nazi Germany and Francoist Spain . Fascism

6832-565: The Papacy, with city-states siding with the former ( Ghibellines ) or with the latter ( Guelphs ) for momentary advantage. The Germanic emperor and Roman pontiff became the universal powers of medieval Europe. However, conflict over the Investiture Controversy and between Guelphs and Ghibellines ended the imperial-feudal system in the north, where cities gained independence. In 1176, the Lombard League of city-states, defeated Holy Roman Emperor Frederick Barbarossa , ensuring their independence. City-states—e.g. Milan , Florence, Venice —played

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6944-510: The Roman Republic's expansion, the name was used by Greeks for the land between the strait of Messina and the line connecting the gulfs of Salerno and Taranto , corresponding to Calabria. The Greeks came to apply "Italia" to a larger region. In addition to the " Greek Italy " in the south, historians have suggested the existence of an "Etruscan Italy", which consisted of areas of central Italy. The borders of Roman Italy , Italia , are better established. Cato's Origines describes Italy as

7056-402: The arts and sciences. These princedoms were led by political dynasties and merchant families, such as the Medici of Florence. After the end of the Western Schism , newly elected Pope Martin V returned to the Papal States and restored Italy as the sole centre of Western Christianity. The Medici Bank was made the credit institution of the Papacy, and significant ties were established between

7168-511: The bedrock. The carbonic acid that causes karst features is formed as rain passes through Earth's atmosphere picking up carbon dioxide (CO 2 ), which readily dissolves in the water. Once the rain reaches the ground, it may pass through soil that provides additional CO 2 produced by soil respiration . Some of the dissolved carbon dioxide reacts with the water to form a weak carbonic acid solution, which dissolves calcium carbonate . The primary reaction sequence in limestone dissolution

7280-412: The calf ( Latin : vitulus ; Umbrian : vitlo ; Oscan : Víteliú ). Several ancient authors said it was named after a local ruler Italus . The ancient Greek term for Italy initially referred only to the south of the Bruttium peninsula and parts of Catanzaro and Vibo Valentia . The larger concept of Oenotria and "Italy" became synonymous, and the name applied to most of Lucania as well. Before

7392-492: The city. The lake is 84 km northeast of Tehran . Dams in Iran Download coordinates as: Karst Karst ( / k ɑːr s t / ) is a topography formed from the dissolution of soluble carbonate rocks such as limestone and dolomite . It is characterized by features like poljes above and drainage systems with sinkholes and caves underground. There is some evidence that karst may occur in more weathering -resistant rocks such as quartzite given

7504-450: The complexity of karst aquifers, and need to be supplemented with dye traces , measurement of spring discharges, and analysis of water chemistry. U.S. Geological Survey dye tracing has determined that conventional groundwater models that assume a uniform distribution of porosity are not applicable for karst aquifers. Linear alignment of surface features such as straight stream segments and sinkholes develop along fracture traces . Locating

7616-489: The deep wells which were supposed to be exploited only in the during the peak water consumption period. These were no longer capable of meeting the city's water demand, so inevitable abstraction from ground resources started to increase in a manner that at the present situation, the quantity of drilled deep wells has amounted to 230 rings. In fact, from 1997-2000, it had been orderly abstracted, 317, 289, 374 and 357 MCM ( million cubic metres ) of water from groundwater resources of

7728-444: The emergence of Christianity as a world religion, are among the many legacies of Roman dominance. After the fall of the Western Roman Empire , Italy fell under the Odoacer's kingdom , and was seized by the Ostrogoths . Invasions resulted in a chaotic succession of kingdoms and the supposed " Dark Ages ". The invasion of another Germanic tribe in the 6th century, the Lombards, reduced Byzantine presence and ended political unity of

7840-446: The empire, homeland of the Romans and territory of the capital. As Roman provinces were being established throughout the Mediterranean, Italy maintained a special status which made it domina provinciarum ('ruler of the provinces'), and—especially in relation to the first centuries of imperial stability — rectrix mundi ('governor of the world') and omnium terrarum parens ('parent of all lands'). The Roman Empire

7952-424: The end of the Italian wars between France and the Habsburgs, about half of Italy (the southern Kingdoms of Naples , Sicily , Sardinia , and the Duchy of Milan ) was under Spanish rule, while the other half remained independent (many states continued to be formally part of the Holy Roman Empire). The Papacy launched the Counter-Reformation , whose key events include: the Council of Trent (1545–1563); adoption of

8064-610: The entire peninsula south of the Alps. In 264 BC, Roman Italy extended from the Arno and Rubicon rivers of the centre-north to the entire south. The northern area, Cisalpine Gaul , considered geographically part of Italy, was occupied by Rome in the 220s BC, but remained politically separated. It was legally merged into the administrative unit of Italy in 42 BC. Sardinia, Corsica , Sicily, and Malta were added to Italy by Diocletian in 292 AD, which made late-ancient Italy coterminous with

8176-557: The fissures. The enlarged fissures allow a larger quantity of water to enter which leads to a progressive enlargement of openings. Abundant small openings store a large quantity of water. The larger openings form a conduit system that drains the aquifer to springs. Characterization of karst aquifers requires field exploration to locate sinkholes, swallets , sinking streams , and springs in addition to studying geologic maps . Conventional hydrogeologic methods such as aquifer tests and potentiometric mapping are insufficient to characterize

8288-635: The former Austrian Littoral , and Dalmatia , as well as parts of the Ottoman Empire . The country's contribution to the Allied victory earned it a place as one of the " Big Four " powers. Reorganisation of the army and conscription led to Italian victories. In October 1918, the Italians launched a massive offensive, culminating in victory at the Battle of Vittorio Veneto . This marked the end of war on

8400-466: The global demand for drinkable water. Farming in karst areas must take into account the lack of surface water. The soils may be fertile enough, and rainfall may be adequate, but rainwater quickly moves through the crevices into the ground, sometimes leaving the surface soil parched between rains. The karst topography also poses peculiar difficulties for human inhabitants. Sinkholes can develop gradually as surface openings enlarge, but progressive erosion

8512-456: The karst groundwater flow rates from 0.5 to 7 miles per day (0.8 to 11.3 km/d). The rapid groundwater flow rates make karst aquifers much more sensitive to groundwater contamination than porous aquifers. Groundwater in karst areas is also just as easily polluted as surface streams, because Karst formations are cavernous and highly permeable, resulting in reduced opportunity for contaminant filtration. Well water may also be unsafe as

8624-534: The karst regions of the Balkans, Cvijić's 1893 publication Das Karstphänomen describes landforms such as karren, dolines and poljes . In a 1918 publication, Cvijić proposed a cyclical model for karst landscape development. Karst hydrology emerged as a discipline in the late 1950s and the early 1960s in France. Previously, the activities of cave explorers, called speleologists , had been dismissed as more of

8736-703: The kingdom's capital was moved from Turin to Florence. In 1866, Victor Emmanuel II, allied with Prussia during the Austro-Prussian War , waged the Third Italian War of Independence , which resulted in Italy annexing Venetia . Finally, in 1870, as France abandoned Rome during the Franco-Prussian War , the Italians captured the Papal States , unification was completed, and the capital moved to Rome. Sardinia's constitution

8848-562: The last-named locality having been declared a site of special scientific interest in respect of it. Kegelkarst is a type of tropical karst terrain with numerous cone-like hills, formed by cockpits, mogotes , and poljes and without strong fluvial erosion processes. This terrain is found in Cuba, Jamaica, Indonesia, Malaysia, the Philippines, Puerto Rico, southern China, Myanmar, Thailand, Laos and Vietnam. Salt karst (or 'halite karst')

8960-704: The late 19th to the early 20th century, Italy rapidly industrialised, mainly in the north, and acquired a colonial empire , while the south remained largely impoverished, fueling a large immigrant diaspora to the Americas. From 1915 to 1918, Italy took part in World War I with the Entente against the Central Powers . In 1922, the Italian fascist dictatorship was established. During World War II , Italy

9072-412: The local South Slavic languages , all variations of the word are derived from a Romanized Illyrian base (yielding Latin : carsus , Dalmatian : carsus ), later metathesized from the reconstructed form * korsъ into forms such as Slovene : kras and Serbo-Croatian : krš , kras , first attested in the 18th century, and the adjective form kraški in the 16th century. As

9184-564: The maritime republics, eager to find an alternative route to the Indies to bypass the Ottomans, offered their services to monarchs of Atlantic countries and played a key role in ushering the Age of Discovery and colonization of the Americas. The most notable were: Christopher Columbus , who opened the Americas for conquest by Europeans; John Cabot , the first European to explore North America since

9296-661: The modern Italian geographical region . The Latin Italicus was used to describe "a man of Italy" as opposed to a provincial , or one from the Roman province . The adjective italianus , from which Italian was derived, is from medieval Latin and was used alternatively with Italicus during the early modern period . After the fall of the Western Roman Empire , the Ostrogothic Kingdom of Italy

9408-420: The monarchy and established an oligarchic republic. The Italian Peninsula, named Italia , was consolidated into a unified entity during Roman expansion, the conquest of new territories often at the expense of the other Italic tribes , Etruscans , Celts , and Greeks . A permanent association, with most of the local tribes and cities, was formed, and Rome began the conquest of Western Europe, North Africa, and

9520-519: The most affected economically . In February 2021, after a government crisis , Conte resigned. Mario Draghi , former president of the European Central Bank , formed a national unity government supported by most main parties, pledging to implement an economic stimulus to face the crisis caused by the pandemic. In 2022, Giorgia Meloni was sworn in as Italy's first female prime minister. Italy, whose territory largely coincides with

9632-647: The most dramatic of these formations can be seen in Thailand 's Phangnga Bay and at Halong Bay in Vietnam . Calcium carbonate dissolved into water may precipitate out where the water discharges some of its dissolved carbon dioxide. Rivers which emerge from springs may produce tufa terraces, consisting of layers of calcite deposited over extended periods of time. In caves, a variety of features collectively called speleothems are formed by deposition of calcium carbonate and other dissolved minerals. Interstratal karst

9744-676: The north, the Germans set up the Italian Social Republic (RSI), a Nazi puppet state and collaborationist regime with Mussolini installed as leader after he was rescued by German paratroopers. What remained of the Italian troops was organised into the Italian Co-belligerent Army , which fought alongside the Allies, while other Italian forces, loyal to Mussolini, opted to fight alongside the Germans in

9856-473: The northeast section of the city, at the elevated heights of the Kalanbasteh mountain on the slope of Mount Damavand. The area is called Polour, and operations began in 1984. One of the aims for building the Lar dam was to supply part of Amol with drinking water; it was not possible initially to operate the dam at its nominal capacity, because of a water seepage problem. Water stored in the dam's reservoir

9968-399: The patriotic journalist Giuseppe Mazzini , founder of the political movement Young Italy in the 1830s, who favoured a unitary republic and advocated a broad nationalist movement. 1847 saw the first public performance of " Il Canto degli Italiani ", which became the national anthem in 1946. The most famous member of Young Italy was the revolutionary and general Giuseppe Garibaldi who led

10080-647: The peninsula. The north formed the Lombard kingdom, central-south was also controlled by the Lombards, and other parts remained Byzantine. The Lombard kingdom was absorbed into Francia by Charlemagne in the late 8th century and became the Kingdom of Italy. The Franks helped form the Papal States . Until the 13th century, politics was dominated by relations between the Holy Roman Emperors and

10192-709: The period. Sedimentation resumed and further limestone strata were deposited on an irregular karst surface, the cycle recurring several times in connection with fluctuating sea levels over prolonged periods. Pseudokarsts are similar in form or appearance to karst features but are created by different mechanisms. Examples include lava caves and granite tors —for example, Labertouche Cave in Victoria, Australia —and paleocollapse features. Mud Caves are an example of pseudokarst. Karst formations have unique hydrology, resulting in many unusual features. A karst fenster (karst window) occurs when an underground stream emerges onto

10304-523: The republican drive for unification in southern Italy. However, the Italian monarchy of the House of Savoy, in the Kingdom of Sardinia , whose government was led by Camillo Benso, Count of Cavour , also had ambitions of establishing a united Italian state. In the context of the 1848 liberal revolutions that swept Europe, an unsuccessful First Italian War of Independence was declared against Austria . In 1855, Sardinia became an ally of Britain and France in

10416-418: The right conditions. Subterranean drainage may limit surface water, with few to no rivers or lakes. 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 )

10528-780: The river flows into a cave in a formation known as the Madison Limestone and then rises again 800 m ( 1 ⁄ 2  mi) down the canyon in a placid pool. A turlough is a unique type of seasonal lake found in Irish karst areas which are formed through the annual welling-up of water from the underground water system. Main Article Aquifer#Karst Karst aquifers typically develop in limestone . Surface water containing natural carbonic acid moves down into small fissures in limestone. This carbonic acid gradually dissolves limestone thereby enlarging

10640-526: The source of multiple inventions and discoveries . It has the highest number of World Heritage Sites ( 60 ) and is the fifth-most visited country in the world. Hypotheses for the etymology of Italia are numerous. One theory suggests it originated from an Ancient Greek term for the land of the Italói , a tribe that resided in the region now known as Calabria . Originally thought to be named Vituli , some scholars suggest their totemic animal to be

10752-470: The south, Sicily had become an Arab Islamic emirate in the 9th century, thriving until the Italo-Normans conquered it in the late 11th century, together with most of the Lombard and Byzantine principalities of southern Italy. The region was subsequently divided between the Kingdom of Sicily and Kingdom of Naples . The Black Death of 1348 killed perhaps a third of Italy's population. During

10864-649: The surface between layers of rock, cascades some distance, and then disappears back down, often into a sinkhole. Rivers in karst areas may disappear underground a number of times and spring up again in different places, even under a different name, like Ljubljanica , the "river of seven names". Another example of this is the Popo Agie River in Fremont County, Wyoming , where, at a site named "The Sinks" in Sinks Canyon State Park ,

10976-415: The surface, complex underground drainage systems (such as karst aquifers ) and extensive caves and cavern systems may form. Erosion along limestone shores, notably in the tropics , produces karst topography that includes a sharp makatea surface above the normal reach of the sea, and undercuts that are mostly the result of biological activity or bioerosion at or a little above mean sea level . Some of

11088-1002: The system ( pyrite or hydrogen sulfide ) to form sulfuric acid (H 2 SO 4 ). Sulfuric acid then reacts with calcium carbonate, causing increased erosion within the limestone formation. This chain of reactions is: This reaction chain forms gypsum . The karstification of a landscape may result in a variety of large- or small-scale features both on the surface and beneath. On exposed surfaces, small features may include solution flutes (or rillenkarren), runnels , limestone pavement (clints and grikes), kamenitzas collectively called karren or lapiez. Medium-sized surface features may include sinkholes or cenotes (closed basins), vertical shafts, foibe (inverted funnel shaped sinkholes), disappearing streams, and reappearing springs . Large-scale features may include limestone pavements , poljes , and karst valleys. Mature karst landscapes, where more bedrock has been removed than remains, may result in karst towers , or haystack/eggbox landscapes. Beneath

11200-405: The traditional liberal and conservative establishment. In the last two decades of the 19th century, Italy developed into a colonial power by subjugating Eritrea , Somalia , Tripolitania , and Cyrenaica in Africa. In 1913, male universal suffrage was adopted. The pre- World War I period was dominated by Giovanni Giolitti , prime minister five times between 1892 and 1921. Italy entered into

11312-461: The water may have run unimpeded from a sinkhole in a cattle pasture, bypassing the normal filtering that occurs in a porous aquifer . Sinkholes have often been used as farmstead or community trash dumps . Overloaded or malfunctioning septic tanks in karst landscapes may dump raw sewage directly into underground channels. Geologists are concerned with these negative effects of human activity on karst hydrology which, as of 2007 , supplied about 25% of

11424-515: The western Highland Rim in the eastern United States is at the second-highest risk of karst sinkholes. In Canada, Wood Buffalo National Park , Northwest Territories contains areas of karst sinkholes. Mexico hosts important karst regions in the Yucatán Peninsula and Chiapas . The West of Ireland is home to The Burren , a karst limestone area. The South China Karst in the provinces of Guizhou , Guangxi , and Yunnan provinces

11536-534: The world and headquarters of the worldwide Catholic Church under the governance of the Holy See ) are enclaves within Italy, while Campione d'Italia is an Italian exclave in Switzerland. The border with San Marino is 39 km (24 mi) long, that with Vatican City, 3.2 km (2.0 mi). Over 35% of Italian territory is mountainous. The Apennine Mountains form the peninsula's backbone, and

11648-463: The world's fifth-largest industrial nation after it gained entry into the G7 in the 1970s. However, national debt skyrocketed past 100% of GDP. Between 1992 and 1993, Italy faced terror attacks perpetrated by the Sicilian Mafia as a consequence of new anti-mafia measures by the government. Voters—disenchanted with political paralysis, massive public debt and extensive corruption uncovered by

11760-422: Was among the largest in history, wielding great economical, cultural, political, and military power. At its greatest extent, it had an area of 5 million square kilometres (1.9 million square miles). The Roman legacy has deeply influenced Western civilisation shaping the modern world. The widespread use of Romance languages derived from Latin, numerical system , modern Western alphabet and calendar, and

11872-510: Was based upon Italian nationalism and imperialism, seeking to expand Italian possessions via irredentist claims based on the legacy of the Roman and Venetian empires. For this reason the fascists engaged in interventionist foreign policy . In 1935, Mussolini invaded Ethiopia and founded Italian East Africa , resulting in international isolation and leading to Italy's withdrawal from the League of Nations . Italy then allied with Nazi Germany and

11984-525: Was captured and summarily executed by partisans. Hostilities ended on 29 April 1945, when the German forces in Italy surrendered . Nearly half a million Italians died in the conflict, society was divided, and the economy all but destroyed—per capita income in 1944 was at its lowest point since 1900. The aftermath left Italy angry with the monarchy for its endorsement of the Fascist regime, contributing to

12096-724: Was conducive to academic and artistic advancement. The best-known maritime republics were Venice, Genoa , Pisa , and Amalfi . Each had dominion over overseas lands, islands, lands on the Adriatic, Aegean, and Black seas, and commercial colonies in the Near East and North Africa. Venice and Genoa were Europe's gateways to the East, and producers of fine glass, while Florence was a centre of silk, wool, banking, and jewellery. The wealth generated meant large public and private artistic projects could be commissioned. The republics participated in

12208-722: Was created. After the Lombard invasions, Italia was retained as the name for their kingdom, and its successor kingdom within the Holy Roman Empire . Lower Paleolithic artefacts, dating back 850,000 years, have been recovered from Monte Poggiolo . Excavations throughout Italy revealed a Neanderthal presence in the Middle Palaeolithic period 200,000 years ago, while modern humans appeared about 40,000 years ago at Riparo Mochi . The ancient peoples of pre-Roman Italy were Indo-European , specifically

12320-681: Was discovered in the Similaun glacier in 1991. The first colonisers were the Phoenicians , who established emporiums on the coasts of Sicily and Sardinia. Some became small urban centers and developed parallel to Greek colonies . During the 8th and 7th centuries, Greek colonies were established at Pithecusae , eventually extending along the south of the Italian Peninsula and the coast of Sicily, an area later known as Magna Graecia . Ionians , Doric colonists, Syracusans , and

12432-496: Was extended to all of Italy in 1861, and provided basic freedoms for the new state; but electoral laws excluded the non-propertied classes. The new kingdom was governed by a parliamentary constitutional monarchy dominated by liberals. As northern Italy quickly industrialised, southern and northern rural areas remained underdeveloped and overpopulated, forcing millions to migrate and fuelling a large and influential diaspora . The Italian Socialist Party increased in strength, challenging

12544-603: Was first part of the Axis until its surrender to the Allied powers (1940–1943), then a co-belligerent of the Allies during the Italian resistance and the liberation of Italy (1943–1945). Following the war, the monarchy was replaced by a republic and the country enjoyed a strong recovery . A developed country , Italy has the ninth-largest nominal GDP in the world, the second-largest manufacturing industry in Europe, and plays

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