Calcutta National Medical College And Hospital 3

Kolkata (, or , ; also known as Calcutta , the official name until 2001) is the capital of the Indian state of West Bengal, on the eastern bank of the Hooghly River west of the border with Bangladesh. It is the primary business, commercial, and financial hub of Eastern India and the main port of communication for North-East India. According to the 2011 Indian census, Kolkata is the seventh-most populous city in India, with a population of 45 lakh (4.5 million) residents within the city limits, and a population of over 1.41 crore (14.1 million) residents in the Kolkata Metropolitan Area. It is the third-most populous metropolitan area in India. In 2021, the Kolkata metropolitan area crossed 1.5 crore (15 million) registered voters. The Port of Kolkata is India's oldest operating port and its sole major riverine port. Kolkata is regarded as the cultural capital of India. Kolkata is the second largest Bengali-speaking city after Dhaka. It has the highest number of nobel laureates among all cities in India.—
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In the late 17th century, the three villages that predated Calcutta were ruled by the Nawab of Bengal under Mughal suzerainty. After the Nawab granted the East India Company a trading licence in 1690, the area was developed by the Company into an increasingly fortified trading post known as Fort William. Nawab Siraj ud-Daulah occupied Calcutta in 1756, and the East India Company retook it the following year. In 1793 the East India Company was strong enough to abolish native rule, and assumed full sovereignty of the region. Under company rule and later under the British Raj, Calcutta served as the capital of British-held territories in India until 1911. In that year, after assessing its geographical location, combined with growing nationalism in Bengal (Calcutta became the centre for the Indian independence movement), the British moved the capital to the relatively more centrally located New Delhi.

Following independence in 1947, Kolkata, which was once the premier centre of Indian commerce, culture, and politics, suffered many decades of political violence and economic stagnation before it rebounded. A demographically diverse global city, the culture of Kolkata features idiosyncrasies that include distinctively close-knit neighbourhoods (''paras'') and freestyle conversations (''adda''). Kolkata is home to eastern India's film industry, known as Tollywood, and cultural institutions, such as the Academy of Fine Arts, the Victoria Memorial, the Asiatic Society, the Indian Museum, and the National Library of India. Among scientific institutions, Kolkata hosts the Agri Horticultural Society of India, the Geological Survey of India, the Botanical Survey of India, the Calcutta Mathematical Society, the Indian Science Congress Association, the Zoological Survey of India, the Institution of Engineers, the Anthropological Survey of India and the Indian Public Health Association. Four Nobel laureates and two Nobel Memorial Prize winners are associated with the city.—
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— Though home to major cricketing venues and franchises, Kolkata stands out in India for being the country's centre of association football and also having strong culture in other sports less widespread elsewhere.

Etymology

The word ''Kolkata'' ( bn, কলকাতা ) derives from '' Kôlikata'' (
), the Bengali language name of one of three villages that predated the arrival of the British, the other two villages were Sutanuti and Govindapur.

There are several explanations for the etymology of this name:
*''Kolikata'' is thought to be a variation of ''Kalikkhetrô'' ( ), meaning "Field of he goddessKali". Similarly, it can be a variation of 'Kalikshetra' (Sanskrit: कालीक्षेत्र, lit. "area of Goddess Kali").
*Another theory is that the name derives from Kalighat.
*Alternatively, the name may have been derived from the Bengali term ''kilkila'' ( bn, কিলকিলা), or "flat area".
*The name may have its origin in the words ''khal'' ( bn, খাল ) meaning "canal", followed by ''kaṭa'' ( bn, কাটা ), which may mean "dug".
*According to another theory, the area specialised in the production of quicklime or ''koli chun'' ( bn, কলি চুন ) and coir or ''kata'' ( bn, কাতা ); hence, it was called ''Kolikata'').
Although the city's name has always been pronounced ''Kolkata'' or ''Kôlikata'' in Bengali, the anglicised form ''Calcutta'' was the official name until 2001, when it was changed to ''Kolkata'' in order to match Bengali pronunciation.

History

British colonial rule

The discovery and archaeological study of Chandraketugarh, north of Kolkata, provide evidence that the region in which the city stands has been inhabited for over two millennia. Kolkata's recorded history began in 1690 with the arrival of the English East India Company, which was consolidating its trade business in Bengal. Job Charnock, an administrator who worked for the company, was formerly credited as the founder of the city; In response to a public petition, the Calcutta High Court ruled in 2003 that the city does not have a founder. The area occupied by the present-day city encompassed three villages: Kalikata, Gobindapur and Sutanuti. Kalikata was a fishing village; Sutanuti was a riverside weavers' village. They were part of an estate belonging to the Mughal emperor; the ''jagirdari'' (a land grant bestowed by a king on his noblemen) taxation rights to the villages were held by the Sabarna Roy Choudhury family of landowners, or ''zamindars''. These rights were transferred to the East India Company in 1698.

In 1712, the British completed the construction of Fort William, located on the east bank of the Hooghly River to protect their trading factory. Facing frequent skirmishes with French forces, the British began to upgrade their fortifications in 1756. The Nawab of Bengal, Siraj ud-Daulah, condemned the militarisation and tax evasion by the company. His warning went unheeded, and the Nawab attacked; he captured Fort William which led to the killings of several East India company officials in the Black Hole of Calcutta. A force of Company soldiers (''sepoys'') and British troops led by Robert Clive recaptured the city the following year. Per the 1765 Treaty of Allahabad following the battle of Buxar, East India company was appointed imperial tax collector of the Mughal emperor in the province of Bengal, Bihar and Orissa, while Mughal-appointed Nawabs continued to rule the province. Declared a presidency city, Calcutta became the headquarters of the East India Company by 1773.

In 1793, ruling power of the Nawabs were abolished and East India company took complete control of the city and the province. In the early 19th century, the marshes surrounding the city were drained; the government area was laid out along the banks of the Hooghly River. Richard Wellesley, Governor-General of the Presidency of Fort William between 1797 and 1805, was largely responsible for the development of the city and its public architecture. Throughout the late 18th and 19th century, the city was a centre of the East India Company's opium trade. A census in 1837 records the population of the city proper as 229,700, of which the British residents made up only 3,138. The same source says another 177,000 resided in the suburbs and neighbouring villages, making the entire population of greater Calcutta 406,700.

In 1864, a typhoon struck the city and killed about 60,000 in Kolkata.

By the 1850s, Calcutta had two areas: White Town, which was primarily British and centred on Chowringhee and Dalhousie Square; and Black Town, mainly Indian and centred on North Calcutta. The city underwent rapid industrial growth starting in the early 1850s, especially in the textile and jute industries; this encouraged British companies to massively invest in infrastructure projects, which included telegraph connections and Howrah railway station. The coalescence of British and Indian culture resulted in the emergence of a new '' babu'' class of urbane Indians, whose members were often bureaucrats, professionals, newspaper readers, and Anglophiles; they usually belonged to upper-caste Hindu communities. In the 19th century, the Bengal Renaissance brought about an increased sociocultural sophistication among city denizens. In 1883, Calcutta was host to the first national conference of the Indian National Association, the first avowed nationalist organisation in India.

The partition of Bengal in 1905 along religious lines led to mass protests, making Calcutta a less hospitable place for the British. The capital was moved to New Delhi in 1911. Calcutta continued to be a centre for revolutionary organisations associated with the Indian independence movement. The city and its port were bombed several times by the Japanese between 1942 and 1944, during World War II. Coinciding with the war, millions starved to death during the Bengal famine of 1943 due to a combination of military, administrative, and natural factors. Demands for the creation of a Muslim state led in 1946 to an episode of communal violence that killed over 4,000. The partition of India led to further clashes and a demographic shift—many Muslims left for East Pakistan (present day Bangladesh), while hundreds of thousands of Hindus fled into the city.

Contemporary

During the 1960s and 1970s, severe power shortages, strikes and a violent Marxist–Maoist movement by groups known as the Naxalites damaged much of the city's infrastructure, resulting in economic stagnation.—
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— The Bangladesh Liberation War of 1971 led to a massive influx of thousands of refugees, many of them penniless, that strained Kolkata's infrastructure. During the mid-1980s, Mumbai (then called Bombay) overtook Kolkata as India's most populous city. In 1985, Prime Minister Rajiv Gandhi dubbed Kolkata a "dying city" in light of its socio-political woes. In the period 1977–2011, West Bengal was governed from Kolkata by the Left Front, which was dominated by the Communist Party of India (CPM). It was the world's longest-serving democratically elected communist government, during which Kolkata was a key base for Indian communism. In the 2011 West Bengal Legislative Assembly election, Left Front was defeated by the Trinamool Congress. The city's economic recovery gathered momentum after the 1990s, when India began to institute pro-market reforms. Since 2000, the information technology (IT) services sector has revitalised Kolkata's stagnant economy. The city is also experiencing marked growth in its manufacturing base.

Geography

Spread roughly north–south along the east bank of the Hooghly River, Kolkata sits within the lower Ganges Delta of eastern India approximately 75 km (47 mi) west of the international border with Bangladesh; the city's elevation is . Much of the city was originally a wetland that was reclaimed over the decades to accommodate a burgeoning population. The remaining undeveloped areas, known as the East Kolkata Wetlands, were designated a "wetland of international importance" by the Ramsar Convention (1975). As with most of the Indo-Gangetic Plain, the soil and water are predominantly alluvial in origin. Kolkata is located over the "Bengal basin", a pericratonic tertiary basin. Bengal basin comprises three structural units: shelf or platform in the west; central hinge or shelf/slope break; and deep basinal part in the east and southeast. Kolkata is located atop the western part of the hinge zone which is about wide at a depth of about below the surface. The shelf and hinge zones have many faults, among them some are active. Total thickness of sediment below Kolkata is nearly above the crystalline basement; of these the top is Quaternary, followed by of Tertiary sediments, trap wash of Cretaceous trap and Permian-Carboniferous Gondwana rocks. The quaternary sediments consist of clay, silt and several grades of sand and gravel. These sediments are sandwiched between two clay beds: the lower one at a depth of ; the upper one in thickness. According to the Bureau of Indian Standards, on a scale ranging from in order of increasing susceptibility to earthquakes, the city lies inside seismic zone III.

Urban structure

The Kolkata metropolitan area is spread over and comprises 4 municipal corporations (including Kolkata Municipal Corporation), 37  local municipalities and 24 panchayat samitis, as of 2011. The urban agglomeration encompassed 72 cities and 527 towns and villages, as of 2006. Suburban areas in the Kolkata metropolitan area incorporate parts of the following districts: North 24 Parganas, South 24 Parganas, Howrah, Hooghly and Nadia. Kolkata, which is under the jurisdiction of the Kolkata Municipal Corporation (KMC), has an area of . The east–west dimension of the city is comparatively narrow, stretching from the Hooghly River in the west to roughly the Eastern Metropolitan Bypass in the east—a span of . The north–south distance is greater, and its axis is used to section the city into North, Central, South and East Kolkata.
North Kolkata is the oldest part of the city. Characterised by 19th-century architecture and narrow alleyways, it includes areas such as Jorasanko, Rajabazar, Maniktala, Ultadanga, Shyambazar, Shobhabazar, Bagbazar, Cossipore, Sinthee etc. The north suburban areas like Dum Dum, Baranagar, Belgharia, Sodepur, Khardaha, New Barrackpore, Madhyamgram, Barrackpore, Barasat etc. are also within the city of Kolkata (as a metropolitan structure). Central Kolkata hosts the central business district. It contains B. B. D. Bagh, formerly known as Dalhousie Square, and the Esplanade on its east; Rajiv Gandhi Sarani is on its west. The West Bengal Secretariat, General Post Office, Reserve Bank of India, Calcutta High Court, Lalbazar Police Headquarters and several other government and private offices are located there. Another business hub is the area south of Park Street, which comprises thoroughfares such as Jawahar Lal Nehru Road, Abanindra Nath Tagore Sarani, Dr. Martin Luther King Sarani, Dr. Upendra Nath Brahmachari Sarani, Shakespeare Sarani and Acharay Jagadish Chandra Basu Road. South Kolkata developed after India gained independence in 1947; it includes upscale neighbourhoods such as Bhawanipore, Alipore, Ballygunge, Kasba, Dhakuria, Santoshpur, Garia, Golf Green, Tollygunge, New Alipore, Behala, Barisha etc. The south suburban areas like Maheshtala, Budge Budge, Rajpur Sonarpur, Baruipur etc. are also within the city of Kolkata (as a metropolitan structure). The Maidan is a large open field in the heart of the city that has been called the "lungs of Kolkata" and accommodates sporting events and public meetings. The Victoria Memorial and Kolkata Race Course are located at the southern end of the Maidan. Among the other parks are Central Park in Bidhannagar and Millennium Park on Rajiv Gandhi Sarani, along the Hooghly River.

Two planned townships in the greater Kolkata region are Bidhannagar, also known as Salt Lake City and located north-east of the city; and Rajarhat, also called New Town and located east of Bidhannagar. In the 2000s, Sector 5 in Bidhannagar developed into a business hub for information technology and telecommunication companies. Both Bidhannagar and New Town are situated outside the Kolkata Municipal Corporation limits, in their own municipalities.

Climate

Kolkata is subject to a tropical wet-and-dry climate that is designated ''Aw'' under the Köppen climate classification. According to a United Nations Development Programme report, its wind and cyclone zone is "very high damage risk".

Temperature

The annual mean temperature is ; monthly mean temperatures are . Summers (March–June) are hot and humid, with temperatures in the low 30s Celsius; during dry spells, maximum temperatures sometime exceed 40 °C (104 °F) in May and June. Winter lasts for roughly months, with seasonal lows dipping to in December and January. May is the hottest month, with daily temperatures ranging from ; January, the coldest month, has temperatures varying from . The highest recorded temperature is , and the lowest is . The winter is mild and very comfortable weather pertains over the city throughout this season.
Often, in April–June, the city is struck by heavy rains or dusty squalls that are followed by thunderstorms or hailstorms, bringing cooling relief from the prevailing humidity. These thunderstorms are convective in nature, and are known locally as ''kal bôishakhi'' (), or "Nor'westers" in English.

Rainfall

Rains brought by the Bay of Bengal branch of the south-west summer monsoon lash Kolkata between June and September, supplying it with most of its annual rainfall of about . The highest monthly rainfall total occurs in July and August. In these months often incessant rain for days brings life to a stall for the city dwellers. The city receives 2,107 hours of sunshine per year, with maximum sunlight exposure occurring in April. Kolkata has been hit by several cyclones; these include systems occurring in 1737 and 1864 that killed thousands. More recently, Cyclone Aila in 2009 and Cyclone Amphan in 2020 caused widespread damage to Kolkata by bringing catastrophic winds and torrential rainfall.

Environmental issues

Pollution is a major concern in Kolkata. , sulphur dioxide and nitrogen dioxide annual concentration were within the national ambient air quality standards of India, but respirable suspended particulate matter levels were high, and on an increasing trend for five consecutive years, causing smog and haze. Severe air pollution in the city has caused a rise in pollution-related respiratory ailments, such as lung cancer.

Economy

Kolkata is the commercial and financial hub of East and North-East India and home to the Calcutta Stock Exchange. It is a major commercial and military port, and is one of five cities in eastern India (alongside Bhubaneswar, Guwahati, Imphal, and Kushinagar) to have an international airport. Once India's leading city, Kolkata experienced a steady economic decline in the decades following India's independence due to steep population increases and a rise in militant trade-unionism, which included frequent strikes that were backed by left-wing parties. From the 1960s to the late 1990s, several factories were closed and businesses relocated. The lack of capital and resources added to the depressed state of the city's economy and gave rise to an unwelcome sobriquet: the "dying city". The city's fortunes improved after the Indian economy was liberalised in the 1990s and changes in economic policy were enacted by the West Bengal state government. Recent estimates of the economy of Kolkata's metropolitan area have ranged from $150 to $250 billion ( PPP GDP), and have ranked it third-most productive metro area of India.—
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Flexible production has been the norm in Kolkata, which has an informal sector that employs more than 40% of the labour force. One unorganised group, roadside hawkers, generated business worth 87.72 billion ( 2 billion) in 2005. , around 0.81% of the city's workforce was employed in the primary sector (agriculture, forestry, mining, etc.); 15.49% worked in the secondary sector (industrial and manufacturing); and 83.69% worked in the tertiary sector (service industries). , the majority of households in slums were engaged in occupations belonging to the informal sector; 36.5% were involved in servicing the urban middle class (as maids, drivers, etc.) and 22.2% were casual labourers. About 34% of the available labour force in Kolkata slums were unemployed. According to one estimate, almost a quarter of the population live on less than 27 rupees (equivalent to 45 US cents) per day.

Major manufacturing companies in the city are Alstom, Larsen & Toubro, Fosroc, Videocon. As in many other Indian cities, information technology became a high-growth sector in Kolkata starting in the late 1990s; the city's IT sector grew at 70% per annum—a rate that was twice the national average. The 2000s saw a surge of investments in the real estate, infrastructure, retail, and hospitality sectors; several large shopping malls and hotels were launched. Companies such as ITC Limited, CESC Limited, Exide Industries, Emami, Eveready Industries India, Lux Industries, Rupa Company, Berger Paints, Birla Corporation, Britannia Industries and Purushottam Publishers are headquartered in the city. Philips India, PricewaterhouseCoopers India, Tata Global Beverages, and Tata Steel have their registered office and zonal headquarters in Kolkata. Kolkata hosts the headquarters of three major public-sector banks: Allahabad Bank, UCO Bank, and the United Bank of India; and a private bank Bandhan Bank. Reserve Bank of India has its eastern zonal office in Kolkata, and India Government Mint, Kolkata is one of the four mints in India. Some of the oldest public sector companies are headquartered in the city such as the Coal India Limited, National Insurance Company, Garden Reach Shipbuilders & Engineers, Tea Board of India, Geological Survey of India, Zoological Survey of India, Botanical Survey of India, Jute Corporation of India, National Test House, Hindustan Copper and the Ordnance Factories Board of the Indian Ministry of Defence.

Demographics

Population

The demonym for residents of Kolkata are ''Calcuttan'' and ''Kolkatan''. According to provisional results of the 2011 national census, Kolkata district, which occupies an area of , had a population of
4,486,679; its population density was . This represents a decline of 1.88% during the decade 2001–11. The sex ratio is 899 females per 1000 males—lower than the national average. The ratio is depressed by the influx of working males from surrounding rural areas, from the rest of West Bengal; these men commonly leave their families behind. Kolkata's literacy rate of 87.14% exceeds the national average of 74%. The final population totals of census 2011 stated the population of city as 4,496,694. The urban agglomeration had a population of 14,112,536 in 2011.

, about one-third of the population, or 15 lakh (1.5 million) people, lived in 3,500 unregistered squatter-occupied and 2,011 registered slums. The authorised slums (with access to basic services like water, latrines, trash removal by the Kolkata Municipal Corporation) can be broadly divided into two groups—''bustees'', in which slum dwellers have some long term tenancy agreement with the landowners; and ''udbastu colonies'', settlements which had been leased to refugees from present-day Bangladesh by the government. The unauthorised slums (devoid of basic services provided by the municipality) are occupied by squatters who started living on encroached lands—mainly along canals, railway lines and roads. According to the 2005 National Family Health Survey, around 14% of the households in Kolkata were poor, while 33% lived in slums, indicating a substantial proportion of households in slum areas were better off economically than the bottom quarter of urban households in terms of wealth status. Mother Teresa was awarded the Nobel Peace Prize for founding and working with the Missionaries of Charity in Kolkata—an organisation "whose primary task was to love and care for those persons nobody was prepared to look after".

Languages

Bengali, the official state language, is the dominant language in Kolkata. English is also used, particularly by the white-collar workforce. Hindi and Urdu