Indian geography

Geological and Physiographic divisions of India

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Three Geological divisions:

  1. The peninsular block
  2. The Himalayas and other Peninsular Mountains
  3. Indo-Ganga-Brahmaputra Plain

 

  • Peninsualar block is made of gneisses (metamorphic) and granites (igneous).

Six physiographic divisions:

  1. The Northern and North-eastern Mountains
  2. The Northern Plain
  3. The Peninsular Plateau
  4. The Indian Desert
  5. The Coastal Plains
  6. The Islands

Northern and North-Eastern Mountains

Approximate length of the Great Himalayan range: 2500 KM. Width: 160-400 KM

Impact of Himalayas on the climate of India?

It can be divided into five sub-divisions:

  1. Kashmir (or Northwestern) Himalayas
  2. Himachal and Uttaranchal Himalayas
  3. Darjeeling and Sikkim Himalayas
  4. Arunachal Himalayas
  5. Eastern Hills and Mountains

Kashmir Himalayas

  • Ranges: Karakoram, Ladhakh, Zaskar, Pir Pinjal
  • Glaciers: Baltoro, Siachen
  • Passes: Zoji La (Great Himalayas), Banihal (Pir Pinjal), Photu La (Zaskar) and Khardung La (Ladakh)
  • Lakes: (freshwater) Dal and Wular; (saltwater) Pangong Tso and Tso Moriri
  • Pilgrimage: Vaishno Devi, Amarnath Cave, Charar-e-Sharif
  • They are also famous for Karewa formations which are useful for the cultivation of Zafran (a local variety of Saffron). Karewas are the thick deposits of glacial clay and other materials embedded with moraines.
  • Kashmir is located on the banks of Jhelum river.
  • Meanders is a typical feature associated with the rivers in this region.
  • In South, there are longitudinal valleys called duns; Jammu dun and Pathankot dun

 

Himachal and Uttarakhand Himalayas

  • Lies between rivers Ravi and Kali
  • Drained by two major river systems: Indus and Ganga
  • Northernmost part is an extension of the Ladakh desert, lies in Spiti.
  • Ranges: Great Himalayan Range, Lesser Himalayas (Dhaoladhar in HP and Nagtibha in Uttarakhand), Shivalik range
  • Pilgrimage: Gangotri, Yamunotri, Kedarnath, Badrinath, Hemkund Sahib and the five famous prayags (Refer to Panch Prayag)
  • Famous for hill stations: Dharamshala, Mussoorie, Shimla, Kaosani; Cantt.: Kasauli, Almora, Lansdowne, Ranikhet
  • The important distinguishing features of this area are the ‘Shivalik’ and ‘Dun formations’.
  • Important duns: Chandigarh-Kalka, Nalagarh, Dehra, Harike, Kota
  • Dehradun is the largest of all duns: Length – 35-45 KM, Width: 22-25 KM
  • Inhabited with the Bhotia They migrate to higher reaches (Bugyals) in summer and return to the valleys during winters.

 

Darjeeling and Sikkim Himalayas

  • Between Nepal Himalayas and Bhutan Himalayas.
  • Fast flowing rivers such as Tista
  • Peaks: Kanchenjunga
  • Tribe: Lepcha
  • Has a mixed population of Nepalis, Bengalis and tribals from Central India.
  • Importance: Due to the moderate slope, it is best suited for tea plantations. <India produces about 26 pc of tea in the world; second after China. Also, accounts for 12 pc of tea exports; fourth in the world.>
  • Duar formations are peculiar to this region.

 

Arunachal Himalayas

  • From Bhutan Himalayas to Diphu pass in the east.
  • Direction: Southwest to Northeast
  • Peaks: Kangtu and Namya Barwa
  • Rivers: Brahmaputra, Kameng, Subansiri, Dihang, Dibang and Lohit.
  • These rivers are perennial and have the highest hydro-electric power potential in the country.
  • Tribes: Monpa, Daffla, Abor, Mishmi, Nishi and Nagas
  • These communities practice shifting cultivation known as Jhumming.

 

Eastern Hills and Mountains

  • Direction: North to South
  • Ranges: Patkai Bum, Naga hills, Manipur hills, Mizo or Lushai hills
  • These are low hills
  • Tribes practice Jhum cultivation
  • Rivers: Barak. Most of the Nagaland rivers form a tributary of Brahmaputra. Rivers in eastern Manipur are the tributaries of Chindwin, which in turn is a tributary of the Irrawady of Myanmar.
  • Lake: Loktak
  • Loktak Lake: is an important lake in Manipur which is surrounded by mountains on all sides. It is the largest freshwater lake in northeastern India. Also called the only Floating Lake in the world due to floating masses of organic matter on it. It serves as a source for hydropower generation, irrigation and drinking water supply.
  • Keibul Kamjao National Park located in the Bishnupur district of Manipur is the only floating park in the world and is an integral part of the Loktak Lake. Home to the endangered Manipur Eld’s Deer or Brow-antlered Deer or Sangai or Dancing Deer.
  • Mizoram is also known as the ‘Molassis basin’ which is made up of soft unconsolidated deposits.

The Northern Plains

  • Formed by the alluvial deposits of rivers – Indus, Ganga and Brahmaputra.
  • Length: 3200 KM; Width: 150-300 KM

Three main zones:

  1. Bhabar
  2. Tarai
  3. Alluvial Plains (Khadar and Bangar)

Bhabar

  • Narrow belt. 8-10 KM wide.
  • Paralllel to Shivalik at the break-up of the slope. Hence, streams and rivers deposit heavy rocks (and at times disappear) in this zone.

Tarai

  • South of Bhabar. 10-20 KM wide.
  • Rivers re-emerge and create marshy and swampy conditions known as Tarai.

Alluvial Belt

  • South of Tarai.
  • Features of mature stage of fluvial erosional and depositional landforms such as sand bars, meanders, ox-bow lakes and braided channels. Riverine islands in Brahmaputra.
  • Brahmaputra takes a turn an almost 90 degree turn at Dhubri (Assam) before entering Bangladesh.

 

Peninsular Plateau

  • Bounded by the Delhi ridge, Rajmahal Hills, Gir range and Cardamom hills.
  • Made up of a series of patland plateaus: Hazaribagh, Palamu, Ranchi, Malwa, Coimbatore, Karnataka etc.
  • One of the oldest and most stable landmass of India.
  • Physiographic Features: Tors, block mountains, rift valleys, spurs, bare rocky structures, hummocky hills and quartzite dykes offering natural sites for water storage.
  • Black soil in western and northwestern parts.
  • Bhima fault in this region has frequent seismic activity (Lathur earthquake)
  • NW part also has ravines and gorges: Chambal, Bhind and Morena.

Three broad regions:

  1. Deccan Plateau
  2. Central Highlands
  3. Northwestern Plateau

Deccan Plateau

  • Bordered by Eastern Ghats, Satpura, Maikal range and Mahadeo hills
  • Important ranges: WG: Sahyadri, Nilgiri, Anaimalai and Caradamom hills; EG: Javadi hills, Palconda range, Nallamala Hills, Mahendragiri hills
  • EG and WG meet at Nilgiri hills.
  • Highest peak: Anaimudi (2695 m) on Anaimalai hills; Dodabetta (2637 m) on Nilgiri hills.
  • Rivers: Mahanadi, Godavari, Krishna, Kaveri etc.

Central Highlands

  • Bounded by the Aravali and Satpura range.
  • Relic mountains, highly denuded and form discontinuous ranges.
  • Near Jaisalmer it is covered by the longitudinal sand ridges and crescent-shaped sand dunes called barchans.
  • Elevation: 700-1000 m
  • Banas, a tributary of Chambal, originates in the Aravalli. Other tributaries of Yamuna originate from the Vindhyan and Kaimur ranges.
  • Minerals in Chotanagpur plateau.

 

Northeastern Plateau

  • Extension of the main Peninsular plateau.
  • Meghalaya and Karbi Anglong plateau.
  • Megahalaya plateau: Garo hills, Khasi hills and Jaintia hills (named after the tribals inhabiting the region)
  • Rich in minerals like coal, iron, sillimanite, limestone and uranium.
  • Receives maximum rainfall from SW monsoon. Hence, Meghalaya plateau has a highly eroded surface. Cherrapuni and Myswarnam.

 

Indian Desert

  • Aka Marusthali
  • Northwest of the Aravali hills
  • Dotted with longitudinal dunes and barchans.
  • Low rainfall: >150 mm per year Low vegetation cover
  • Evidence that this area was under the sea during the Mesozoic era.
  • Features: mushroom rocks, shifting dunes and oasis.
  • Rivers are ephemeral: Luni. Brackish lakes. Inland drainage.

 

Coastal Plains

Two divisions:

  1. Western coastal plains
  2. Eastern Coastal Plains

Western Coastal Plains

  • Submerged coastal plain. Hence, a narrow belt. Narrow in middle and broader towards north and south.
  • Ports: Provides natural conditions for the development of ports and harbours due to submergence. Kandla, Mazagaon (Mumbai), JLN port Navha Sheva, Maramagao, Mangalore, Cochin etc.
  • Mumbai has the world’s largest natural harbour.
  • May be divided into: Kachchh and Kathiawar coast in Gujarat, Konkan coast, Goan coast and Malabar coast.
  • Rivers don’t form delta.
  • Kayals (Backwaters): Found in the Malabar coast. Used for fishing and inland navigation. Every year Nehru Trophy Vallamkali (boat race) is held in Punnamada Kayal in Kerala.

 

Eastern Coastal Plains

  • Broader
  • Emergent coast. Hence, less number of ports and harbours. Chennai, Vizag, Paradwip, Haldia.
  • Delta formation

The Islands

Two major Divisions:

  1. Andaman and Nicobar
  2. Lakshwadeep & Minicoy

 

Andaman and Nicobar

  • Two major island groups: Ritchie’s archipelago and the Labrynth island.
  • The group is divided into: Andaman in the North and Nicobar in the South.
  • Andaman and Nicobar separated by the Ten Degree channel.
  • Barren Island
  • Peaks: Saddle Peak (N.Andaman – 738 m), Mt. Diavolo (Middle Andaman – 515 m), Mt. Koyob (S Andaman – 460 m) and Mt. Thuiller (Great Nicobar – 642 m)
  • Coral deposits found
  • Convectional rainfalls and equatorial type of vegetation.

Lakshadweep and Minicoy

  • Entire group built of coral deposits.
  • Total of 36 islands of which 11 are inhabited.
  • Smallest UT
  • Minicoy is the largest island
  • Separated by the 9 Degree Channel, north of which is the Amini Island and to the south Canannore island.
  • These islands have storm beaches consisting of unconsolidated pebbles, shingles, cobbles and boulders.

CHARACTERISTICS AND PROBLEMS OF INDIAN AGRICULTURE

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CHARACTERISTICS AND https://exam.pscnotes.com/problems-of-indian-Agriculture-notes-for-state-psc-exams”>Agriculture“>Problems of Indian Agriculture

  1. Subsistent in Character
  2. Heavy Pressure of Population
  3. Predominance of Food Grains
  4. Mixed Cropping
  5. High Percentage of the Reporting Area under Cultivation
  6. Small Size of Holdings and Fragmentation of Fields
  7. Limited Intensive Agriculture
  8. Primitive Technology
  9. Indian Agriculture is Labour Intensive
  10. Rain-fed Agriculture
  11. Less Area under Leguminous and Fodder Crops
  12. Tradition Bound
  13. Low Productivity
  14. Government Policy
  15. Lack of Definite Agricultural Land Use Policy
  16. Lack of Marketing and Storage Facilities
  17. Low Status of Agriculture in the Society
  18. Land Tenancy
  19. POVERTY and Indebtedness of the Farmers
  20. Inadequacy of Extension Service
  21. Inadequate Agricultural Research and Education, Training, and Extension
  22. Soil Erosion and Soil Degradation
  23. Other Characteristics and Problems

 

AQUA CULTURE

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AQUA CULTURE

  • the cultivation of aquatic organisms.
  • aquaculture, also known as aquafarming, implies the cultivation of aquatic populations under controlled conditions.
  • Mariculture refers to aquaculture practiced in marine environments.
  • Particular kinds of aquaculture include Agriculture-notes-for-state-psc-exams”>Agriculture (the production of kelp, seaweed, and other algae), fish farming, shrimp farming, shellfish farming, and growing of cultured pearls.

Growth and Development of Aquaculture

  • has been used in China since circa 2500 BC.
  • practice of aquaculture gained prevalence in Europe during theMiddle Ages since fish were scarce and thus expensive.
  • Americans were rarely involved in aquaculture until the late 20th century but California residents harvested wild kelp and made legal efforts to manage the supply starting circa 1900, later even producing it as a wartime resource.
  • the rise of aquaculture is a contemporary phenomenon.

 

Types of Aquaculture 1. Algaculture

  • A form of aquaculture involving the farming of species of algae.
  • Majority of algae are intentionally cultivated fall into the category of microalgae, also referred to as phytoplankton, microphytes, or planktonic algae.
  • Macro algae, commonly known as seaweed, also have many commercial and industrial uses, but due to their size and the specific requirements of the Environment in which they need to grow, they do not lend themselves as readily to cultivation on a large scale as microalgae and are most often harvested wild from the ocean.

 

  1. Fish Farming
  • The principal form of aquaculture, while other methods may fall under mariculture.
  • Involves raising fish commercially in tanks or enclosures, usually for food.
  • Fish species raised by fish farms include salmon, catfish, tilapia, cod, carp, trout, and others.
  • Increasing demands on wild by commercial fishing operations have caused widespread overfishing.
  • Offers an alternative solution to the increasing market demand for fish and fish protein.

 

  1. Freshwater Prawn Farming
  • An aquaculture business designed to raise and produce freshwater prawn or shrimp for human consumption.
  • Shares many characteristics with, and many of the same problems as, marine shrimp farming.
  • Unique problems are introduced by the development life cycle of the main species (the giant river prawn, Macrobrachium rosenbergiz).
  1. Integrated Multi-Trophic Aquaculture
  • A practice in which the by- products (wastes) from one species are recycled to become inputs ( fertilisers, food) for another.
  • Fed aquaculture (e.g. fish, shrimp) is combined with inorganic extractive (e.g. seaweed) and organic extractive (e.g. shellfish) aquaculture to create balanced systems for environmental sustainability (biomitigation), economic stability (product diversification and risk reduction), and social acceptability (better management practices).
  1. Mariculture
  • a specialised branch of aquaculture involving the cultivation of Marine Organisms for food and other products in the open ocean, an enclosed section of the ocean, or in tanks, ponds or raceways which are filled with seawater.
  • the farming of marine fish, prawns, or oysters in saltwater ponds.
  • Non-food products produced by mariculture include Fish Meal, nutrient agar, jewelleries ( e.g. cultured pearls), and cosmetics.

 

  1. Shrimp Farming
  • an aquaculture for the cultivation of marine shrimp for human consumption.
  • Commercial shrimp farming began in the 1970s, and production grew steeply, particularly to match the market demands of the US, Japan, and Western Europe.
  • About 75°/o of farmed shrimp is produced in Asia, in particular in China and Thailand.
  • The other 25% is produced mainly in Latin America, where Brazil is the largest producer.
  • The largest exporting nation is Thailand.
  • Shrimp farming on modern lines is being done in Andhra Pradesh (Nellore District), a state of India (see Blue Revolution)

Strategies for the Fisheries Development

  • Under the Jawahar Rozgar Yojna, village panchayats have been authorised to carry out fisheries development programmes in respective villages.
  • Under the programme of Development of Model Fishermen Villages, basic civic amenities such as housing, drinking water and construction of community halls for fishermen villages are provided.
  • Brackish Fish Farmers Development Agencies (BFDA) functioning in the coastal areas of the country is providing a package of technical, financial and extension support to shrimp farmers.
  • Insurance facilities have been extended to fishermen for the insurance and security of their life.
  • The government is collecting data on the micro-climates of various water bodies to promote fisheries in the country.

Problems and Prospects

  1. Most of the fishermen are poor. They are not able to purchase good equipment to improve the harvest of fish.
  2. The water bodies (rivers, lakes, ponds, and coastal areas of the seas) are increasingly polluted.
  3. The area of paddy fields in which fisheries used to be kept is also decreasing under the impact of fast growth of Population, industrialisation, and Urbanisation.
  4. Adequate information about the environment of water-bodies (ponds, lakes, rivers, and sea is not available).
  5. Unpredictable nature of monsoon as a result of which the inland fisheries suffer adversely.
  6. Problem of Marketing, storage, and transportation.
  7. Inadequacy of research and extension service facilities.
  8. There is need of Pink Revolution (Prawns) in the coastal regions of the country.

 

BLUE REVOLUTION IN INDIA

  • the adoption of a package programme to increase the production of fish and marine products.
  • started in 1970 during the Fifth Five-Year Plan when the Central Government sponsored the Fish Farmers Development Agency (FFDA).
  • Subsequently, the Brakish Water Fish Farms Development Agency were set up to develop aquaculture.
  • brought improvement in aquaculture by adopting new techniques of fish breeding, fish rearing, fish marketing, and fish export.
  • tremendous increase in the production of shrimp. Andhra Pradesh and Tamil Nadu have developed shrimp in a big way.
  • The Nellore District of Andhra Pradesh is known as the ‘Shrimp Capital of India’.
  • There are more than 1800 species of fish found in the sea and inland waters of India, of which a very few are commercially important.
  • important sea fish include catfish, herring, mackerels, perches, mullets, Indian salmon, shell fish, eels, anchovies, and dorab.
  • the main fresh water fish include catfish, loaches, perches, eels, herrings, feather backs, mullets, carps, prawns, murrels, and anchovies.
  • Marine fisheries contribute about 50 per cent of the total fish production of the country.
  • Kerala is the leading producer followed by Maharashtra, Karnataka, Gujarat, and Goa.
  • The fishing season extends from September to March.
  • The higher fish production in the Arabian Sea is due to the broader continental shelf.
  • The important fish varieties include sardines, mackerel and prawn.
  • The East Coast contributes about 28 per cent of the total production of marine fish in the country.
  • The fishing activity along the East coast is mainly carried on from Rameswaram in the south to Ganjam in the north, with fishing season from September to April along the Coromandal Coast.
  • The National Fisheries Development Board has been set up to realize the untapped potential of fishery sector with the application of modern tools of research and development including Biotechnology.

 

Sustainable and Inclusive Growth

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The term Sustainable growth became prominent after the World Conservation Strategy Presented in 1980 by the International Union for the Conservation of Nature and Natural Resources. Brundland Report(1987) define sustainable development as the a process which seek to meet the needs and aspirations of the present generation without compromising the ability of the future generation to meet their own demands.

Natural resources are limited and thus sustainable development promotes their judicious use and put emphasis on conservation and protection of environment.Global warming and Climate change has brought the issue of Sustainable development in prominence.

Inclusive Growth is economic growth that creates opportunity for all segments of the population and distributes the dividends of increased prosperity, both in monetary and non-monetary terms, fairly across society.Indian Plans after the independence were based on the downward infiltration theory, which failed to bring equitable growth to all the sections of the Indian society.

Approach paper of 11th five year plan talked about “Inclusive and more faster growth” through bridging divides by including those in growth process who were excluded. Divide between above and Below Poverty Line, between those with productive jobs and those who are unemployed or grossly unemployed is at alarming stage.

Liberalization and Privatization after 1990’s have brought the nation out of the hindu growth rate syndrome but the share of growth has not been equitably distributed amongst different sections of Indian Society.

Various dimensions of Inclusive growth are:-

  1. economic
  2. social
  3. financial
  4. environmental

Important issues that are needed to be addressed to achieve the inclusive growth are:-

  1. Poverty
  2. Unemployment
  3. Rural Infrastructure
  4. Financial Inclusion
  5. Balanced regional development
  6. Gender equality
  7. Human Resource Development (Health, Education, Skill Development)
  8. Basic Human Resources like sanitation, drinking water, housing etc.

Government has launched several programs and policies for Inclusive growth such as:-

  1. MNREGA
  2. Jan Dhan Yojna
  3. Atal Pension Yojna
  4. Skill India Mission
  5. Deen Dayal Upadhyaya Gram Jyoti Yojana
  6. Pradhan Mantri Suraksha Bima Yojana
  7. Pradhan Mantri Jeevan Jyoti Bima Yojana
  8. Sukanya Samridhi Yojana
  9. Pradhan Mantri  Garib Kalyan Yojana
  10. Jan Aushadhi Yojana (JAY)
  11. Nai Manzil Scheme for minority students
  12. The Pradhan Mantri Awas Yojana (PMAY) or Housing for all by 2022

inclusive groth

 

 

Natural Resources of India

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What are https://exam.pscnotes.com/natural-Resources“>Natural Resources ?

Natural resources are useful raw materials that we get from the Earth. They occur naturally, which means that humans cannot make natural resources. Instead, we use and modify natural resources in ways that are beneficial to us. The materials used in human-made objects are natural resources. Some examples of natural resources and the ways we can use them are:

 

Natural resources                                                                Products and Services

Air                                                                                         Wind Energy

Animals                                                                                Foods ( Milk, Steak, Bacon etc.),

Clothing ( wool, silk etc.

Coal                                                                                       Electricity

Minerals                                                                                Coins, wire, Steel, Aluminium etc.

Natural gas                                                                             Electricity and Heating

Oil                                                                                           Electricity, Fuel for vehicles

Plants                                                                                      Wood, Paper, Cotton etc.

Sunlight                                                                                   Solar power, Photosynthesis

Water                                                                                       Hydroelectricity, Drinking, Cleaning

 

INDIA : NATURAL RESOURCES

  1. Land Resources: In terms of area India ranks seventh in the world with a total area of 32, 87.263 sq. km. (32.87 crore hectare). It accounts for 2.42% of total area of the world. In absolute terms India is really a big country. However, land man ratio is not favourable because of the huge Population size.

Land utilisation figures are available for about 92.9% of total geographical area, that is, for 3,287.3 lakh hectare. Forest constitutes 24.01 % of the total geographical area of country. Out of a total land area of 304.2 million hectares about 170.0 million hectares is under cultivation. Food grains have preponderance in gross cropped areas as compared to non food grains. According to Agricultural Census, the area operated by large holdings (10 hectares and above) has declined and area operated under marginal holdings (less than one hectare) has increased. This indicates that land is being fragmented.

  1. Forest Resources: India’s forest cover is 78.92 million hectare which is 24.01 % of the geographical area of the country. The per capita forest in India (0.5 hectare) is much less than that in the world (1.9 hectares). According to the National Policy on Forests (1988), one-third (33%) of the country’s area should be covered by forests in order to maintain ecological balance.
  2. 3. Mineral Resources :

Iron-Ore: India possesses high quality iron-ore in abundance. The total reserves of iron-ore in the country are about 14.630 million tonnes of haematite and 10,619 million tonnes of magnetite. Haematite iron is mainly found in Chbattisgarh, Jharkhand, Odisha, Goa and Karnataka. The major deposit of magnetite iron is available at western coast of Karnataka. Some deposits of iron ore arc also found in Kerala, Tamil Nadu and Andhra Pradesh.

Coal reserves : India has the fifth largest coal reserves in the world. As on 31 March 2015, India had 306.6 billion metric tons (338.0 billion short tons) of the resource. The known reserves of coal rose 1.67% over the previous year, with the discovery of an estimated 5.04 billion metric tons (5.56 billion short tons). The estimated total reserves of lignite coal as on 31 March 2015 was 43.25 billion metric tons (47.67 billion short tons). The energy derived from coal in India is about twice that of the energy derived from oil, whereas worldwide, energy derived from coal is about 30% less than energy derived from oil. Coal deposits are primarily found in eastern and south-central India. Jharkhand, Odisha, Chhattisgarh, West Bengal, Madhya Pradesh, Telangana and Maharashtra accounted for 99.08% of the total known coal reserves in India. As on 31 March 2015, Jharkhand and Odisha had the largest coal deposits of 26.44% and 24.72% respectively .

The top producing states are:

Other notable coal-mining areas are as follows :

 

Bauxite:

Bauxite is a main source of Metal like aluminium. It is not a specific mineral but a rock consisting mainly of hydrated aluminium oxides. It is clay-like substance which is pinkish whitish or reddish in colour depending on the amount of iron content.

The total reserves of bauxite in India are estimated at 27.40 crores tonnes. The major bauxite producing states in India are Orissa, Jharkhand, Gujrat, Maharashtra, Madhya Pradesh, Karnataka, Tamil Nadu, Uttar Pradesh and Goa in a descending order of importance.

Large amount of bauxite comes from:

Orissa : Sambalpur, Koraput, Kalahandi and Ganjam,

Jharkhand : Lohardaga near Ranchi and Palamau districts,

Maharashtra: Ratnagiri and Kolaba, Thane, Satara of Kolhapur district,

Madhya Pradesh:  Chhattisgarh – Balaghat, Rajgarh and Bilashpur,

Gujarat : Bhavanagar, Junagarh and Amreli,

Karnataka: Belgaum and Bababudan hills,

Tamil Nadu: Salem.

Uranium deposits : Jaduguda in Singhbhum Thrust Belt (in the state of Jharkhand, formerly part of Bihar) is the first uranium deposit to be discovered in the country in 1951. The Singhbhum Thrust Belt (also known as Singhbhum Copper belt or Singhbhum shear Zone) is a zone of intense shearing and deep tectonization with less than 1km width and known for a number of copper deposits with associated nickel, molybdenum, bismuth, gold, silver etc. It extends in the shape of an arc for a length of about 160 km. This discovery of uranium at Jaduguda in this belt paved the way for intensive exploration work and soon a few more deposits were brought to Light in this area. Some of these deposits like Bhatin, Narwapahar and Turamdih are well known uranium mines of the country. other deposits like Bagjata, Banduhurang and Mohuldih are being taken up for commercial mining operations. Some of the other areas like Garadih, Kanyaluka, Nimdih and Nandup in this belt are also known to contain limited reserves with poor grades. Apart from discoveries in the Singhbhum Thrust Belt, several uranium occurrences have also been found in Cuddapah basin of Andhra Pradesh. These include Lambapur-Peddagattu, Chitrial, Kuppunuru, Tumallapalle, Rachakuntapalle which have significantly contributed towards the uranium reserve base of India. In the Mahadek basin of Meghalaya in NorthEastern part of the country, sandsyone type uranium deposits like Domiasiat, Wahkhyn, Mawsynram provide near-surface flat orebodies amenable to commercial operations. Other areas in Rajsthan, Karnataka and Chattishgarh hold promise for developing into some major deposits.

 

 

 

 

Thorium

The IAEA’s 2005 report estimates India’s reasonably assured reserves of thorium at 319,000 tonnes, but mentions recent reports of India’s reserves at 650,000 tonnes. A government of India estimate, shared in the country’s Parliament in August 2011, puts the recoverable reserve at 846,477 tonnes. The Indian Minister of State V. Narayanasamy stated that as of May 2013, the country’s thorium reserves were 11.93 million tonnes (monazite, having 9-10% ThO2, with a significant majority (8.59 Mt; 72%) found in the three eastern coastal states of Andhra Pradesh (3.72 Mt; 31%), Tamil Nadu (2.46 Mt; 21%) and Odisha (2.41 Mt; 20%). Both the IAEA and OECD appear to conclude that India may possess the largest share of world’s thorium deposits.

 

Iron reserves : Iron ore is a metal of universal use. It is the backbone of modern civilisation. It is the foundation of our basic Industry and is used all over the world. four varieties of iron ore are generally recognized.

(i) Magnetite: This is the best quality of iron ore . It possesses magnetic property and hence is called magnetite. It is found in Andhra Pradesh, Jharkhand, Goa, Kerala, Tamil Nadu and Karnataka.

 

(ii) Haematite:

It contains 60 % to 70 % pure iron and is found in Andhra Pradesh, Jharkhand, Orissa, Chhattisgarh, Goa, Karnataka, Maharashtra and Rajasthan.

(iii) Limonite:

It contains 40 per cent to 60 per cent pure iron. It is of yellow or light brown colour. Damuda series in Raniganj coal field, Garhwal in Uttarakhand, Mirzapur in Uttar Pradesh and Kangra valley of Himachal Pradesh.

(iv) Siderite:

It contains many impurities and has just 40 to 50 per cent pure iron. However, due to presence of lime, it is self fluxing.

 

(4) Oil reserves : India had about 750 Million metric tonne of proven oil reserves as April 2014 or 5.62 billion barrels as per EIA estimate for 2009, which is the second-largest amount in the Asia-Pacific region behind China. Most of India’s crude oil reserves are located in the western coast (Mumbai High) and in the northeastern parts of the country, although considerable undeveloped reserves are also located in the offshore Bay of Bengal and in the state of Rajasthan. The combination of rising oil consumption and fairly unwavering production levels leaves India highly dependent on imports to meet the consumption needs. In 2010, India produced an Average of about 33.69 million metric tonne of crude oil as on April 2010 or 877 thousand barrels per day as per EIA estimate of 2009. As of 2013 India Produces 30% of India’s resources mostly in Rajasthan.

India’s oil sector is dominated by state-owned enterprises, although the government has taken steps in past recent years to deregulate the hydrocarbons industry and support greater foreign involvement. India’s state-owned Oil and Natural Gas Corporation is the largest oil company. Ongc is the leading player in India’s upstream sector, accounting for roughly 75% of the country’s oil output during 2006, as per Indian government estimates. As a net importer of all oil, the Indian Government has introduced policies aimed at growing domestic oil production and oil exploration activities. As part of the effort, the Ministry of Petroleum and Natural Gas crafted the New Exploration License Policy (NELP) in 2000, which permits foreign companies to hold 100% Equity possession in oil and natural gas projects. However, to date, only a handful of oil fields are controlled by foreign firms. India’s downstream sector is also dominated by state-owned entities, though private companies have enlarged their market share in past recent years.

The Indian Strategic Petroleum Reserve (ISPR) is an emergency fuel store of total 5 MMT (million metric tons) or 36.92 MMbbl of strategic crude oil enough to provide 10 days of consumption which are maintained by the Indian Strategic Petroleum Reserves Limited.

Strategic crude oil storages are at 3 underground locations :  in Mangalore, Visakhapatnam and Padur(nr Udupi). All these are located on the east and west coasts of India which are readily accessible to the refineries. These strategic storages are in addition to the existing storages of crude oil and petroleum products with the oil companies and serve in response to external supply disruptions .

In the 2017-18 budget speech by the Indian finance minister Arun Jaitley, it was announced that two more such caverns will be set up Chandikhole in Jajpur district of Odisha and Bikaner in Rajasthan as part of the second phase. This will take the strategic reserve capacity to 15.33 million tons.

Apart from this,India is planning to expand more strategic crude oil facilities in second phase at Rajkot in Gujarat, Padur in and Udupi district of Karnataka.

(5)  Natural gas reserves : Natural gas consists primarily of methane .Propane , butane, pentane and hexane are also present . KG basin, Assam, Gulf of Khambhat, Cuddalore district of Tamil Nadu, Barmer in Rajasthan etc. are natural gas reserves of India.

 

 

 

 

Wind Energy Resources : The development of wind power in India began in the 1990s, and has significantly increased in the last few years. Although a relative newcomer to the wind industry compared with Denmark or the US, domestic policy support for wind power has led India to become the country with the fourth largest installed wind power capacity in the world.

As of March 31, 2016 the installed capacity of wind power in India was 26,769.05 MW, mainly spread across Tamil Nadu (7,269.50 MW), Maharashtra (4,100.40 MW), Gujarat (3,454.30 MW), Rajasthan (2,784.90 MW), Karnataka (2,318.20 MW), Andhra Pradesh (746.20 MW) and Madhya Pradesh (423.40 MW) Wind power accounts for 14% of India’s total installed power capacity. India has set an ambitious target to generate 60,000 MW of electricity from wind power by 2022.

 

 

 

Solar power : Solar power is attractive because it is abundant and offers a solution to fossil fuel emissions and global Climate-change”>Climate Change. Earth receives Solar Energy at the rate of approximately 1,73,000 TW. This enormously exceeds both the current annual global energy consumption rate of about 15 TW, and any conceivable requirement in the future. India is both densely populated and has high solar insolation, providing an ideal combination for solar power in India. India is already a leader in wind power generation. In solar Energy sector, some large projects have been proposed, and a 35,000 km² area of the Thar Desert has been set aside for solar power projects, sufficient to generate 700 to 2,100 GW.

With about 300 clear sunny days in a year, India’s theoretical solar power reception, just on its land area, is about 5 PWh/year (i.e. = 5 trillion kWh/yr ~ 600 TW). The daily average solar energy incident over India varies from 4 to 7 kWh/m2 with about 1500–2000 sunshine hours per year, depending upon location. This is far more than current total energy consumption. The India Energy Portal estimates that if 10% of the land were used for harnessing solar energy, the installed solar capacity would be at 8,000GW, or around fifty times the current total installed power capacity in the country. For example, even assuming 10% conversion efficiency for PV modules, it will still be thousand times greater than the likely electricity demand in India by the year 2015.

National Solar Mission

 

NTPC  Vidyut Vyapar Nigam(NVVN) ,the nodal agency for implementing the first phase of JNNSM , received 418 applications against a requirement of 650 MW(500 MW Solar Thermal and 150 MW Solar PV) for Batch I. Out of this 343 applications were for solar PV and 55 for Solar Thermal. The interest was high in the investor community for solar PV as applications worth 1715 MW (343*5 MW) were received as against a total of 150 MW. 30 bidders were selected through reverse bidding and projects were allocated to companies that offered highest DISCOUNT to base tariff rate of Rs. 17.91/kWh. Projects totaling 610 MW were awarded with 145 MW under solar PV and 470 MW under Solar Thermal. The winning bids for solar PV varied from Rs. 10.95/kWh to Rs. 12.76/kWh and for Solar Thermal it was Rs. 11.14/kWh  in Phase I Batch I. Camelot Enterprises Private Ltd was the lowest bidder and other successful bidders included Mahindra Solar One, Azure Power, SunEdison Energy, Lanco Infratech.  The project capacity under Batch I is 5 MW for solar PV and minimum 5 MW and maximum 100MW for Solar Thermal. By July 2011, negotiations were concluded, PPAs awarded and financial closure achieved for 34 projects.

Under batch II, the project size has been increased up to 20 MW and the base price for solar PV projects is Rs. 15.39/kWh.  NTPC Vidyut Vyapar Nigam (NVVN) received 154 applications for 1915 MW of solar PV projects against a requirement of 350 MW. The results of the bidding for solar PV projects indicate that the grid parity for solar power may not be too far off. The winning bids varied from Rs. 7.49/kWh to Rs. 9.41/kWh. The average bid price for both batch I and II was Rs. 12.15/kWh. French project developer Solairedirect emerged as the lowest bidder and Green Infra Solar the highest bidder. The other successful bidders included companies like Welspun Solar, Azure Power, SunBorne Energy  and Mahindra Solar One. Around 70% and 85% of the allocated capacity under Phase I Batch I and Phase I Batch II respectively is to be implemented in Rajasthan.

LAND RESOURCES : UTILIZATION PATTERN IN INDIA

Land use involves the management and modification of natural Environment or wilderness into built environment such as settlements and semi-natural habitats such as arable fields, pastures, and managed woods. It also has been defined as “the total of arrangements, activities, and input that people undertake in a certain land cover type.

Land is a scarce resource, whose supply is fixed for all practical purposes. At the same time, the demand for land for various competing purposes is continuously increasing with the increase in human population and economic Growth.

Agricultural land: Agricultural land (also agricultural area) denotes the land suitable for agricultural production, both crops and Livestock. It includes net sown area, current fallows and land under miscellaneous trees crops and groves. Agricultural land in India totals approx. 46 %  of the total geographical area in the country. This is the highest among the large and medium-sized countries of the world. This indicates The influence of favourable physical factors (like size, extent of plains and plateaus, etc.) and  The extension of cultivation to a large proportion of the cultivable land. But, because of the large population of the country, the per capita arable land (i.e. land suitable for Agriculture-notes-for-state-psc-exams”>Agriculture) is low: 0.16 hectares against the world average of 0.24 hectares. About 15 per cent of the sown area is multi-cropped.

Non-agricultural land: This includes land under forests and permanent pastures, land under other non-agricultural uses (towns, villages, roads, railways, etc.) and  land classified as cultivable waste as well as barren and uncultivated land of mountain and desert areas.

 

The population continues to grow rapidly in India and great pressure is being placed on arable land resources to provide an adequate supply of food and energy requirements. Even if land resources are never exhausted, on a per capita basis they will decline significantly because they must be divided among more people. Land is one such natural resources of a nation on which the entire superstructure is created. Thus, land use is a synthesis of physical, chemical and biological systems and processes on the one hand and human/societal processes and behavior on the other hand. Land is important not only for producing food stuffs, Cereals, fruits and vegetables for consumption but also for generating surpluses to meet the increasing demands created by rising population and developing Industrial Sector, for laying down the transport Network, Communication lines, for the construction of dwellings and public institutions, etc. Due to unprecedented Population Growth, man has made uses and misuses of land resources causing Environmental Degradation.

Again environmental degradation in developing countries like India, especially its manifestations in the form of Soil erosion, deforestation etc, is often attributed to rapid population growth. It has however been increasingly realized that since these predominantly agricultural countries are undergoing the process of Technological Progress and development, many other factors also modify the relationship between population and land. Changing techniques of production, changes in the pattern of land utilization of natural as well as human resources, industrialization, Urbanization, changing life styles, rising aspirations, change in consumption pattern are some of the macro level factors which make the relationship between population and land use much more complex.

 

 

 

Objective questions

 

Q 1. Which one of the following is an example of non-renewable resources?

  1. Wind
  2. Natural gas
  3. Solar energy
  4. Soil

Q 2. Consider the following statements regarding the reserves of natural resources in India ?

  1. Naharkatia and Kalol are famous for reserves of Crude oil .
  2. Kolar is source of Diamond .
  3. India’s forest cover is 14 % of the total geographical area .

Which of the statements given above is / are correct ?

  1. only 1
  2. only 1 and 2
  3. only 2 and 3
  4. only 1 and 3

Q 3. Which of the statements given below is / are correct ?

  1. Natural gas primarily consists of Butane and methane and propane are also present in minor amount .
  2. Barmer in Rajasthan is natural gas reserve.

Choose the correct answer from the code given below :

  1. only 1
  2. only 2
  3. 1 and 2 both
  4. Neither 1 nor 2

 

Q 4. Which of the following place is well known for Uranium reserves ?

  1. Narwapahar
  2. Koraput
  3. Ratnagiri
  4. Balaghat

 

Q 5. Consider the following statements regarding land use pattern in India :

  1. More than 50 % area is swon area in the country .
  2. Urbanization and industrialization are the factors changing India’s land use pattern

Which of the statements given above is / are correct :

  1. Only 1
  2. Only 2
  3. 1 and 2 both
  4. Neither 1 nor 2

Q 6. Which of the following statements is / are correct ?

  1. India’s geographical location is favourable for solar power .
  2. India ranks first in wind energy production.

Choose the correct answer from the code given below :

  1. Only 1
  2. Only 2
  3. 1 and 2 both
  4. Neither 1 nor 2

Q 7. Which the following is / are non-metallic mineral/s ?

  1. Limestone
  2. Mica
  3. Gypsum
  4. All of the above

 

Q 8. With reference to the Iron ore which of the following statement/s  is / are correct ?

 

  1. Limonite contains max. Percentage of pure iron.
  2. Magnetite is not found in India.

Choose the correct answer from the code given below:

  1. Only 1
  2. Only 2
  3. 1 and 2 both
  4. Neither 1 nor 2

 

Q 9. Which of the following statement is correct ?

 

  1. Neyveli lignite mines are located in Jharkhand.
  2. Singrauli coalfield is in Uttar pradesh .
  3. Kalahandi is famous for Bauxite.
  4. Lohardaga bauxite mine is located in Karnataka.

 

Q 10. Siderite is an ore of :

 

  1. Aluminium
  2. Thorium
  3. Iron
  4. Uranium

 

 

ANSWER KEYS

  1. B
  2. A
  3. B
  4. A
  5. B
  6. A
  7. D
  8. D
  9. C
  10. C

SECOND GREEN REVOLUTION

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SECOND

The main objectives of the SECOND GREEN REVOLUTION are:

(i) To raise agricultural productivity to promote Food Security

(ii) More emphasis on bio-technology

(iii) To promote Agriculture-notes-for-state-psc-exams”>Agriculture“>Sustainable Agriculture

(iv) To become self-sufficient in staple food, pulses, oil seeds, and industrial raw material

(v) To increase the per capita income of the farmers and to raise their standard of living.

 

Drainage System of India

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  • Drainage: Flow of water through well-defined channels. Network of such channels is called a drainage system .
  • Drainage basin: An area drained by a river and its tributaries.
  • Watershed: Boundary line separating one drainage basin from other.
  • River basins are larger watersheds.
  • Drainage pattern of an area depends on the geological time period, nature and structure of rocks, topography, rocks, slope, amount of water and periodicity of flow.

Important drainage patterns:

  1. Dendritic: Resembling the branches of a tree. Eg. Northern Plain rivers
  2. Radial: Originate from a hill and flow in all directions. Eg. Rivers in Amarkantak
  3. Trellis: Primary tributaries parallel to each other and secondary tributaries join them at right angles.
  4. Centripetal: Rivers discharge waters from all directions in a lake or depression

A river drains the water collected from a specific area, which is called its catchment area.

Nearly 77 pc of drainage is towards the Bay of Bengal while about 23 pc is towards the Arabian Sea.

The Himalayan Drainage System

Mainly includes the Ganga, Indus and Brahmaputra river basins.

Over the plains, rivers of this system change the course often. River Kosi is also known as the ‘sorrow of Bihar’ due to flooding by its frequent change of course by deposition of sediments.

Evolution

Geologists believe that a mighty river called Shivalik or Indo-Brahma traversed the entire length of the Himalayas some 5-24 million years ago. Over time this got dismembered into the present three major river systems.

The Indus System

Indus river originates from a glacier near Bokhar Chu in Tibet in the Kailash Mountain range. Known as Singi Khamban (Lion’s mouth) in Tibet. It forms a spectacular gorge near Gilgit in J&K. Enters Pakistan near Chillar in the Dardistan region. Flows only through the Leh distt of J&K.

Smaller tributaries: Shyok, Gilgit, Zaskar, Nubra, Hunza, Shigar, Gasting, Dras. On right bank: Kabul river, Khurram, Tochi, Gomal, Viboa and hte Sangar.

Major tributaries: Satluj, Beas, Ravi, Chenab, Jhelum

Jhelum Origin: Verinag at foot of Pir Pinjal.

Flows through Srinagar and the Wular lake. Joins Chenab near Jhang in Pakistan
Chenab Origin: Two streams (Chandra and Bhaga) which join at Tandi near Keylong in HP.

Largest tributary of Indus. Aka Chandrabhaga. Flows for 1180 KM before entering Pakistan
Ravi Origin: Kullu hills of HP near Rohtang Pass. Enters Pakistan and joins Chenab near Sarai Sidhu
Beas Origin: Beas Kund near Rohtang pass.

Forms gorges at Kati and Largi in the Dhaoladhar range. Meets Satluj near Harike.
Satluj Origin: Rakas lake near Mansarowar in Tibet. Known as Langchen Khambab in Tibet.

Enters India at Ropar. Antecedent river. Bhakra Nangal Project is on this river.

 

The Ganga System

It is the largest river system in India.

Ganga rises in the Gangotri glacier near Gaumukh in the Uttarkashi district. Here it is known as the Bhagirathi. At Devprayag, Bhagirathi meets Alaknanda and is known as Ganga hereafter.

Panchprayag

Vishnu Ganga Joshimath

Dhauli and Vishnu Ganga meet to form Alaknanda

 

Alaknanda Origin: Satopanth glacier above Badrinath. Consists of Dhauli and Vishnu Ganga.
Yamuna Origin: Yamnotri glacier on Banderpunch range. Joins Ganga at Prayag (Allahabad).

RBT: Chambal, Sind, Betwa, Ken

LBT: Hindan, Rind, Sengar, Varuna.

Agra canal
Chambal Origin: Mhow in Malwa plateau.

Gandhi Sagar dam, Rana Pratap Sagar dam and Jawahar Sagar dam.

Famour for Chambal ravines.
Gandak Origin: In Nepal between Dhaulgiri and Mt. Everest. Enters Ganga plain in Champaran and joins Ganga at Sonpur near Patna.

Two streams: Kaliganfak and Trishulganga.

 
Ghaghra Origin: Glaciers of Mapchachungo

Tributaries: Tila, Seti and Beri

Deep gorge at Shishpani

Sarda (Kali) joint it and meet Ganga at Chhapra.
Kosi Origin: North of Mt. Everest in Tibet.

Tributaties: Son Kosi, Tamur Kosi, Arun

Changes course often. Sorrow of Bihar.

 

  • Ganga enters the plains at Haridwar.
  • Left Bank tributaries (LBT): Ramganga, Gomati, Ghaghara, Gandak, Kosi and Mahananda.
  • Right Bank tributaries (RBT): Son
  • Discharges into Bay of Bengal near Sagar island.

Structure, relief and physiographic divisions Three Geological divisions: 1. The peninsular block 2. The Himalayas and other Peninsular Mountains 3. Indo-Ganga-Brahmaputra Plain • Peninsualar block is made of gneisses (metamorphic) and granites (igneous). Six physiographic divisions: 1. The Northern and North-eastern Mountains 2. The Northern Plain 3. The Peninsular Plateau 4. The Indian Desert 5. The Coastal Plains 6. The Islands Northern and North-Eastern Mountains Approximate length of the Great Himalayan range: 2500 KM. Width: 160-400 KM Impact of Himalayas on the climate of India? It can be divided into five sub-divisions: 1. Kashmir (or Northwestern) Himalayas 2. Himachal and Uttaranchal Himalayas 3. Darjeeling and Sikkim Himalayas 4. Arunachal Himalayas 5. Eastern Hills and Mountains Kashmir Himalayas • Ranges: Karakoram, Ladhakh, Zaskar, Pir Pinjal • Glaciers: Baltoro, Siachen • Passes: Zoji La (Great Himalayas), Banihal (Pir Pinjal), Photu La (Zaskar) and Khardung La (Ladakh) • Lakes: (freshwater) Dal and Wular; (saltwater) Pangong Tso and Tso Moriri • Pilgrimage: Vaishno Devi, Amarnath Cave, Charar-e-Sharif • They are also famous for Karewa formations which are useful for the cultivation of Zafran (a local variety of Saffron). Karewas are the thick deposits of glacial clay and other materials embedded with moraines. • Kashmir is located on the banks of Jhelum river. • Meanders is a typical feature associated with the rivers in this region. • In South, there are longitudinal valleys called duns; Jammu dun and Pathankot dun Himachal and Uttarakhand Himalayas • Lies between rivers Ravi and Kali • Drained by two major river systems: Indus and Ganga • Northernmost part is an extension of the Ladakh desert, lies in Spiti. • Ranges: Great Himalayan Range, Lesser Himalayas (Dhaoladhar in HP and Nagtibha in Uttarakhand), Shivalik range • Pilgrimage: Gangotri, Yamunotri, Kedarnath, Badrinath, Hemkund Sahib and the five famous prayags (Refer to Panch Prayag) • Famous for hill stations: Dharamshala, Mussoorie, Shimla, Kaosani; Cantt.: Kasauli, Almora, Lansdowne, Ranikhet • The important distinguishing features of this area are the ‘Shivalik’ and ‘Dun formations’. • Important duns: Chandigarh-Kalka, Nalagarh, Dehra, Harike, Kota • Dehradun is the largest of all duns: Length – 35-45 KM, Width: 22-25 KM • Inhabited with the Bhotia They migrate to higher reaches (Bugyals) in summer and return to the valleys during winters. Darjeeling and Sikkim Himalayas • Between Nepal Himalayas and Bhutan Himalayas. • Fast flowing rivers such as Tista • Peaks: Kanchenjunga • Tribe: Lepcha • Has a mixed population of Nepalis, Bengalis and tribals from Central India. • Importance: Due to the moderate slope, it is best suited for tea plantations. • Duar formations are peculiar to this region. Arunachal Himalayas • From Bhutan Himalayas to Diphu pass in the east. • Direction: Southwest to Northeast • Peaks: Kangtu and Namya Barwa • Rivers: Brahmaputra, Kameng, Subansiri, Dihang, Dibang and Lohit. • These rivers are perennial and have the highest hydro-electric power potential in the country. • Tribes: Monpa, Daffla, Abor, Mishmi, Nishi and Nagas • These communities practice shifting cultivation known as Jhumming. Eastern Hills and Mountains • Direction: North to South • Ranges: Patkai Bum, Naga hills, Manipur hills, Mizo or Lushai hills • These are low hills • Tribes practice Jhum cultivation • Rivers: Barak. Most of the Nagaland rivers form a tributary of Brahmaputra. Rivers in eastern Manipur are the tributaries of Chindwin, which in turn is a tributary of the Irrawady of Myanmar. • Lake: Loktak • Loktak Lake: is an important lake in Manipur which is surrounded by mountains on all sides. It is the largest freshwater lake in northeastern India. Also called the only Floating Lake in the world due to floating masses of organic matter on it. It serves as a source for hydropower generation, irrigation and drinking water supply. • Keibul Kamjao National Park located in the Bishnupur district of Manipur is the only floating park in the world and is an integral part of the Loktak Lake. Home to the endangered Manipur Eld’s Deer or Brow-antlered Deer or Sangai or Dancing Deer. • Mizoram is also known as the ‘Molassis basin’ which is made up of soft unconsolidated deposits. The Northern Plains • Formed by the alluvial deposits of rivers – Indus, Ganga and Brahmaputra. • Length: 3200 KM; Width: 150-300 KM Three main zones: 1. Bhabar 2. Tarai 3. Alluvial Plains (Khadar and Bangar) Bhabar • Narrow belt. 8-10 KM wide. • Paralllel to Shivalik at the break-up of the slope. Hence, streams and rivers deposit heavy rocks (and at times disappear) in this zone. Tarai • South of Bhabar. 10-20 KM wide. • Rivers re-emerge and create marshy and swampy conditions known as Tarai. Alluvial Belt • South of Tarai. • Features of mature stage of fluvial erosional and depositional landforms such as sand bars, meanders, ox-bow lakes and braided channels. Riverine islands in Brahmaputra. • Brahmaputra takes a turn an almost 90 degree turn at Dhubri (Assam) before entering Bangladesh. Peninsular Plateau • Bounded by the Delhi ridge, Rajmahal Hills, Gir range and Cardamom hills. • Made up of a series of patland plateaus: Hazaribagh, Palamu, Ranchi, Malwa, Coimbatore, Karnataka etc. • One of the oldest and most stable landmass of India. • Physiographic Features: Tors, block mountains, rift valleys, spurs, bare rocky structures, hummocky hills and quartzite dykes offering natural sites for water storage. • Black soil in western and northwestern parts. • Bhima fault in this region has frequent seismic activity (Lathur earthquake) • NW part also has ravines and gorges: Chambal, Bhind and Morena. Three broad regions: 1. Deccan Plateau 2. Central Highlands 3. Northwestern Plateau Deccan Plateau • Bordered by Eastern Ghats, Satpura, Maikal range and Mahadeo hills • Important ranges: WG: Sahyadri, Nilgiri, Anaimalai and Caradamom hills; EG: Javadi hills, Palconda range, Nallamala Hills, Mahendragiri hills • EG and WG meet at Nilgiri hills. • Highest peak: Anaimudi (2695 m) on Anaimalai hills; Dodabetta (2637 m) on Nilgiri hills. • Rivers: Mahanadi, Godavari, Krishna, Kaveri etc. Central Highlands • Bounded by the Aravali and Satpura range. • Relic mountains, highly denuded and form discontinuous ranges. • Near Jaisalmer it is covered by the longitudinal sand ridges and crescent-shaped sand dunes called barchans. • Elevation: 700-1000 m • Banas, a tributary of Chambal, originates in the Aravalli. Other tributaries of Yamuna originate from the Vindhyan and Kaimur ranges. • Minerals in Chotanagpur plateau. Northeastern Plateau • Extension of the main Peninsular plateau. • Meghalaya and Karbi Anglong plateau. • Megahalaya plateau: Garo hills, Khasi hills and Jaintia hills (named after the tribals inhabiting the region) • Rich in minerals like coal, iron, sillimanite, limestone and uranium. • Receives maximum rainfall from SW monsoon. Hence, Meghalaya plateau has a highly eroded surface. Cherrapuni and Myswarnam. Indian Desert • Aka Marusthali • Northwest of the Aravali hills • Dotted with longitudinal dunes and barchans. • Low rainfall: >150 mm per year Low vegetation cover • Evidence that this area was under the sea during the Mesozoic era. • Features: mushroom rocks, shifting dunes and oasis. • Rivers are ephemeral: Luni. Brackish lakes. Inland drainage. Coastal Plains Two divisions: 1. Western coastal plains 2. Eastern Coastal Plains Western Coastal Plains • Submerged coastal plain. Hence, a narrow belt. Narrow in middle and broader towards north and south. • Ports: Provides natural conditions for the development of ports and harbours due to submergence. Kandla, Mazagaon (Mumbai), JLN port Navha Sheva, Maramagao, Mangalore, Cochin etc. • Mumbai has the world’s largest natural harbour. • May be divided into: Kachchh and Kathiawar coast in Gujarat, Konkan coast, Goan coast and Malabar coast. • Rivers don’t form delta. • Kayals (Backwaters): Found in the Malabar coast. Used for fishing and inland navigation. Every year Nehru Trophy Vallamkali (boat race) is held in Punnamada Kayal in Kerala. Eastern Coastal Plains • Broader • Emergent coast. Hence, less number of ports and harbours. Chennai, Vizag, Paradwip, Haldia. • Delta formation The Islands Two major Divisions: 1. Andaman and Nicobar 2. Lakshwadeep & Minicoy Andaman and Nicobar • Two major island groups: Ritchie’s archipelago and the Labrynth island. • The group is divided into: Andaman in the North and Nicobar in the South. • Andaman and Nicobar separated by the Ten Degree channel. • Barren Island • Peaks: Saddle Peak (N.Andaman – 738 m), Mt. Diavolo (Middle Andaman – 515 m), Mt. Koyob (S Andaman – 460 m) and Mt. Thuiller (Great Nicobar – 642 m) • Coral deposits found • Convectional rainfalls and equatorial type of vegetation. Lakshadweep and Minicoy • Entire group built of coral deposits. • Total of 36 islands of which 11 are inhabited. • Smallest UT • Minicoy is the largest island • Separated by the 9 Degree Channel, north of which is the Amini Island and to the south Canannore island. • These islands have storm beaches consisting of unconsolidated pebbles, shingles, cobbles and boulders.

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Three Geological divisions:

  1. The peninsular block
  2. The Himalayas and other Peninsular Mountains
  3. Indo-Ganga-Brahmaputra Plain

 

  • Peninsualar block is made of gneisses (metamorphic) and granites (igneous).

Six physiographic divisions:

  1. The Northern and North-eastern Mountains
  2. The Northern Plain
  3. The Peninsular Plateau
  4. The Indian Desert
  5. The Coastal Plains
  6. The Islands

Northern and North-Eastern Mountains

Approximate length of the Great Himalayan range: 2500 KM. Width: 160-400 KM

Impact of Himalayas on the climate of India?

It can be divided into five sub-divisions:

  1. Kashmir (or Northwestern) Himalayas
  2. Himachal and Uttaranchal Himalayas
  3. Darjeeling and Sikkim Himalayas
  4. Arunachal Himalayas
  5. Eastern Hills and Mountains

Kashmir Himalayas

  • Ranges: Karakoram, Ladhakh, Zaskar, Pir Pinjal
  • Glaciers: Baltoro, Siachen
  • Passes: Zoji La (Great Himalayas), Banihal (Pir Pinjal), Photu La (Zaskar) and Khardung La (Ladakh)
  • Lakes: (freshwater) Dal and Wular; (saltwater) Pangong Tso and Tso Moriri
  • Pilgrimage: Vaishno Devi, Amarnath Cave, Charar-e-Sharif
  • They are also famous for Karewa formations which are useful for the cultivation of Zafran (a local variety of Saffron). Karewas are the thick deposits of glacial clay and other materials embedded with moraines.
  • Kashmir is located on the banks of Jhelum river.
  • Meanders is a typical feature associated with the rivers in this region.
  • In South, there are longitudinal valleys called duns; Jammu dun and Pathankot dun

 

Himachal and Uttarakhand Himalayas

  • Lies between rivers Ravi and Kali
  • Drained by two major river systems: Indus and Ganga
  • Northernmost part is an extension of the Ladakh desert, lies in Spiti.
  • Ranges: Great Himalayan Range, Lesser Himalayas (Dhaoladhar in HP and Nagtibha in Uttarakhand), Shivalik range
  • Pilgrimage: Gangotri, Yamunotri, Kedarnath, Badrinath, Hemkund Sahib and the five famous prayags (Refer to Panch Prayag)
  • Famous for hill stations: Dharamshala, Mussoorie, Shimla, Kaosani; Cantt.: Kasauli, Almora, Lansdowne, Ranikhet
  • The important distinguishing features of this area are the ‘Shivalik’ and ‘Dun formations’.
  • Important duns: Chandigarh-Kalka, Nalagarh, Dehra, Harike, Kota
  • Dehradun is the largest of all duns: Length – 35-45 KM, Width: 22-25 KM
  • Inhabited with the Bhotia They migrate to higher reaches (Bugyals) in summer and return to the valleys during winters.

 

Darjeeling and Sikkim Himalayas

  • Between Nepal Himalayas and Bhutan Himalayas.
  • Fast flowing rivers such as Tista
  • Peaks: Kanchenjunga
  • Tribe: Lepcha
  • Has a mixed population of Nepalis, Bengalis and tribals from Central India.
  • Importance: Due to the moderate slope, it is best suited for tea plantations. <India produces about 26 pc of tea in the world; second after China. Also, accounts for 12 pc of tea exports; fourth in the world.>
  • Duar formations are peculiar to this region.

 

Arunachal Himalayas

  • From Bhutan Himalayas to Diphu pass in the east.
  • Direction: Southwest to Northeast
  • Peaks: Kangtu and Namya Barwa
  • Rivers: Brahmaputra, Kameng, Subansiri, Dihang, Dibang and Lohit.
  • These rivers are perennial and have the highest hydro-electric power potential in the country.
  • Tribes: Monpa, Daffla, Abor, Mishmi, Nishi and Nagas
  • These communities practice shifting cultivation known as Jhumming.

 

Eastern Hills and Mountains

  • Direction: North to South
  • Ranges: Patkai Bum, Naga hills, Manipur hills, Mizo or Lushai hills
  • These are low hills
  • Tribes practice Jhum cultivation
  • Rivers: Barak. Most of the Nagaland rivers form a tributary of Brahmaputra. Rivers in eastern Manipur are the tributaries of Chindwin, which in turn is a tributary of the Irrawady of Myanmar.
  • Lake: Loktak
  • Loktak Lake: is an important lake in Manipur which is surrounded by mountains on all sides. It is the largest freshwater lake in northeastern India. Also called the only Floating Lake in the world due to floating masses of organic matter on it. It serves as a source for hydropower generation, irrigation and drinking water supply.
  • Keibul Kamjao National Park located in the Bishnupur district of Manipur is the only floating park in the world and is an integral part of the Loktak Lake. Home to the endangered Manipur Eld’s Deer or Brow-antlered Deer or Sangai or Dancing Deer.
  • Mizoram is also known as the ‘Molassis basin’ which is made up of soft unconsolidated deposits.

The Northern Plains

  • Formed by the alluvial deposits of rivers – Indus, Ganga and Brahmaputra.
  • Length: 3200 KM; Width: 150-300 KM

Three main zones:

  1. Bhabar
  2. Tarai
  3. Alluvial Plains (Khadar and Bangar)

Bhabar

  • Narrow belt. 8-10 KM wide.
  • Paralllel to Shivalik at the break-up of the slope. Hence, streams and rivers deposit heavy rocks (and at times disappear) in this zone.

Tarai

  • South of Bhabar. 10-20 KM wide.
  • Rivers re-emerge and create marshy and swampy conditions known as Tarai.

Alluvial Belt

  • South of Tarai.
  • Features of mature stage of fluvial erosional and depositional landforms such as sand bars, meanders, ox-bow lakes and braided channels. Riverine islands in Brahmaputra.
  • Brahmaputra takes a turn an almost 90 degree turn at Dhubri (Assam) before entering Bangladesh.

 

Peninsular Plateau

  • Bounded by the Delhi ridge, Rajmahal Hills, Gir range and Cardamom hills.
  • Made up of a series of patland plateaus: Hazaribagh, Palamu, Ranchi, Malwa, Coimbatore, Karnataka etc.
  • One of the oldest and most stable landmass of India.
  • Physiographic Features: Tors, block mountains, rift valleys, spurs, bare rocky structures, hummocky hills and quartzite dykes offering natural sites for water storage.
  • Black soil in western and northwestern parts.
  • Bhima fault in this region has frequent seismic activity (Lathur earthquake)
  • NW part also has ravines and gorges: Chambal, Bhind and Morena.

Three broad regions:

  1. Deccan Plateau
  2. Central Highlands
  3. Northwestern Plateau

Deccan Plateau

  • Bordered by Eastern Ghats, Satpura, Maikal range and Mahadeo hills
  • Important ranges: WG: Sahyadri, Nilgiri, Anaimalai and Caradamom hills; EG: Javadi hills, Palconda range, Nallamala Hills, Mahendragiri hills
  • EG and WG meet at Nilgiri hills.
  • Highest peak: Anaimudi (2695 m) on Anaimalai hills; Dodabetta (2637 m) on Nilgiri hills.
  • Rivers: Mahanadi, Godavari, Krishna, Kaveri etc.

Central Highlands

  • Bounded by the Aravali and Satpura range.
  • Relic mountains, highly denuded and form discontinuous ranges.
  • Near Jaisalmer it is covered by the longitudinal sand ridges and crescent-shaped sand dunes called barchans.
  • Elevation: 700-1000 m
  • Banas, a tributary of Chambal, originates in the Aravalli. Other tributaries of Yamuna originate from the Vindhyan and Kaimur ranges.
  • Minerals in Chotanagpur plateau.

 

Northeastern Plateau

  • Extension of the main Peninsular plateau.
  • Meghalaya and Karbi Anglong plateau.
  • Megahalaya plateau: Garo hills, Khasi hills and Jaintia hills (named after the tribals inhabiting the region)
  • Rich in minerals like coal, iron, sillimanite, limestone and uranium.
  • Receives maximum rainfall from SW monsoon. Hence, Meghalaya plateau has a highly eroded surface. Cherrapuni and Myswarnam.

 

Indian Desert

  • Aka Marusthali
  • Northwest of the Aravali hills
  • Dotted with longitudinal dunes and barchans.
  • Low rainfall: >150 mm per year Low vegetation cover
  • Evidence that this area was under the sea during the Mesozoic era.
  • Features: mushroom rocks, shifting dunes and oasis.
  • Rivers are ephemeral: Luni. Brackish lakes. Inland drainage.

 

Coastal Plains

Two divisions:

  1. Western coastal plains
  2. Eastern Coastal Plains

Western Coastal Plains

  • Submerged coastal plain. Hence, a narrow belt. Narrow in middle and broader towards north and south.
  • Ports: Provides natural conditions for the development of ports and harbours due to submergence. Kandla, Mazagaon (Mumbai), JLN port Navha Sheva, Maramagao, Mangalore, Cochin etc.
  • Mumbai has the world’s largest natural harbour.
  • May be divided into: Kachchh and Kathiawar coast in Gujarat, Konkan coast, Goan coast and Malabar coast.
  • Rivers don’t form delta.
  • Kayals (Backwaters): Found in the Malabar coast. Used for fishing and inland navigation. Every year Nehru Trophy Vallamkali (boat race) is held in Punnamada Kayal in Kerala.

 

Eastern Coastal Plains

  • Broader
  • Emergent coast. Hence, less number of ports and harbours. Chennai, Vizag, Paradwip, Haldia.
  • Delta formation

The Islands

Two major Divisions:

  1. Andaman and Nicobar
  2. Lakshwadeep & Minicoy

 

Andaman and Nicobar

  • Two major island groups: Ritchie’s archipelago and the Labrynth island.
  • The group is divided into: Andaman in the North and Nicobar in the South.
  • Andaman and Nicobar separated by the Ten Degree channel.
  • Barren Island
  • Peaks: Saddle Peak (N.Andaman – 738 m), Mt. Diavolo (Middle Andaman – 515 m), Mt. Koyob (S Andaman – 460 m) and Mt. Thuiller (Great Nicobar – 642 m)
  • Coral deposits found
  • Convectional rainfalls and equatorial type of vegetation.

Lakshadweep and Minicoy

  • Entire group built of coral deposits.
  • Total of 36 islands of which 11 are inhabited.
  • Smallest UT
  • Minicoy is the largest island
  • Separated by the 9 Degree Channel, north of which is the Amini Island and to the south Canannore island.
  • These islands have storm beaches consisting of unconsolidated pebbles, shingles, cobbles and boulders.

Population growth, distribution and density

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India is the second most populous country in the world next only to China. On March 1, 2011 the total Population of India was at 1.247 billion. This accounted for 17.5% of the world’s total population. In other words, about every sixth person in the world there is an Indian. China, the most populous country of the world, is a step ahead of us as every fifth person in the world there is a Chinese. While India possesses only 2.42% of the world’s total land area, she is required to sustain almost 17.5% of the world’s population.

Two components of https://exam.pscnotes.com/population-Growth“>Population Growth are: Natural growth: It is analysed by assessing the crude birth and death rates. Induced growth: It is assessed by the volume of inward and outward movement of people in any given area. There are four phases of population growth in India. The period from 1901-1921 is referred to as a period of stagnant growth of India’s population. The high birth rate was counterbalanced by high death rate. The decades 1921-1951 are referred to as the period of steady population growth. The mortality rate started showing downward trend as a result of improvement in general Health and sanitation conditions after 1921.

The density of population is expressed as the number of persons per square kilometre. According to 2011 census, the density of population in India is 382 persons per square kilometre. Over the last 100 years density has increased more than four times.

Density and its variation across states can be accessed by the following table:-

State Area Sq. Km Density 2011 Density 2001 Density

2011
– India (Average) 3,287,240 382 324
1 Delhi 1,483 11,320 9,340
2 Chandigarh 114 9,258 7,900
3 Puducherry 490 2,547 2,034
4 Daman and Diu 111 2,191 1,413
5 Lakshadweep 30 2,149 1,895
6 Bihar 94,163 1,106 881
7 West Bengal 88,752 1,028 903
8 Kerala 38,852 860 819
9 Uttar Pradesh 240,928 829 690
10 Dadra and Nagar Haveli 491 700 449
11 Haryana 44,212 573 478
12 Tamil Nadu 130,060 555 480
13 Punjab 50,362 551 484
14 Jharkhand 79,716 414 338
15 Assam 78,438 398 340
16 Goa 3,702 394 364
17 Maharashtra 307,713 365 315
18 Tripura 10,486 350 305
19 Karnataka 191,791 319 276
20 Gujarat 196,244 308 258
21 Andhra Pradesh 275,045 308 277
22 Orissa 155,707 270 236
23 Madhya Pradesh 308,252 236 196
24 Rajasthan 342,239 200 165
25 Uttarakhand 53,483 189 159
26 Chhattisgarh 135,192 189 154
27 Meghalaya 22,429 132 103
28 Manipur 22,327 128 103
29 Himachal Pradesh 55,673 123 109
30 Nagaland 16,579 119 120
31 Sikkim 7,096 86 76
32 Jammu and Kashmir 222,236 56 46
33 Mizoram 21,081 52 42
34 Andaman and Nicobar Islands 8,249 46 43
35 Arunachal Pradesh 83,743 17 13