Water Management – Institutional Reforms, Conservation Efforts, etc.

Places in news: Sardar Sarovar Dam

Note4Students

From UPSC perspective, the following things are important :

Prelims level: Sardar Sarovar Dam

Mains level: NA

The Sardar Sarovar Dam is providing irrigation water in summer for the first time in history.

Sardar Sarovar Dam

  • The Sardar Sarovar Narmada Dam is a terminal dam built on the Narmada river at Kevadia in Gujarat’s Narmada district.
  • Four Indian states, Gujarat, Madhya Pradesh, Maharashtra and Rajasthan, receive water and electricity supply from the dam.
  • The foundation stone of the project was laid out by Prime Minister Jawaharlal Nehru on 5 April 1961.
  • The project took form in 1979 as part of a development scheme funded by the World Bank through their International Bank for Reconstruction and Development, to increase irrigation and produce hydroelectricity
  • Called the ‘lifeline of Gujarat’, it usually has no water for irrigation during summers.

Answer this PYQ in the comment box:

Q.Which one of the following pairs is not correctly matched?

 

Dam/Lake River

(a) Govind Sagar: Satluj

(b) Kolleru Lake: Krishna

(c) Ukai Reservoir: Tapi

(d) Wular Lake: Jhelum

A successful model of river water sharing

  • River Narmada is a classic case of Integrated River Basin Planning, Development, and Management, with water storage available in all major, medium, and minor dams on the main river and its tributaries.
  • Its water is shared amongst four party states – Gujarat, Rajasthan, Madhya Pradesh and Maharashtra — in the ratio stipulated by the 1979 award of the Narmada Water Dispute Tribunal.

How has it saved water for summers?

  • During the monsoon from July to October, the reservoir operation is well synchronized with the rain forecast in the catchment area.
  • The strategic operation of River Bed Power House (RPBH) ensures that minimum water flows downstream into the sea and maximum water is used during the dam overflow period, which is not calculated in the annual water share.
  • These measures help in maximizing the annual allocation of water share.
  • Similarly, in non-monsoon months, the measures for efficient use of the allocated share typically include minimizing the conventional and operational losses.
  • It includes: avoiding water wastage, restricting water-intensive perennial crops, adopting of Underground Pipelines (UGPL); proper maintenance and operation of canals on a rotational basis.

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Wildlife Conservation Efforts

Dihing Patkai is Assam’s 7th National Park

Note4Students

From UPSC perspective, the following things are important :

Prelims level: Dihing Patkai NP

Mains level: NA

The Assam government has notified Dihing Patkai as a National Park, four days after creating the 422-sq. km Raimona National Park in western Assam’s Kokrajhar district.

Dihing Patkai NP

  • Dihing Patkai, in focus a year ago for illegal coal mining in the vicinity, encompasses the erstwhile Dehing Patkai Wildlife Sanctuary, the Jeypore Reserve Forest and the western block of the Upper Dihing Reserve Forest.
  • The 234.26-sq. km Dihing Patkai straddling eastern Assam’s Dibrugarh and Tinsukia districts is a major elephant habitat and 310 species of butterflies have been recorded there.
  • The park has 47 species each of reptiles and mammals, including the tiger and clouded leopard.

Answer this PYQ in the comment box:

Q.Which one of the following National Parks has a climate that varies from tropical to subtropical, temperate and arctic?

(a) Khangchendzonga National Park

(b) Nandadevi National Park

(c) Neora Valley National Park

(d) Namdapha National Park

NPs in Assam

  • Assam now has the third most National Parks after the 12 in Madhya Pradesh and nine in the Andaman and Nicobar Islands.
  • The five older National Parks in the State are Kaziranga, Manas, Nameri, Orang and Dibru-Saikhowa.
  • Kaziranga and Manas are UNESCO World Heritage Sites.
  • They are also tiger reserves along with Nameri and Orang.

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Wildlife Conservation Efforts

Degradation of Aravalis

Note4Students

From UPSC perspective, the following things are important :

Prelims level: Aravali Range and its geophysics

Mains level: NA

The Supreme Court has ordered the Haryana government to take “all essential measures” to remove encroachments, including some residential constructions, in the ecologically fragile Aravali forest land near a village.

Aravali Range

  • The Aravali is a mountain range in Northwestern India, running approximately 670 km in a southwest direction, starting near Delhi, passing through southern Haryana and Rajasthan, and ending in Gujarat.
  • The highest peak is Guru Shikhar at 1,722 meters.
  • The Aravalli Range, an eroded stub of ancient mountains, is the oldest range of fold mountains in India.
  • The natural history of the Aravalli Range dates back to times when the Indian Plate was separated from the Eurasian Plate by an ocean.
  • Three major rivers and their tributaries flow from the Aravalli, namely Banas and Sahibi rivers which are tributaries of Yamuna, as well as Luni River which flows into the Rann of Kutch.
  • The Sariska-Delhi leopard wildlife corridor is a 200 km long important biodiversity and wildlife corridor which runs from the Sariska Tiger Reserve in Rajasthan to Delhi Ridge.

Threats to its existence

  • Ecological degradation in the Aravalli region is in an alarming situation.
  • This is due to the increasing population of humans and cattle, injudicious use of natural resources, unscientific mining, uncontrolled grazing, and felling of trees.

Answer this PYQ in the comment box:

Q.With reference to the river Luni, which one of the following statements is correct?

(a) It fl ows into Gulf of Khambhat

(b) It fl ows into Gulf of Kuchchh

(c) It fl ows into Pakistan and merges with a tributary of Indus

(d) It is lost in the marshy land of the Rann of Kuchchh

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Renewable Energy – Wind, Tidal, Geothermal, etc.

Kinnaur Hydroelectric Project

Note4Students

From UPSC perspective, the following things are important :

Prelims level: Kinnaur Hydroelectric Project

Mains level: Hydel energy and its feasiblity

The people of Kinnaur, Himachal Pradesh have been protesting against the proposed 804-megawatt Jangi Thopan Powari hydroelectricity project (JTP HEP) over the Satluj since April 2021.

Kinnaur Hydroelectric Project

  • The run-of-the-river (ROR) project envisages the construction of a concrete gravity dam of ±88 metres high above the deepest foundation level across river Satluj near Jangi village.
  • The diversion of water will involve the construction of a 12-km-long tunnel.
  • The tentative land requirement for the project is 295.93 hectares, out of which 270.43 ha is forest land and 25.5 ha is private.
  • Construction of the dam will result in the submergence of about 156.2917 ha of land, out of which 143.2093 ha is forest land and 13.0824 ha is private.

Answer this PYQ in the comment box:

Q.What is common to the places known as Aliyar, Isapur and Kangsabati? (CSP 2017)

(a) Recently discovered uranium deposits

(b) Tropical rain forests

(c) Underground cave systems

(d) Water reservoirs

Why are people protesting?

  • Kinnaur district is mainly marked by its cold desert, tribal population, fragile topography, rich and diverse culture, apple orchards, off-season vegetables and the Satluj river.
  • The river has been dammed at multiple places along the valley to create an additional feature to Kinnaur’s identity as Himachal’s hydropower hub, which locals believe is a malediction.
  • An integral part of the old Hindustan-Tibetan Route, Jangram Valley, lies on the right bank of the Satluj river in the district.
  • This is not the first time that the cold desert has witnessed such a contestation.

Sutlej is oveloaded

  • The Satluj has taken the biggest load of state hydropower ambition since the early 90s. Out of the total installed capacity, 56 per cent (5720MW) is done in the Satluj basin.
  • According to the State of the Rivers of Himachal Pradesh Report 2017:
  • In other words, 92 per cent of the river will either be flowing through tunnels or will be part of reservoirs.
  • Such a cumulative scale of disturbance with the river’s natural state drastically impacted the life, livelihood and ecology in the Satluj basin.

Why need hydroelectric projects?

  • Hydropower is a necessary choice for the nation’s clean energy transition.
  • In purely technological terms, hydropower projects are an engineering marvel and generate clean, reliable electricity.
  • HEPs are not viable just from the local livelihood and environmental point of view but they have also failed on the financial viability side.

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Water Management – Institutional Reforms, Conservation Efforts, etc.

‘Sea Snot’ outbreak in Turkey

Note4Students

From UPSC perspective, the following things are important :

Prelims level: Sea Snot, Marmara Sea

Mains level: Algal bloom

There has been growing environmental concern in Turkey over the accumulation of ‘sea snot’, a slimy layer of grey or green sludge in the country’s seas, which can cause considerable damage to the marine ecosystem.

What is ‘Sea Snot’?

  • ‘Sea snot’ is marine mucilage that is formed when algae are overloaded with nutrients as a result of water pollution combined with the effects of climate change.
  • A ‘sea snot’ outbreak was first recorded in the country in 2007. Back then, it was also spotted in the Aegean Sea near Greece.
  • But the current outbreak in the Sea of Marmara is by far the biggest in the country’s history.
  • The nutrient overload occurs when algae feast on warm weather caused by global warming. Water pollution adds to the problem.
  • Environmental experts have said that the overproduction of phytoplankton caused by climate change and the uncontrolled dumping of household and industrial waste into the seas has led to the present crisis.

Where has it been found?

  • Turkey’s Sea of Marmara, which connects the Black Sea to the Aegean Sea, has witnessed the largest outbreak of ‘sea snot’.
  • The sludge has also been spotted in the adjoining Black and Aegean seas.

How badly can the crisis affect the marine ecosystem?

  • The growth of the mucilage, which floats upon the surface of the sea like brown phlegm, is posing a severe threat to the marine ecosystem of the country.
  • Divers have said that it has caused mass deaths among the fish population, and also killed other aquatic organisms such as corals and sponges.
  • The mucilage is now covering the surface of the sea and has also spread to 80-100 feet below the surface.
  • If unchecked, this can collapse to the bottom and cover the sea floor, causing major damage to the marine ecosystem.
  • Over a period of time, it could end up poisoning all aquatic life, including fishes, crabs, oysters, mussels and sea stars.

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Historical and Archaeological Findings in News

Places in news: Pandav Leni Complex

Note4Students

From UPSC perspective, the following things are important :

Prelims level: Pandav leni complex

Mains level: Ancient buddhist cave architecture

The Archaeological Survey of India (ASI) has found three more caves in the Trirashmi Buddhist cave complex, also known as Pandav Leni, near Nashik, Maharashtra.

Answer this PYQ first, in the comment box:

Q.There are only two known examples of cave paintings of the Gupta period in ancient India. One of these is paintings of Ajanta caves. Where is the other surviving example of Gupta paintings?

(a) Bagh caves

(b) Ellora caves

(c) Lomas Rishi cave

(d) Nasik caves

Pandav Leni Complex

  • The Pandav Leni Complex or Nasik Caves are a group of 23 caves carved between the 1st century BCE and the 3rd century CE.
  • Also called Trirashmi Buddhist caves, this complex was first documented in 1823 by Captain James Delamaine and is now an ASI- protected site.
  • Though additional sculptures were added up to about the 6th century, it is a major landmark of changes in Buddhist devotional practices.
  • Most of the caves are viharas except for Cave 18 which is a chaitya of the 1st century BCE.
  • The style of some of the elaborate pillars or columns, for example in caves 3 and 10, is an important example of the development of the form.
  • The “Pandavleni” name sometimes given to the Nasik Caves has nothing to do with the characters Pandavas, characters in the Mahabharata epic.
  • Other caves in the area are Karla Caves, Bhaja Caves, Patan Cave, and Bedse Caves.

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Global Geological And Climatic Events

Eruption of Mount Nyiragongo

Note4Students

From UPSC perspective, the following things are important :

Prelims level: Mount Nyiragongo

Mains level: Not Much

Thousands have fled a volcanic eruption in the Democratic Republic of Congo from Mount Nyiragongo on the outskirts of Goma City.

These were some volcanoes in news this year:

Mount Vesuvius, Taal Volcano, La Soufriere

Mount Nyiragongo

  • Mount Nyiragongo is an active stratovolcano with an elevation of 3,470 m (11,385 ft) in the Virunga Mountains associated with the Albertine Rift.
  • The main crater is about 2km wide and usually contains a lava lake.
  • The crater presently has two distinct cooled lava benches within the crater walls.
  • It is one of the 16 Decade Volcanoes.
  • Nyiragongo’s lava lake has at times been the most voluminous known lava lake in recent history. The depth of the lava lake varies considerably.
  • Nyiragongo and nearby Nyamuragira are together responsible for 40 percent of Africa’s historical volcanic eruptions.

Answer this PYQ in the comment box:

Q.Which of the following adds/add carbon dioxide to the carbon cycle on the planet Earth?

  1. Volcanic action
  2. Respiration
  3. Photosynthesis
  4. Decay of organic matter

Select the correct answer using the code given below:

(a) 1 and 3 only

(b) 2 only

(c) 1, 2 and 4 only

(d) 1, 2, 3 and 4

What are Decade Volcanoes?

  • The Decade Volcanoes are 16 volcanoes identified by the International Association of Volcanology and Chemistry of the Earth’s Interior (IAVCEI).
  • They are considered worthy of particular study in light of their history of large, destructive eruptions and proximity to densely populated areas.
  • They are named Decade Volcanoes because the project was initiated in the 1990s as part of the United Nations-sponsored International Decade for Natural Disaster Reduction.

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Climate Change Impact on India and World – International Reports, Key Observations, etc.

World’s largest iceberg breaks off from Antarctica

Note4Students

From UPSC perspective, the following things are important :

Prelims level: A-76 Iceberg

Mains level: Impact of climate changes on Cryosphere

A huge ice block has broken off from western Antarctica into the Weddell Sea, becoming the largest iceberg in the world and earning the name A-76.

Answer this PYQ in the comment box:

Q.On the planet earth, most of the freshwater exists as ice caps and glaciers. Out of the remaining freshwater, the largest proportion:

(a) is found in the atmosphere as moisture and clouds

(b) is found in freshwater lakes and rivers

(c) exists as groundwater

(d) exists as soil moisture

A-76 Iceberg

  • A-76 is the latest in a series of large ice blocks to dislodge in a region acutely vulnerable to climate change, although scientists said in this case it appeared to be part of a natural polar cycle.
  • The iceberg, measuring around 170 km long and 25 km wide, with an area of 4,320 sq km is now floating in the Weddell Sea.
  • Slightly larger than the Spanish island of Majorca, A-76 had been monitored by scientists since it began to separate from the Ronne Ice Shelf.
  • It joins the previous world’s largest title holder A-23A — approximately 3,880 sq. km. in size — which has remained in the same area since 1986.
  • A-76 was originally spotted by the British Antarctic Survey and the calving — the term used when an iceberg breaks off — was confirmed using images from the Copernicus satellite.

Note: An iceberg is a large piece of freshwater ice that has broken off a glacier or an ice shelf and is floating freely in open water.

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Contention over South China Sea

Places in news: Paracel Islands

Note4Students

From UPSC perspective, the following things are important :

Prelims level: Map marking of Paracel Islands

Mains level: South China Sea Row

A United States warship sailed through the Paracel Islands in the disputed South China Sea.

Paracel Islands

  • The Paracel Islands, also known as the Xisha Islands are a disputed archipelago in the South China Sea.
  • The archipelago includes about 130 small coral islands and reefs, most grouped into the northeast Amphitrite Group or the western Crescent Group.
  • They are distributed over a maritime area of around 15,000 square kilometers with a land area of approximately 7.75 square kilometers.
  • The archipelago includes Dragon Hole, the deepest underwater sinkhole in the world.
  • It is surrounded by productive fishing grounds and a seabed with potential, but as yet unexplored, oil and gas reserves.

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Modern Indian History-Events and Personalities

6 UNESCO heritage sites added in India

Note4Students

From UPSC perspective, the following things are important :

Prelims level: Sites mentioned in the news

Mains level: Not Much

Six sites have been added to India’s tentative list of UNESCO world heritage sites.

Which are the 6 sites?

  1. Ganga ghats in Varanasi
  2. Temples of Kancheepuram in Tamil Nadu
  3. Satpura Tiger Reserve in Madhya Pradesh
  4. Maratha military architecture in Maharashtra
  5. Hire Bengal megalithic site in Karnataka and
  6. Bhedaghat-Lametaghat of Narmada Valley in Madhya Pradesh

[1] Ghats of Varanasi

  • The Ganges riverfront of Varanasi, Uttar Pradesh, has been vying for the UNESCO tag for several years now.
  • The Ganga river with its riverfront ghats also fulfil the criteria of Cultural Landscapes as designated in Article 1 of the Convention and specifically that of a cultural landscape/
  • It retains an active social role in contemporary society closely associated with the traditional way of life, and in which the evolutionary process is still in progress.

[2] Temples of Kanchipuram

  • Synonymous with spirituality, serenity, and silk, the temple town of Kanchipuram in Tamil Nadu, is dotted with ancient temples that are architectural marvels and a visual treat, states incredibleindia.org.
  • Situated on the banks of River Vegavathi, this historical city once had 1,000 temples, of which only 126 (108 Shaiva and 18 Vaishnava) now remain.
  • Its rich legacy has been the endowment of the Pallava dynasty, which made the region it’s capital between the 6th and 7th centuries and lavished upon its architectural gems that are a fine example of Dravidian styles.

[3] Satpura Tiger Reserve

  • Located in Madhya Pradesh, the Satpura National Park is home to 26 species of the Himalayan region including reptiles, and 42 species of Nilgiri areas.
  • It is the largest tiger-occupied forest and also has the largest tiger population.
  • The website also states the place has more than 50 rock shelters with paintings that are 1500 to 10,000 years old.

[4] Maratha Military Architecture in Maharashtra

  • There are 12 forts in Maharashtra dating back to the era of the 17th-century Maratha king Chhatrapati Shivaji.
  • They are namely Shivneri (the birthplace of Shivaji); Raigad (the capital fort rebuilt for the coronation of the Maratha king), Torna (the first fort of the Maratha empire), Rajgad, Salher-Mulher, Panhala, Pratapgad, Lohagad, Sindhudurg, Padmadurga (Kasa), Vijaydurg and Kolaba.
  • This highlight how the formation of Military Landscape in the form of hill and sea forts as a response to hilly terrain in the area is of outstanding universal value.

[5] Megalithic site of Hire Benkal

  • The 2,800-years-old megalithic site of Hire Benkal in Karnataka is one of the largest prehistoric megalithic settlements where some funerary monuments are still intact.
  • The granite structures are burial monuments that may also have served many ritual purposes.
  • Due to the extremely valuable collection of Neolithic monuments, the site was proposed for recognition.

[6] Bhedaghat-Lametaghat in Narmada Valley- Jabalpur

  • Bhedaghat, often referred to as the Grand Canyon of India, is a town in the Jabalpur district, around 25 km from Jabalpur.
  • It is known for its marble rocks and their various morphological forms on either side of the Narmada River which flows through the gorge states whcunesco.org.
  • It has also been observed that the magical marble mountains assume different colours and even shapes of animals and other living forms as one moves through them.
  • Several dinosaur fossils have been found in the Narmada valley, particularly in Bhedaghat-Lametghat area of Jabalpur. In 1828, the first Dinosaur fossil was collected from Lameta Bed by William Sleeman.
  • River Narmada narrows down on its way through marble rocks and plunges in a waterfall giving out the appearance of a smoke cascade.

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Climate Change Impact on India and World – International Reports, Key Observations, etc.

Places in news: Leang Sakapao Caves

Note4Students

From UPSC perspective, the following things are important :

Prelims level: Leang Sakapao Caves

Mains level: Not Much

Researchers have reported that Pleistocene-era rock paintings dating back to 45,000-20,000 years ago in cave sites in southern Sulawesi, on the Indonesian island of Sulawesi, are weathering at an alarming rate.

Have you ever found the mention of ‘Altamira Caves’ in your NCERTs?

Leang Sakapao Caves

  • This cave art of Sulawesi is much older than the prehistoric cave art of Europe.
  • The artwork in the area includes what is believed to be the world’s oldest hand stencil (almost 40,000 years ago), created by pressing the hand on a cave wall and spraying wet red-mulberry pigments over it.
  • A nearby cave features the world’s oldest depiction of an animal, a warty pig painted on the wall 45,500 years ago.

Impact of climate change

  • The artwork made with pigments was decaying due to a process known as haloclasty, which is triggered by the growth of salt crystals due to repeated changes in temperature and humidity.
  • This is caused by alternating wet and dry weather in the region.
  • Indonesia has also experienced several natural disasters in recent years, which have quickened the process of deterioration.

Note:

Mark all islands of the Indonesian Archipelago in your Atlas.

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Foreign Policy Watch: India-Iran

Farzad B Gas Field

Note4Students

From UPSC perspective, the following things are important :

Prelims level: Farzad B Gas Field

Mains level: Not Much

Iran gave the Farzad B gas field to a domestic gas producer in a setback move to India.

Farzad B Gas Field

  • Farzad-B is an off-shore natural gas field 20 kilometres off Farsi Island in Iran.
  • The gas field was discovered in 2008 by a consortium of three Indian companies, led by the state-owned ONGC Videsh with a 40% stake; the other companies were Indian Oil Corporation (40%) and Oil India (20%).

Deal soured after US sanctions

  • Negotiations between the consortium and the National Iranian Oil Company (NIOC) to develop the gas field stalled due to secondary sanctions against Iran by the US and the European Union in the early 2010s.
  • Following the lifting of sanctions after the Joint Comprehensive Plan of Action was signed in July 2015 the consortium was close to an agreement to invest $US5 billion to develop the gas field.
  • After the United States withdrawal from the JCPOA in May 2018, and the reinstatement of U.S. sanctions against Iran, the negotiations between the consortium and NIOC broke down.

Consider the question “Balancing the contrasts has been the basis of India’s relations with Iran. Comment.”

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Climate Change Negotiations – UNFCCC, COP, Other Conventions and Protocols

Environment Appraisal Committee allows Great Nicobar plan to advance

Note4Students

From UPSC perspective, the following things are important :

Prelims level: Not much

Mains level: Paper 3- EAC allows Great Nicobar plan to advance

About the Great Nicobar plan

  • The Environment Appraisal Committee (EAC) – Infrastructure I of the Ministry of Environment, Forest and Climate Change (MoEFCC) has flagged serious concerns about NITI Aayog’s ambitious project for Great Nicobar Island.
  • The EAC was responding to ‘pre-feasibility’ report, ‘Holistic Development of Great Nicobar Island at Andaman and Nicobar Islands’.
  • The report is prepared for the NITI Aayog by the Gurugram-based consulting agency.
  • The proposal includes an international container transshipment terminal, a greenfield international airport, a power plant and a township complex spread over 166 sq. km. and is estimated to cost ₹75,000 crore.
  • The committee has, however, removed the first hurdle faced by the project.
  • It has recommended it “for grant of terms of reference (TOR)” for Environmental Impact Assessment (EIA) studies, which in the first instance will include baseline studies over three months.

What the EAC said

  • The committee noted that the site selection for the port had been done mainly on technical and financial criteria, ignoring the environmental aspects.
  • It has now asked for an independent study/ evaluation for the suitability of the proposed port site with specific focus on Leatherback Turtle, Nicobar Magapode and Dugong.
  • It highlighted the need for an independent assessment of terrestrial and marine biodiversity, a study on the impact of dredging, reclamation and port operations, including oil spills.
  • It has also highlighted the need for studies of alternative sites for the port with a focus on environmental and ecological impact,  analysis of risk-handling capabilities, a seismic and tsunami hazard map, a disaster management plan, an assessment of the cumulative impact, and a hydro-geological study to assess impact on round and surface water regimes.
  • The committee has also asked for details of the corporate environment policy of the implementing agency — whether the company has an environment policy, a prescribed standard operating procedure to deal with environmental and forest violations, and a compliance management system.

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Sri Lanka’s Constitution – Strides in the Right Direction

No mass nesting of Olive Ridley turtles at Rushikulya in Odisha this year

Note4Students

From UPSC perspective, the following things are important :

Prelims level: Olive Ridley turtle

Mains level: Paper 3- Mass nesting of Olive Ridley turtles

No mass nesting this year

  • The annual spectacle of the mass nesting of millions of Olive Ridley sea turtles near the Rushikulya river mouth in Odisha is likely to be missed this year, as the time for it is almost over.
  • It’s been around one month since the mass nesting of last year.
  • If they do skip the beach, this won’t be the first time.
  • In 2002, 2007, 2016 and 2019, the turtles had not shown up at Rushikulya.
  • The Rushikulya river mouth is considered the second-biggest rookery in India after Gahirmatha.
  • Mass nesting in the Gahirmatha marine sanctuary occurred from March 9-23, 2021 and over 349,000 eggs were laid during this period.

What could explain the miss in mass nesting

  • It is a natural phenomenon. During some years, they did not turn up for mass nesting even though a huge number had congregated in the sea.
  • Beach erosion might be one of the causes for the turtles staying away this year.

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Global Geological And Climatic Events

La Soufriere volcanic eruption

Note4Students

From UPSC perspective, the following things are important :

Prelims level: La Soufriere

Mains level: Not Much

Sulphur dioxide (SO2) emissions from La Soufriere volcano eruption in the Caribbean have reached all the way to India.

Why in news?

  • Its eruption has sparked fear of increased pollution levels in the northern parts of India and acid rain.
  • Volcanic plumes can cause aviation and air quality hazards.

La Soufriere

  • It is an active stratovolcano on the Caribbean island of Saint Vincent in Saint Vincent and the Grenadines.
  • It is the highest peak in Saint Vincent and has had five recorded explosive eruptions since 1718.

Impact of such eruptions

  • Volcanic emissions reaching the stratosphere can have a cooling effect on global temperatures.
  • The most significant climate impacts from volcanic injections into the stratosphere come from the conversion of sulphur dioxide to sulphuric acid, which condenses rapidly in the stratosphere to form fine sulphate aerosols.
  • The aerosols increase the reflection of radiation from the Sun back into space, cooling the Earth’s lower atmosphere or troposphere.

Try this PYQ:

Q.Which of the following adds/add carbon dioxide to the carbon cycle on the planet Earth?

  1. Volcanic action
  2. Respiration
  3. Photosynthesis
  4. Decay of organic matter

Select the correct answer using the code given below:

(a) 1 and 3 only

(b) 2 only

(c) 1, 2 and 4 only

(d) 1, 2, 3 and 4

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Wildlife Conservation Efforts

Mahendragiri Hills

Note4Students

From UPSC perspective, the following things are important :

Prelims level: Mahendragiri Hills

Mains level: Biosphere reserves in India

The Odisha government has proposed a second biosphere reserve in the southern part of the state at Mahendragiri, a hill ecosystem having a rich biodiversity.

The 5,569-square kilometre Similipal Biosphere Reserve is Odisha’s first such reserve and was notified May 20, 1996.

Mahendragiri Hills

  • Mahendragiri is a mountain in the Rayagada subdivision of the district of Gajapati, Odisha, India.
  • It is situated amongst the Eastern Ghats at an elevation of 1,501 metres.
  • The hill and its surrounding areas are recognized as a biodiversity hot spot due to numerous medicinal plants and other species that are found here.
  • Mahendragiri is inhabited by the Soura people, a particularly vulnerable tribal group as well as the Kandha tribe.

Try this PYQ:

Q.From the ecological point of view, which one of the following assumes importance in being a good link between the Eastern Ghats and the Western Ghats? (CSP 2018)

(a) Sathyamangalam Tiger Reserve

(b) Nallamala Forest

(c) Nagarhole National Park

(d) Seshachalam Biosphere Reserve

Why designate it as a biosphere reserve?

  • The area of the proposed Mahendragiri Biosphere Reserve is around 470,955 hectares and is spread over Gajapati and Ganjam districts in the Eastern Ghats.
  • The hill ecosystem acts as a transitional zone between the flora and fauna of southern India and the Himalayas, making the region an ecological estuary of genetic diversities.
  • The rich flora in Mahendragiri represents 40 per cent of the reported flora of Odisha, with around 1,358 species of plants.

Back2Basics:  Biosphere Reserves

  • A biosphere reserve is an area of land or water that is protected by law in order to support the conservation of ecosystems, as well as the sustainability of mankind’s impact on the environment.
  • Each reserve aims to help scientists and the environmental community figure out how to protect the world’s plant and animal species while dealing with a growing population and its resource needs.
  • To carry out the complementary activities of biodiversity conservation and sustainable use of natural resources, biosphere reserves are traditionally organized into 3 interrelated zones, known as:
    1. the core area
    2. the buffer zone and
    3. a transition zone or ‘area of cooperation

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J&K – The issues around the state

Places in news: Chenab Arch Bridge

Note4Students

From UPSC perspective, the following things are important :

Prelims level: Chenab Arch Bridge

Mains level: Not Much

A half-a-kilometre long arch, the defining feature of the world’s highest railway bridge over river Chenab, is set to be completed today.

Chenab Arch Bridge

  • The bridge is part of an ambitious 272-km rail link project and is being constructed by the Northern Railway at an estimated cost of ₹28,000 crores.
  • The bridge will be able to withstand earthquakes with a magnitude of up to eight and high-intensity blasts.
  • The bridge, which will include a 14-metre dual carriageway and a 1.2-metre-wide central verge, will have a design speed of around 100 kilometres per hour with a lifespan of 120 years.

Its inception

  • The preparations of the rail link began in 2002 and the initial plan was to connect Kashmir’s northernmost city Baramulla to New Delhi.
  • Work on the bridge started again in July 2017 with the aim of completing the construction by the end of 2019 but due to contractual issues in 2018, it was delayed.
  • Steel was specifically chosen for the construction of the bridge as it will make the project more economical.
  • The metal will also be able to resist temperatures of minus 20 degree Celsius and wind speeds of above 200 kilometres per hour.

Significance

  • A railway bridge like this, with this kind of geography, has not been made anywhere in the world, according to the Railways.
  • It will symbolise the Kashmir rail link, to be ready for at least a century.
  • In other words, a train from Kanyakumari can reach all the way to Kashmir uninterrupted.
  • The cable crane that will do the job of completing the arch itself measures around 900 meters and is said to be the longest in the world, made especially for this project.

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Indian Army Updates

Joint Logistics Node (JLN)

Note4Students

From UPSC perspective, the following things are important :

Prelims level: Joint Logistics Node

Mains level: Paper 3- Joint Logistics Node

As part of measures to boost tri-service integration and resource optimisation, Chief of Defence Staff General has operationalised the third joint logistics node (JLN) in Mumbai.

Must read:

Explained: How to unify defence resources

Joint Logistics Node (JLN)

  • The Joint Operations Division (JOD) under the Headquarters Integrated Defence Staff pursued and enabled the establishment of the JLNs.
  • JLNs provide integrated logistics cover to the armed forces for their small arms ammunition, rations, fuel, general stores, civil hired transport, aviation clothing, spares and also engineering support to synergise their operational efforts.
  • The initiative would accrue advantages in terms of saving of manpower, economize utilization of resources, besides financial savings.
  • It is a very important first step in the direction of logistics integration of our three Services.
  • The government has operationalised the establishment of the JLNs in Mumbai, Guwahati and Port Blair.

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Nuclear Energy

Baikal Gigaton Volume Detector

Note4Students

From UPSC perspective, the following things are important :

Prelims level: GVD

Mains level: Paper 3- Baikal Gigaton Volume detector

Russian scientists have launched one of the world’s biggest underwater neutrino telescopes called the Baikal-GVD (Gigaton Volume Detector) in the waters of Lake Baikail, the world’s deepest lake situated in Siberia.

Try this PYQ from CSP 2020:

Q. The experiment will employ a trio of spacecraft flying in formation in the shape of equilateral triangle that has sides one million km long, with lasers shining between the craft.” the experiment in the question refers to?
(a) Voyager-2
(b) New horizons
(c) LISA pathfinder
(d) Evolved LISA

Baikal GVD

  • The Baikal-GVD is one of the three largest neutrino detectors in the world along with the IceCube at the South Pole and ANTARES in the Mediterranean Sea.
  • The construction of this telescope, which started in 2016, is motivated by the mission to study in detail the elusive fundamental particles called neutrinos and to possibly determine their sources.
  • It will help understanding the origins of the universe since some neutrinos were formed during the Big Bang while others continue to be formed as a result of supernova explosions or because of nuclear reactions in the Sun.
  • An underwater telescope such as the GVD is designed to detect high-energy neutrinos that may have come from the Earth’s core, or could have been produced during nuclear reactions in the Sun.

What are fundamental particles?

  • So far, the understanding is that the universe is made of some fundamental particles that are indivisible.
  • Broadly, particles of matter that scientists know about as of now can be classified into quarks and leptons.
  • Explorations has led to the discovery of over 12 such quarks and leptons, but three of these (protons, neutrons and electrons) is what everything in the world is made up of.
  • Protons (carry a positive charge) and neutrons (no charge) are types of quarks, whereas electrons (carry a negative charge) are types of leptons.
  • These three particles make what is referred to as the building block of life– the atom.

Why do scientists study fundamental particles?

  • Studying what humans and everything around them is made up of gives scientists a window into understanding the universe a better way.
  • This is one reason why scientists are so keen on studying neutrinos (not the same as neutrons), which are also a type of fundamental particle.
  • Fundamental means that neutrinos, like electrons, protons and neutrons cannot be broken down further into smaller particles.

So where do neutrinos fit in?

  • What makes neutrinos especially interesting is that they are abundant in nature, with about a thousand trillion of them passing through a human body every second.
  • In fact, they are the second most abundant particles, after photons, which are particles of light.
  • But while neutrinos are abundant, they are not easy to catch, this is because they do not carry a charge, as a result of which they do not interact with matter.
  • One way of detecting neutrinos is in water or ice, where neutrinos leave a flash of light or a line of bubbles when they interact.
  • To capture these signs, scientists have to build large detectors.

Back2Basics: Lake Baikal

  • Lake Baikal is a rift lake located in southern Siberia, Russia, between Irkutsk Oblast to the northwest and the Buryat Republic to the southeast.
  • It is the largest freshwater lake by volume in the world, containing 22 to 23% of the world’s fresh surface water.
  • With a maximum depth of 1,642 m it is the world’s deepest lake.
  • It is among the world’s clearest lakes and is the world’s oldest lake, at 25–30 million years. It is the seventh-largest lake in the world by surface area.
  • Lake Baikal formed as an ancient rift valley and has a long, crescent shape, with a surface area of 31,722 km2 (12,248 sq mi), slightly larger than Belgium.
  • The region to the east of Lake Baikal is referred to as Transbaikalia or as the Transbaikal and the loosely defined region around the lake itself is sometimes known as Baikalia.
  • UNESCO declared Lake Baikal a World Heritage Site in 1996.

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Contention over South China Sea

Places in news: Whitsun Reef

Note4Students

From UPSC perspective, the following things are important :

Prelims level: Whitsun Reef

Mains level: South China Sea Row

China’s aggressive expansion in the South China Sea has found a new ground, Whitsun Reef, where 220 Chinese vessels are currently anchored under the Philippines’ Exclusive Economic Zones (EEZ).

Once again, the South China Sea finds itself closer to becoming a security flashpoint amidst rising concerns over a military conflict.

Also, try this:

Q.Recently, Senkaku Island was in the news. Where is it located?

a) South China Sea

b) Indian Ocean

c) East China sea

d) Red sea

Whitsun Reef

  • Whitsun Reef is a reef at the northeast extreme limit of the Union Banks in the Spratly Islands of the West Philippine Sea.
  • It is the largest reef of the Union Banks.
  • The reef is V-shaped with an area of about 10 sq. km.
  • Until at least the 1990s it was submerged most of the time and was visible above the water only during the low tide, at other times the reef could be detected due to the pattern of breaking waves.
  • At the end of the 20th-century small sand dunes had developed on the reef making a territorial claim possible (an International Court of Justice judgment in 2012 stated that “low-tide elevations cannot be appropriated”).
  • The development of the dunes could have occurred naturally, but the rumours had it that the island was being built up by Vietnam and China.

Territorial disputes

  • As of 2016, the reef was unclaimed, the reports to the contrary (Chinese control) were based on confusion.
  • However, due to the reef’s strategic importance, it was expected that the reef would be occupied “soon”.
  • On 21 March 2021, about 220 Chinese fishing ships were moored at the reef ostensibly taking shelter due to the sea conditions.

Why is the Philippines concerned?

  • The Philippines considers the reef to be a part of its exclusive economic zone and continental shelf and protested the Chinese presence.
  • Currently, Philippine military aircraft and navy are monitoring the situation daily, and China has been warned that there will be an increased military presence to conduct ‘sovereignty patrols’.
  • If China is successful with its moves, the Philippines may lose another fishing ground, similar to what happened in 2012 when China took control of Scarborough Shoal.

The larger dispute

  • China and the Philippines, along with other Southeast Asian countries, have long been part of disputes over sovereign claims over the region’s islands, reefs and seabeds.
  • A third of the world’s maritime trade travels through the South China Sea annually.
  • The seabeds here are believed to be reserves of oil and natural gas while being home to fisheries essential for the food security of millions in South Asia.
  • The majority of the disputes concern the lack of adherence to the international ‘Exclusive Economic Zones’ which stretch up to 200 nautical miles from the coast of any state.
  • China, especially, has been notorious for disregarding the law on various occasions.

What does China have to say?

  • On the present matter, the Chinese have reiterated that the vessels are mere fishing boats seeking shelter from unruly weather, though no bad weather has been reported in the area.
  • It is also unlikely that fishermen would have the financial capital to remain stationary for weeks on end.
  • Experts say through their present occupation, China might be looking to create a civilian base on the reef, an artificial island or even just control the airspace.
  • It is widely assessed that Philippines’s soft approach has further strengthened China’s ambitions in the South China Sea.

Back2Basics: South China Sea Row

  • It is a dispute over territory and sovereignty over ocean areas, and the Paracels and the Spratlys – two island chains claimed in whole or in part by a number of countries.
  • China, Vietnam, the Philippines, Taiwan, Malaysia and Brunei all have competing claims.
  • Alongside the fully-fledged islands, there are dozens of rocky outcrops, atolls, sandbanks and reefs, such as the Scarborough Shoal.
  • China claims by far the largest portion of territory – an area defined by the “nine-dash line” which stretches hundreds of miles south and east from its most southerly province of Hainan.
  • Beijing says its right to the area goes back centuries to when the Paracel and Spratly island chains were regarded as integral parts of the Chinese nation, and in 1947 it issued a map detailing its claims.
  • It showed the two island groups falling entirely within its territory. Those claims are mirrored by Taiwan.

Spat over Chinese claims

  • China has backed its expansive claims with island-building and naval patrols.
  • The US says it does not take sides in territorial disputes but has sent military ships and planes near disputed islands, calling them “freedom of navigation” operations to ensure access to key shipping and air routes.
  • Both sides have accused each other of “militarizing” the South China Sea.
  • There are fears that the area is becoming a flashpoint, with potentially serious global consequences.

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