Skip to content
GK24
GK NotesEnvironment & EcologyEco-Sensitive Zones, the Western Ghats and Coastal Regulation Zones

Eco-Sensitive Zones, Western Ghats and CRZ: Exam Notes

Notes on Eco-Sensitive Zones around protected areas, the Western Ghats and the Gadgil and Kasturirangan reports, and the four Coastal Regulation Zone categories.

By · Published · 4 min read

Eco-Sensitive Zones, Western Ghats and CRZ: Exam Notes — GK24 title card
Eco-Sensitive Zones, Western Ghats and CRZ: Exam Notes — GK24 title card

Eco-Sensitive Zones, the ecologically sensitive areas of the Western Ghats and the Coastal Regulation Zones are the three instruments India uses to decide what may be built, mined or cut near a protected forest, a fragile mountain chain or a seashore. All three are created by notification under the Environment (Protection) Act, 1986, and all three are favourite one-line questions: the parent Act, the committee that wrote the report, the number of zones and the limit measured in metres.

Eco-Sensitive Zones around protected areas

An Eco-Sensitive Zone, usually written ESZ, is a notified belt of land around a National Park or a Wildlife Sanctuary. Its job is to work as a shock absorber, a graded transition from the complete protection inside the park to the ordinary use of land outside it, so that quarries, polluting factories and resorts do not come up against the very boundary of a tiger or elephant habitat.

The power to notify an ESZ flows from Section 3(2)(v) of the Environment (Protection) Act, 1986, read with Rule 5(1) of the Environment (Protection) Rules, 1986. The idea was put on paper by the Wildlife Conservation Strategy of 2002, which asked that land up to ten kilometres around protected areas be treated as ecologically fragile. Ten kilometres is only a guiding figure: the Union Ministry of Environment, Forest and Climate Change fixes the width of every zone separately, from a few hundred metres in a crowded district to several kilometres in a forested one, first as a draft notification inviting objections and then as a final notification. Among the earliest areas protected in this fashion were Murud-Janjira in Maharashtra and the Doon Valley in Uttarakhand, both notified in 1989, followed by Mahabaleshwar-Panchgani, Matheran, Mount Abu and Pachmarhi. Each notification sets up a Monitoring Committee, normally chaired by the District Collector, and requires a Zonal Master Plan to be drawn up within two years.

What may and may not be done inside an ESZ

CategoryExamples of activity
ProhibitedCommercial mining, stone quarrying and crushing units, red-category polluting industries, major hydroelectric projects, saw mills, commercial use of firewood, discharge of untreated effluents
RegulatedFelling of trees, hotels and resorts, widening of roads, overhead electric cables, commercial extraction of groundwater, drastic change of land use
PermittedOngoing agriculture and horticulture of local people, rainwater harvesting, organic farming, adoption of green technology, use of renewable energy

The Western Ghats and the two reports

The Western Ghats stretch roughly 1,600 kilometres from the valley of the Tapi in the north to Kanyakumari in the south, through Gujarat, Maharashtra, Goa, Karnataka, Kerala and Tamil Nadu. They are geologically older than the Himalayas, they force the south-west monsoon to rise and give the west coast its heavy rain, and they are counted among the world's biodiversity hotspots for the number of species found nowhere else. Anamudi in Kerala, 2,695 metres high, is the tallest peak of the Ghats and of peninsular India; the Palghat gap is the widest break in the chain, and Thal Ghat and Bhor Ghat carry the routes out of Mumbai. UNESCO inscribed the Western Ghats on the World Heritage List in 2012 as a serial property of thirty-nine sites.

Two reports govern the debate over how much of this chain should be closed to industry. The Western Ghats Ecology Expert Panel under Madhav Gadgil, which reported in 2011, treated the whole range as an ecologically sensitive area and graded it into three zones, ESZ-1, ESZ-2 and ESZ-3, with a Western Ghats Ecology Authority to police it. States called it too strict, so a High Level Working Group under K. Kasturirangan was appointed; its 2013 report recommended that about 37 per cent of the Ghats, nearly sixty thousand square kilometres of natural landscape, be declared ecologically sensitive, with mining, quarrying, thermal power stations, red-category industries and large townships banned inside it.

Coastal Regulation Zones

The Coastal Regulation Zone notification was first issued in 1991 and was revised in 2011 and again in 2019. It covers the land between the Low Tide Line and the High Tide Line, the land up to 500 metres landward of the High Tide Line along the sea, and a belt of 100 metres or the width of the creek, whichever is less, along rivers, creeks and backwaters influenced by the tide.

ZoneWhat it covers
CRZ-IEcologically sensitive areas such as mangroves, coral reefs, salt marshes and turtle nesting grounds (I-A) and the intertidal zone (I-B)
CRZ-IIAreas that are already developed up to or close to the shoreline and fall within municipal limits
CRZ-IIIRelatively undisturbed rural areas, split into densely populated III-A and the rest, III-B
CRZ-IVThe water area from the Low Tide Line to twelve nautical miles seaward (IV-A) and tidal influenced water bodies (IV-B)

New industries, the handling of hazardous substances, land reclamation, mining of sand and rocks and the discharge of untreated waste are prohibited in the zone. Clearances are processed through the National Coastal Zone Management Authority and the State Coastal Zone Management Authorities, which also approve the Coastal Zone Management Plans that map the lines on the ground. The Andaman and Nicobar Islands and Lakshadweep are governed by a separate Island Protection Zone regime rather than by the mainland CRZ rules.

Exam Point of View

Examiners test four things here. First, the parent law: every question on the authority behind an ESZ or a CRZ notification is answered by the Environment (Protection) Act, 1986, not the Wildlife Protection Act and not the Forest Conservation Act. Second, the two Western Ghats reports: remember Gadgil with the whole range and three graded zones, and Kasturirangan with roughly 37 per cent; swapping the two names is the commonest trap. Third, the CRZ numbers: 1991 for the first notification, 500 metres landward of the High Tide Line, 100 metres along tidal creeks, twelve nautical miles seaward and four zones numbered I to IV, with CRZ-I always the ecologically sensitive one. Fourth, matching questions on activities, where mining and saw mills are prohibited while rainwater harvesting and organic farming are permitted. Physical geography of the Ghats, Anamudi and the Palghat gap, is often attached to the same set.

Important Facts

Parent lawEnvironment (Protection) Act, 1986, Section 3(2)(v) with Rule 5(1) of the 1986 Rules
ESZ guiding distanceUp to 10 km around a protected area, as suggested by the Wildlife Conservation Strategy, 2002
Early notificationsMurud-Janjira (Maharashtra) and Doon Valley (Uttarakhand), 1989
Zonal Master PlanTo be prepared within two years of the ESZ notification, under a Monitoring Committee usually chaired by the District Collector
Western Ghats lengthAbout 1,600 km across Gujarat, Maharashtra, Goa, Karnataka, Kerala and Tamil Nadu
World Heritage listing2012, as a serial property of 39 sites
Gadgil panelWestern Ghats Ecology Expert Panel, 2011: whole range sensitive, zones ESZ-1 to ESZ-3
Kasturirangan groupHigh Level Working Group, 2013: about 37 per cent of the Ghats as ecologically sensitive area
Highest peakAnamudi, 2,695 m, Kerala
Widest gapPalghat gap, between the Nilgiris and the Anaimalai hills
First CRZ notification1991, revised in 2011 and 2019
CRZ landward limit500 m from the High Tide Line along the sea; 100 m or creek width along tidal water bodies
CRZ seaward limitTwelve nautical miles from the Low Tide Line, as CRZ-IV-A
Enforcing authoritiesNational Coastal Zone Management Authority and the State Coastal Zone Management Authorities

Practice MCQs on this topic

Q1.Environment & EcologyEasy

Eco-Sensitive Zones around National Parks and Wildlife Sanctuaries are notified under which Act?

  1. A.The Wildlife (Protection) Act, 1972
  2. B.The Forest (Conservation) Act, 1980
  3. C.The Environment (Protection) Act, 1986
  4. D.The Biological Diversity Act, 2002
Show answer
Correct answer: C. The Environment (Protection) Act, 1986

Explanation

The correct answer is C, the Environment (Protection) Act, 1986. The Union Ministry of Environment, Forest and Climate Change notifies an Eco-Sensitive Zone using the power in Section 3(2)(v) of that Act, read with Rule 5(1) of the Environment (Protection) Rules, 1986, which lets the central government restrict industries and operations in an area it treats as fragile. Option A is wrong because the Wildlife (Protection) Act, 1972 creates the National Park or Sanctuary itself and governs what happens inside it, not the belt of land around it. Option B is wrong because the Forest (Conservation) Act, 1980 only controls the diversion of forest land to non-forest use and says nothing about zones around protected areas. Option D is wrong because the Biological Diversity Act, 2002 deals with access to biological resources, benefit sharing and biodiversity heritage sites, a different instrument altogether.

Q2.Environment & EcologyMedium

The Western Ghats were inscribed on the UNESCO World Heritage List in which year?

  1. A.2004
  2. B.2008
  3. C.2012
  4. D.2016
Show answer
Correct answer: C. 2012

Explanation

The correct answer is C, 2012. The Western Ghats were added to the World Heritage List in 2012 as a serial natural property, that is, a single listing made up of thirty-nine separate sites scattered through Kerala, Karnataka, Tamil Nadu and Maharashtra rather than one continuous block of land. They qualified on the criterion of outstanding natural value, the very high number of species found only there and the role of the chain in driving the south-west monsoon. Option A is wrong, though 2004 is worth remembering for the listing of the Chhatrapati Shivaji Terminus. Option B is wrong because no Indian natural site was inscribed in 2008. Option D is wrong because the natural listing of 2016 was the Khangchendzonga National Park in Sikkim, a mixed site, and candidates often confuse the two.

Q3.Environment & EcologyMedium

Which committee recommended that the whole of the Western Ghats be treated as an ecologically sensitive area and graded into three zones?

  1. A.The Kasturirangan High Level Working Group
  2. B.The Western Ghats Ecology Expert Panel under Madhav Gadgil
  3. C.The Swaminathan Commission
  4. D.The Tiwari Committee
Show answer
Correct answer: B. The Western Ghats Ecology Expert Panel under Madhav Gadgil

Explanation

The correct answer is B, the Western Ghats Ecology Expert Panel under Madhav Gadgil. Its report of 2011 held that the whole range deserved protection and divided it into three graded zones, ESZ-1, ESZ-2 and ESZ-3, with the strictest ban on mining, quarrying and large projects in ESZ-1, and proposed a Western Ghats Ecology Authority to supervise the regime. Option A is wrong because the Kasturirangan group was appointed afterwards, in response to objections from the states, and narrowed the protected share to about 37 per cent of the Ghats. Option C is wrong because the Swaminathan Commission reported on the problems of farmers, not on the Ghats. Option D is wrong because the Tiwari Committee is remembered for recommending the machinery that became the Department of Environment, not for the Western Ghats.

Q4.Environment & EcologyMedium

The Kasturirangan High Level Working Group recommended that roughly what share of the Western Ghats be declared an ecologically sensitive area?

  1. A.About 10 per cent
  2. B.About 25 per cent
  3. C.About 37 per cent
  4. D.The entire range
Show answer
Correct answer: C. About 37 per cent

Explanation

The correct answer is C, about 37 per cent. The group that K. Kasturirangan headed reported in 2013 and used satellite imagery to separate the natural landscape of the Ghats from the cultivated and built-up land. It then recommended that only the natural part, close to sixty thousand square kilometres and roughly 37 per cent of the whole chain, be declared ecologically sensitive, with mining, quarrying, thermal power stations, red-category industries and large townships prohibited inside it. Option A and option B are wrong because they understate the recommended area and match no report on the Ghats. Option D is wrong because treating the entire range as sensitive was the Gadgil panel's position of 2011, and it was precisely the objection of the states to that position which led to the appointment of the Kasturirangan group.

Q5.Environment & EcologyEasy

Along the open sea coast, the Coastal Regulation Zone extends how far landward of the High Tide Line?

  1. A.100 metres
  2. B.200 metres
  3. C.500 metres
  4. D.1,000 metres
Show answer
Correct answer: C. 500 metres

Explanation

The correct answer is C, 500 metres. The Coastal Regulation Zone notification fixes the landward limit of the regulated belt at 500 metres from the High Tide Line along the sea, and that figure has stayed the same through the notifications of 1991, 2011 and 2019. Option A is wrong, but it is the figure to remember for a different line: along rivers, creeks and backwaters influenced by the tide the zone is 100 metres or the width of the water body, whichever is less. Option B is wrong, although 200 metres was the No Development Zone fixed for rural CRZ-III areas, which the 2019 notification reduced to 50 metres for densely populated rural stretches. Option D is wrong because no CRZ notification has used a landward limit of one kilometre. Separating the 500 metre zone from the 100 metre creek belt is the usual trap.

Q6.Environment & EcologyEasy

Mangroves, coral reefs and turtle nesting grounds fall under which Coastal Regulation Zone category?

  1. A.CRZ-I
  2. B.CRZ-II
  3. C.CRZ-III
  4. D.CRZ-IV
Show answer
Correct answer: A. CRZ-I

Explanation

The correct answer is A, CRZ-I. This category holds the ecologically sensitive stretches of the coast, and the notification lists mangroves, coral reefs and coral areas, sand dunes, salt marshes, mudflats, biologically active areas and the nesting grounds of turtles and birds in its sub-category CRZ-I-A, where construction is effectively barred. The intertidal belt between the Low Tide Line and the High Tide Line is CRZ-I-B. Option B is wrong because CRZ-II covers coastal areas that are already developed up to or close to the shoreline and lie inside municipal limits. Option C is wrong because CRZ-III covers relatively undisturbed rural areas, which are split into the densely populated III-A and the rest, III-B. Option D is wrong because CRZ-IV is the water area itself, from the Low Tide Line out to twelve nautical miles.

Q7.Environment & EcologyEasy

Which of the following is a permitted activity inside a notified Eco-Sensitive Zone?

  1. A.Commercial stone quarrying
  2. B.Setting up a saw mill
  3. C.Rainwater harvesting and organic farming
  4. D.A red-category polluting industry
Show answer
Correct answer: C. Rainwater harvesting and organic farming

Explanation

The correct answer is C, rainwater harvesting and organic farming. Eco-Sensitive Zone notifications sort activities into three lists, and the permitted list encourages exactly these practices along with the agriculture and horticulture that local people already carry on, the use of renewable energy and the adoption of green technology, because the purpose of the zone is to limit damaging industry, not to end village life. Option A is wrong because commercial mining, stone quarrying and stone crushing units are in the prohibited list, as the Supreme Court has repeatedly held for areas around protected forests. Option B is wrong because saw mills and the commercial use of firewood are also prohibited. Option D is wrong because red-category industries, the most polluting class in the pollution control board's own grading, are barred from such zones.

Q8.Environment & EcologyMedium

Anamudi, the highest peak of the Western Ghats, lies in which state?

  1. A.Karnataka
  2. B.Tamil Nadu
  3. C.Kerala
  4. D.Maharashtra
Show answer
Correct answer: C. Kerala

Explanation

The correct answer is C, Kerala. Anamudi rises to 2,695 metres in the Anaimalai or Elephant hills of Idukki district in Kerala and is the highest point not only of the Western Ghats but of the whole of peninsular India, higher than anything south of the Himalayas. It stands inside the Eravikulam National Park, known for the Nilgiri tahr. Option A is wrong because the tallest peak of the Ghats in Karnataka is Mullayanagiri, near Chikmagalur, far lower than Anamudi. Option B is wrong because the best known Tamil Nadu summit in the chain is Doddabetta in the Nilgiris at about 2,637 metres, the figure examiners put beside Anamudi to confuse candidates. Option D is wrong because Kalsubai, the highest point in Maharashtra, reaches only about 1,646 metres.

Q9.Environment & EcologyMedium

The Coastal Regulation Zone notification was issued for the first time in which year?

  1. A.1986
  2. B.1991
  3. C.2011
  4. D.2019
Show answer
Correct answer: B. 1991

Explanation

The correct answer is B, 1991. The first Coastal Regulation Zone notification was issued in February 1991 under the Environment (Protection) Act, declaring the coastal stretches and the waters influenced by the tide as a regulated zone and classifying them for the first time. Option A is wrong because 1986 is the year of the parent Act, the Environment (Protection) Act, under which the notification was later issued, and mixing up the Act with the notification is the standard mistake here. Option C is wrong because 2011 was the first comprehensive revision, which brought in the hazard line and separate rules for Kerala backwaters and Goa, and Option D is wrong because 2019 is the current notification, which split CRZ-III into the densely populated III-A with a fifty metre No Development Zone and the rest as III-B.

Q10.Environment & EcologyHard

The suggestion that land up to ten kilometres around a protected area be treated as ecologically fragile came from which document?

  1. A.The National Forest Policy, 1988
  2. B.The Wildlife Conservation Strategy, 2002
  3. C.The National Water Policy, 2012
  4. D.The Coastal Regulation Zone Notification, 2011
Show answer
Correct answer: B. The Wildlife Conservation Strategy, 2002

Explanation

The correct answer is B, the Wildlife Conservation Strategy, 2002. That strategy asked that land falling within ten kilometres of the boundaries of National Parks and Wildlife Sanctuaries be notified as ecologically fragile, and the National Wildlife Action Plan carried the same thought forward, which is how the ten kilometre figure entered the discussion on Eco-Sensitive Zones. In practice the width is decided case by case and may be far less than ten kilometres. Option A is wrong because the National Forest Policy of 1988 is remembered for the goal of one third of the land area under forest cover and for putting conservation before revenue. Option C is wrong because the National Water Policy concerns the pricing and sharing of water. Option D is wrong because the CRZ notification deals with the coast, not with buffers around protected areas.

Q11.Environment & EcologyHard

Which authority, along with the State Coastal Zone Management Authorities, oversees the enforcement of the Coastal Regulation Zone rules?

  1. A.The Central Pollution Control Board
  2. B.The National Coastal Zone Management Authority
  3. C.The National Green Tribunal
  4. D.The Survey of India
Show answer
Correct answer: B. The National Coastal Zone Management Authority

Explanation

The correct answer is B, the National Coastal Zone Management Authority. It was constituted under the Environment (Protection) Act to advise the central government on coastal matters and to work with the State and Union Territory Coastal Zone Management Authorities, which examine proposals and prepare the Coastal Zone Management Plans that draw the High Tide Line and the zone boundaries on the map. Option A is wrong because the Central Pollution Control Board works on effluent and emission standards under the Water and Air Acts and grades industries into categories, but does not administer the CRZ. Option C is wrong because the National Green Tribunal decides disputes and appeals on environmental law, including CRZ violations, after the fact, instead of running the clearance system. Option D is wrong because the Survey of India maps the country and does not grant coastal clearances.

Q12.Environment & EcologyHard

The Palghat gap, the widest break in the Western Ghats, separates which two hill groups?

  1. A.The Nilgiris and the Anaimalai hills
  2. B.The Cardamom hills and the Agasthyamalai hills
  3. C.The Sahyadri and the Nilgiris
  4. D.The Baba Budan hills and the Brahmagiri hills
Show answer
Correct answer: A. The Nilgiris and the Anaimalai hills

Explanation

The correct answer is A, the Nilgiris and the Anaimalai hills. The Palghat gap, about thirty kilometres wide in Palakkad district of Kerala, is the broadest break in the whole chain and carries the road and the railway line that join Coimbatore in Tamil Nadu to Palakkad and Thrissur in Kerala. Because the Ghats fall away there, the gap also lets the south-west monsoon push inland and influences the rainfall of the Coimbatore plateau. Option B is wrong because the narrower Shencottah gap, not the Palghat gap, lies between the Cardamom hills and the Agasthyamalai group in the far south. Option C is wrong because Sahyadri is simply another name for the northern Western Ghats and no major gap separates it from the Nilgiris. Option D is wrong because both these ranges are in Karnataka, well north of the gap.

Frequently Asked Questions

Under which Act are Eco-Sensitive Zones declared in India?

Under the Environment (Protection) Act, 1986. The Union Ministry of Environment, Forest and Climate Change issues the notification using Section 3(2)(v) of the Act with Rule 5(1) of the Environment (Protection) Rules, 1986. The Wildlife (Protection) Act, 1972 creates the National Park or Sanctuary itself, but the belt around it is an ESZ under the 1986 Act.

What is the difference between the Gadgil and Kasturirangan reports?

The Gadgil panel of 2011 treated the entire Western Ghats as an ecologically sensitive area and divided it into three graded zones with a Western Ghats Ecology Authority to enforce them. The Kasturirangan group of 2013 narrowed this to roughly 37 per cent of the Ghats, about sixty thousand square kilometres of natural landscape, and left the cultivated and settled parts out of the restriction.

How far from the sea does the Coastal Regulation Zone extend?

On the landward side it runs 500 metres from the High Tide Line along the open sea, and along rivers, creeks and backwaters influenced by the tide it runs 100 metres or the width of the creek, whichever is less. On the seaward side CRZ-IV covers the water from the Low Tide Line out to twelve nautical miles.

Which Coastal Regulation Zone category includes mangroves and coral reefs?

CRZ-I, the ecologically sensitive category. Mangroves, coral reefs, salt marshes, sand dunes and turtle nesting grounds fall in CRZ-I-A, where construction is barred, while the area between the Low Tide Line and the High Tide Line is CRZ-I-B.

Is farming allowed inside an Eco-Sensitive Zone?

Yes. The agriculture and horticulture that local people already practise continue, and rainwater harvesting, organic farming, renewable energy and other green practices are encouraged. What the notification stops is commercial mining, stone quarrying, polluting red-category industry, saw mills, major hydel projects and the discharge of untreated effluent.

Why are the Western Ghats called a biodiversity hotspot?

Because they hold a very large number of plants, amphibians, reptiles and fish found nowhere else on earth, and because much of their original forest has already been lost to plantations, mining and settlement. High endemism together with heavy loss of habitat is exactly what the term hotspot means.

Sources

  • The Environment (Protection) Act, 1986 — Ministry of Environment, Forest and Climate Change
  • Coastal Regulation Zone Notification, 2019 — Ministry of Environment, Forest and Climate Change
  • Western Ghats, World Heritage List — UNESCO World Heritage Centre
  • Report of the Western Ghats Ecology Expert Panel, 2011 — Ministry of Environment and Forests
View all