UPSC Mains 2016 Geography Optional Question Papers with Model Answers

All 55 questions of the 2016 Civil Services Main Examination, Geography Paper I and Geography Paper II, with marks and a suggested time per part. Solve each part on paper first, then open the model answer, or send it to answer-writing practice for evaluation.

UPSC Mains 2016 Geography Paper I

Question 1 (50 marks)

Q1(a) · Geomorphic Processes and Landscape Development · 10 marks≈ 7 min
Geomorphic Cycles and Landscape Development (Davis, Penck, King)
Describe the "Basket of eggs topography".
हिंदी में प्रश्न
"अण्डे की टोकरी स्थलाकृति" का वर्णन कीजिए।
Practise this question Geomorphic Processes and Landscape Development notes
Model answer
Paper and question: Paper I, Q1(a)
Approach: Define the term as drumlin-field topography, describe drumlin shape, composition and orientation, the debated modes of origin and examples, with a sketch of a drumlin swarm.
Basket of eggs topography is the landscape of a glaciated lowland covered by a swarm of drumlins, which from above look like eggs lying half-buried in a basket.
A drumlin is a smooth, oval or elongated hill made mainly of glacial till, shaped under moving ice. Its long axis lies parallel to the direction of ice flow; the blunt, steeper stoss end faces up-ice and the tapering, gentler lee end points down-ice. Drumlins are commonly a few to some tens of metres high and often occur in hundreds.
Origin is debated: deposition and moulding of till by lodgement beneath the ice; deformation of soft subglacial sediment around obstacles and J. Shaw’s contested idea of sculpting by subglacial meltwater floods.
Examples: Clew Bay in western Ireland (partly drowned drumlins), the Eden Valley in England, and the drumlin field of western New York and Wisconsin in the USA.
Diagram: Plan view of a drumlin swarm with ice-flow arrow, and a long profile showing steep stoss end and gentle lee tail.
Significance: drumlin orientation is used to reconstruct the flow direction of Pleistocene ice sheets, and the hollows between them hold small lakes and bogs.
Q1(b) · Climatology: Atmosphere and Circulation · 10 marks≈ 7 min
Heat Budget, Temperature and Pressure Belts
Differentiate between insolation and temperature and explain anomalous temperature.
हिंदी में प्रश्न
सूर्यातपन और ताप के बीच विभेदन कीजिए और असंगत ताप को स्पष्ट कीजिए।
Practise this question Climatology: Atmosphere and Circulation notes
Model answer
Paper and question: Paper I, Q1(b)
Approach: Distinguish the two terms point by point (cause and effect, nature, measurement, distribution), then define anomalous temperature with positive and negative examples. Sketch a world map of January isanomals.
Insolation is the incoming short-wave solar radiation received at the earth's surface, while temperature is the degree of hotness of a body or of the air.
Differences: (i) insolation is the cause, temperature the effect; (ii) insolation is measured in watts per square metre, temperature in °C; (iii) insolation depends on sun angle, day length and atmospheric transparency, while temperature also depends on altitude, distance from the sea, ocean currents and winds; (iv) maximum temperature lags behind maximum insolation, both daily (about 2 p.m.) and seasonally (July rather than June over northern continents).
Anomalous temperature: the difference between the mean temperature of a place and the mean temperature of its latitude. Lines joining places of equal anomaly are called isanomals.
Map: World outline showing January isanomals, with a positive anomaly over the Norwegian coast and North Atlantic and a negative anomaly centred over north-east Siberia.
A positive anomaly occurs where a place is warmer than its latitude average, as along the Norwegian coast in January, warmed by the North Atlantic Drift. A negative anomaly occurs where it is colder, as in north-east Siberia around Verkhoyansk in winter.
Anomalies thus reveal the non-latitudinal controls of temperature.
Q1(c) · Oceanography · 10 marks≈ 7 min
Law of the Sea and Marine Pollution
Discuss Maritime Zones.
हिंदी में प्रश्न
समुद्री कटिबंधों (मैरीटाइम ज़ोन) की विवेचना कीजिए।
Practise this question Oceanography notes
Model answer
Paper and question: Paper I, Q1(c)
Approach: Explain the maritime zones defined by UNCLOS (1982) from the baseline outward, with the rights of the coastal state in each and India's position; draw a cross-section of the zones from the baseline to the high seas.
Maritime zones are belts of sea measured from the baseline (usually the low-water line), in which coastal states hold defined rights under UNCLOS (1982); India applies them through its Maritime Zones Act, 1976.
Internal waters: landward of the baseline (ports, bays); full sovereignty.
Territorial sea: up to 12 nautical miles; full sovereignty over water, seabed and airspace, subject to innocent passage of foreign ships.
Contiguous zone: up to 24 nautical miles; the state may enforce customs, fiscal, immigration and sanitary laws.
Exclusive Economic Zone: up to 200 nautical miles; sovereign rights over living and non-living resources, while others keep freedom of navigation. India's EEZ is about 2.02 million km².
Continental shelf: rights over the seabed to 200 nautical miles, or to the edge of the continental margin up to 350 nautical miles.
High seas and the Area: beyond national jurisdiction; open to all, with seabed minerals managed by the International Seabed Authority as common heritage of mankind.
Diagram: Cross-section from the coast showing baseline, internal waters, 12, 24 and 200 nautical mile limits, continental shelf and high seas.
These zones balance coastal control with global freedom of the seas.
Q1(d) · Biogeography · 10 marks≈ 7 min
World Distribution of Plants and Animals; Gene Pool Centres
Bring out the ecological significance of Tropical Rainforest Biome.
हिंदी में प्रश्न
उष्णकटिबंधीय वर्षावन जीवोम (बायोम) के पारिस्थितिकीय महत्त्व को उजागर कीजिए।
Practise this question Biogeography notes
Model answer
Paper and question: Paper I, Q1(d)
Approach: Locate the biome, then bring out its ecological significance (biodiversity, carbon, water cycle, nutrient cycling, genetic resources) with examples; draw a world map of tropical rainforests.
The tropical rainforest biome lies roughly within 10° of the equator where rain exceeds about 200 cm and temperatures stay near 27 °C all year: the Amazon, Congo basin and South-east Asia, and in India the Western Ghats, north-east and Andaman and Nicobar Islands.
Biodiversity: though it covers a small share of land, it is commonly estimated to hold over half of terrestrial species, in layered canopies with epiphytes and climbers.
Climate and water: it stores vast carbon in biomass and recycles rainfall through transpiration; Amazon moisture feeds rain far to the south.
Nutrient cycling: nutrients lie mostly in living biomass and recycle rapidly, so soils are poor once forest is cleared.
Map: World map shading the Amazon, Congo, South-east Asian and north-east Australian rainforests, with India’s Western Ghats and north-east.
It is also a store of genes and medicines, such as vincristine from the rosy periwinkle of Madagascar, and home to indigenous peoples. Its loss would weaken global climate and life support.
Q1(e) · Environmental Geography · 10 marks≈ 7 min
Environmental Hazards, Policy, Education and Legislation
Explain the hydro-meteorological hazards in the Himalayas.
हिंदी में प्रश्न
हिमालय में जल-मौसमविज्ञानी (हाइड्रो-मिटिरियोलॉजिकल) ख़तरों को स्पष्ट कीजिए।
Practise this question Environmental Geography notes
Model answer
Paper and question: Paper I, Q1(e)
Approach: Define hydro-meteorological hazards and why the Himalaya is prone to them, then explain each type (cloudbursts and flash floods, rain-triggered landslides, snow and ice hazards, others) with examples and end with responses; mark the cited events on a map of the Himalaya.
Hydro-meteorological hazards are caused by atmospheric and hydrological processes. In the Himalaya they are intensified by steep slopes, young fragile rocks, orographic lifting of monsoon air and the meeting of monsoon currents with western disturbances.
Cloudbursts and flash floods: very intense local rainfall, as at Leh in August 2010. The Kedarnath disaster of June 2013 followed extreme rain when a western disturbance interacted with the early monsoon.
Rain-triggered landslides and debris flows: Himachal Pradesh suffered widespread landslides and floods in the 2023 monsoon, while road cutting and hydro projects add to slope instability.
Snow and ice hazards: avalanches and snowstorms in Kashmir and Himachal, and glacial lake outburst floods such as South Lhonak in Sikkim (2023). Others: cold waves, hailstorms and drought in the cold desert of Ladakh.
Map: Outline map of the Indian Himalaya marking Leh, Kedarnath, the Beas valley in Himachal Pradesh, South Lhonak lake and the paths of western disturbances and the monsoon current.
Warming is raising the frequency of extreme rain and glacier melt. Doppler radars, early warning, slope stabilisation and hazard zoning are the key responses.

Question 2 (50 marks)

Q2(a) · Geomorphic Processes and Landscape Development · 20 marks≈ 14 min
Geomorphic Cycles and Landscape Development (Davis, Penck, King)
"In explaining the concept of 'Pediplanation', King combined the ideas of Davis, Penck and Wood with his own." Elaborate.
हिंदी में प्रश्न
"'पेडिप्लेनेशन' की संकल्पना की व्याख्या करने में किंग ने डेविस, पेन्क और वुड के विचारों के साथ अपने विचार जोड़े थे।" सविस्तार समझाइए।
Practise this question Geomorphic Processes and Landscape Development notes
Model answer
Paper and question: Paper I, Q2(a)
Approach: Introduce King’s pediplanation, then show what he took from Davis (cycle, base level, end surface), Penck (parallel retreat) and Wood (four slope elements), what he added himself (pediments, inselbergs, global cyclic surfaces), and critique; draw the four-element slope and pediplain sequence.
L.C. King, working in southern Africa, developed the concept of pediplanation (Canons of Landscape Evolution, 1953; Morphology of the Earth, 1962): landscapes are reduced not by downwearing to a peneplain but by the parallel retreat of scarps, leaving a pediplain of coalescing pediments.
From Davis: King kept the cyclic idea — uplift, followed by youth, maturity and old age — the control of base level, and the notion of an ultimate end surface. Each new uplift starts a new cycle, which spreads inland as a knickpoint migrates headward from the coast.
From Penck: King adopted the idea that slopes retreat parallel to themselves at constant angle instead of declining, so that steep scarps persist even in late stages, while the gentle lower slope extends.
From A. Wood (1942): King took Wood’s four slope elements — the convex waxing slope, the free face, the debris (constant) slope and the concave waning slope — and called this the standard hillslope. The waning slope becomes the pediment.
King’s own contributions: (i) pediments are cut by sheetwash and rillwash as the scarp retreats; (ii) pediments coalesce into a pediplain dotted with inselbergs and bornhardts; (iii) the semi-arid scarp-retreat model, not Davis’s humid model, is the ‘normal’ mode of landscape development worldwide; (iv) global cyclic surfaces such as the Gondwana, post-Gondwana and African surfaces can be correlated across continents.
Diagram: Wood–King four-element hillslope, and three stages showing a scarp retreating parallel, the pediment widening and a final pediplain with inselbergs.
In India, pediments and inselbergs mark the Aravalli flanks and the Bundelkhand and Chotanagpur uplands.
Critique: King underplayed climatic variation and deep chemical weathering (Büdel’s etchplain); parallel retreat is not universal; and his worldwide correlation of surfaces is debated and hard to date. Yet his synthesis made slope evolution, not just stage, central to cyclic geomorphology.
Q2(b) · Climatology: Weather Systems, Climates and Climate Change · 15 marks≈ 11 min
Tropical and Temperate Cyclones
Compare the origin and weather conditions associated with the tropical and temperate cyclones.
हिंदी में प्रश्न
उष्णकटिबंधीय और शीतोष्ण कटिबंधीय चक्रवातों से जुड़ी उत्पत्ति और मौसमी दशाओं की तुलना कीजिए।
Practise this question Climatology: Weather Systems, Climates and Climate Change notes
Model answer
Paper and question: Paper I, Q2(b)
Approach: Compare tropical and temperate cyclones point by point: origin (energy source, latitude, fronts, conditions), structure, movement and associated weather, with named examples, ending with key contrasts; draw plan views of both.
Both are low-pressure systems with converging, rotating winds, but they differ in origin and weather.
Origin of tropical cyclones: they form over warm oceans with surface temperatures above about 26–27°C, between about 5° and 20° latitude where the Coriolis force is enough, with low vertical wind shear and a pre-existing disturbance. Their energy is latent heat of condensation; they have no fronts. Examples: Cyclone Amphan (2020), Hurricane Katrina (2005).
Origin of temperate cyclones: they form between about 35° and 65° latitude along the polar front where cold and warm air masses meet (Bjerknes' theory). Their energy comes from the temperature contrast between air masses and is guided by the jet stream. Example: Western Disturbances reaching north India.
Weather of tropical cyclones: a calm eye ringed by the eye wall with the strongest winds and torrential rain, spiral rain bands and storm surge at landfall. They are compact, move east to west with the trades and weaken quickly over land.
Weather of temperate cyclones: a sequence as fronts pass, steady rain ahead of the warm front, a mild warm sector, then heavy showers and a sharp temperature fall at the cold front. They are large (often over 1,000 km), move west to east with the westerlies and occur over land and sea.
Diagram: Plan views of a tropical cyclone with eye and spiral bands, and a temperate cyclone with warm front, cold front and warm sector.
Thus tropical cyclones are violent, compact and seasonal, while temperate cyclones are milder, larger and frequent.
Q2(c) · Climatology: Weather Systems, Climates and Climate Change · 15 marks≈ 11 min
Global Climate Change, Applied and Urban Climatology
Give a reasoned account on how the impact of Global Warming differs from one part of the Earth to the other.
हिंदी में प्रश्न
एक तर्कसंगत विवरण प्रस्तुत कीजिए कि वैश्विक तापन के प्रभाव की पृथ्वी के एक भाग से दूसरे भाग के बीच भिन्नता किस प्रकार होती है।
Practise this question Climatology: Weather Systems, Climates and Climate Change notes
Model answer
Paper and question: Paper I, Q2(c)
Approach: Give a reasoned account of why global warming's impact varies across the earth: differential warming (Arctic amplification, land versus ocean) and differential effects on regions (polar, mountain, coastal and island, tropical dryland, monsoon, mid-latitude), plus differences in vulnerability; add a world map.
Global warming is a global average; its impacts differ because warming itself is uneven and because regions differ in exposure and capacity to cope.
Uneven warming: (i) Arctic amplification: the Arctic is warming at least twice as fast as the global average (IPCC AR6), as melting ice exposes dark ocean that absorbs more sunlight; (ii) land warms faster than oceans, which store heat; (iii) continental interiors and high mountains warm faster than coasts.
Polar and mountain regions: sea-ice loss, permafrost thaw releasing methane, and retreat of Himalayan and Andean glaciers threaten water supplies for millions downstream.
Coasts and islands: sea-level rise and storm surge endanger low-lying deltas (Ganga–Brahmaputra, Nile, Mekong) and small island states such as the Maldives, Kiribati and Tuvalu.
Tropics and drylands: already near heat limits, they face lower crop yields, heat stress and longer droughts, as in the Sahel; monsoon Asia faces erratic rainfall and more extreme downpours.
Mid and high latitudes: some areas such as Canada and Russia may gain longer growing seasons, though with more heat waves, wildfires and pests; the Mediterranean is drying.
Map: World map showing Arctic amplification, glacier zones, vulnerable deltas and islands, drying regions and possible agricultural gainers.
Vulnerability also differs: poorer countries with less adaptive capacity suffer more though they emitted least, which underpins the principle of common but differentiated responsibilities.

Question 3 (50 marks)

Q3(a) · Climatology: Weather Systems, Climates and Climate Change · 20 marks≈ 14 min
Global Climate Change, Applied and Urban Climatology
Discuss the significance of World Climate Research Programme (WCRP) and its core projects in the understanding of climatic change.
हिंदी में प्रश्न
जलवायु परिवर्तन को समझने में विश्व जलवायु अनुसन्धान कार्यक्रम (डब्ल्यू.सी.आर.पी.) के महत्त्व और उसकी क्रोड परियोजनाओं पर चर्चा कीजिए।
Practise this question Climatology: Weather Systems, Climates and Climate Change notes
Model answer
Paper and question: Paper I, Q3(a)
Approach: Discuss the WCRP: its origin, sponsors and objectives, its core projects past and present (TOGA, WOCE, GEWEX, CLIVAR, SPARC/APARC, CliC) and coordinated modelling (CMIP, CORDEX), and how each improved understanding of climate change, with Indian links; add an organisational diagram.
The World Climate Research Programme (WCRP), established in 1980, is sponsored by the World Meteorological Organization and the International Science Council (formerly ICSU), joined in 1993 by UNESCO's Intergovernmental Oceanographic Commission. Its aims are to determine how far climate can be predicted and how far humans influence it.
Significance: it coordinates research across nations and disciplines, organises global observation campaigns and model comparisons, and provides much of the science assessed by the IPCC.
Core projects: (i) TOGA (Tropical Ocean–Global Atmosphere, 1985–94) studied the tropical Pacific and laid the basis for El Niño forecasting through the moored buoy array; (ii) WOCE (World Ocean Circulation Experiment) mapped global ocean circulation and heat transport in the 1990s; (iii) CLIVAR (Climate and Ocean: Variability, Predictability and Change) studies ocean–atmosphere variability such as ENSO, the Indian Ocean Dipole and the monsoons.
(iv) GEWEX (Global Energy and Water Exchanges) studies the energy and water cycle, clouds and land–atmosphere interaction; (v) SPARC, now APARC, studies the stratosphere and ozone and their role in climate; (vi) CliC (Climate and Cryosphere) studies ice sheets, glaciers, sea ice and permafrost and their contribution to sea-level rise.
Modelling: WCRP's Coupled Model Intercomparison Project (CMIP) supplies the climate projections used in IPCC reports, and CORDEX produces regional downscaled projections; its South Asia component is coordinated by the Indian Institute of Tropical Meteorology, Pune.
Diagram: Organisational chart with WCRP at the top, sponsors (WMO, ISC, IOC-UNESCO) above, and core projects and modelling activities below, linked to the IPCC.
Thus WCRP has turned scattered observations into a coordinated understanding of how the climate system works and changes, improving seasonal monsoon and El Niño forecasts and long-term projections on which policies such as the Paris Agreement rest.
Q3(b) · Oceanography · 15 marks≈ 11 min
Waves, Currents and Tides
"The relationship between the winds and the currents is best seen in the Indian Ocean." Justify.
हिंदी में प्रश्न
"पवनों और धाराओं के बीच का संबंध सबसे अच्छी तरह से हिन्द महासागर में देखा जाता है।" सिद्ध कीजिए।
Practise this question Oceanography notes
Model answer
Paper and question: Paper I, Q3(b)
Approach: Justify the statement by contrasting the permanent southern gyre with the monsoon-driven reversal of currents in the north Indian Ocean in winter and summer, naming the currents; draw two seasonal sketch maps.
Surface currents are driven chiefly by winds, but in most oceans the wind belts are steady, so the link is hidden. The north Indian Ocean, closed by Asia and lying in the monsoon realm, is unique: its currents reverse seasonally with the monsoon winds.
Southern Indian Ocean: as in other oceans, a permanent anticlockwise gyre exists: the South Equatorial Current flows west under the south-east trades, the warm Mozambique and Agulhas currents flow south along Africa, the West Wind Drift flows east, and the cold West Australian Current returns north.
Winter (north-east monsoon): winds blow from land to sea, driving the North-East Monsoon Current westward; the circulation in the Arabian Sea and Bay of Bengal becomes anticlockwise, and an Equatorial Counter Current flows east south of the equator.
Summer (south-west monsoon): the winds reverse and the South-West Monsoon Current flows eastward; the circulation turns clockwise. The Somali Current flows strongly north, with intense upwelling, and the coastal currents of India also reverse.
Diagram: Two sketch maps of the north Indian Ocean: January with the westward North-East Monsoon Current, and July with the eastward South-West Monsoon Current and northward Somali Current.
Since the currents change direction within months of the winds, the Indian Ocean offers the clearest proof that wind drives surface circulation, justifying the statement.
Q3(c) · Environmental Geography · 15 marks≈ 11 min
Ecosystems, Ecological Imbalances and Environmental Degradation
Write a critical note on the tendency of "use and throw" in the context of economic status and environment.
हिंदी में प्रश्न
आर्थिक प्रस्थिति और पर्यावरण के सन्दर्भ में, "उपयोग करो और फेंक दो" की प्रवृत्ति पर समालोचनात्मक टिप्पणी लिखिए।
Practise this question Environmental Geography notes
Model answer
Paper and question: Paper I, Q3(c)
Approach: Explain the use-and-throw culture and its links with income (affluence, consumerism, planned obsolescence), assess its environmental costs with data and examples, critically note the differences between rich and poor and the counter-trends, and suggest a circular-economy way forward. A linear versus circular economy diagram helps.
The 'use and throw' tendency is the habit of buying goods for short use and discarding them rather than repairing or reusing them. It is a product of the linear economy (take, make, dispose) and rises with income, urbanisation and marketing.
Link with economic status: rising incomes increase consumption of packaged food, fast fashion and electronics; planned obsolescence and cheap disposables make replacement easier than repair. High-income societies generate far more waste per person.
Environmental costs: the world produced about 62 million tonnes of e-waste in 2022, of which less than a quarter was formally recycled (Global E-waste Monitor 2024); plastics choke drains, rivers and oceans and break into microplastics; landfills such as Ghazipur in Delhi emit methane and catch fire; extraction of raw materials degrades forests and mining regions.
Diagram: Two loops: a straight arrow extraction → production → use → landfill, and a circle of design → use → repair and reuse → recycling → back to production.
A critical view: the poor in India traditionally reuse and repair, and the informal kabadiwala network recovers much of the recyclable waste, though under unsafe conditions. Yet as the middle class grows, use-and-throw habits are spreading.
Responses: India banned identified single-use plastic items from 1 July 2022; the Plastic Waste Management Rules and E-Waste (Management) Rules, 2022, impose extended producer responsibility; Mission LiFE promotes mindful consumption.
Breaking the link between prosperity and waste requires circular design, right-to-repair, deposit-return schemes and behavioural change.

Question 4 (50 marks)

Q4(a) · Oceanography · 20 marks≈ 14 min
Marine Resources, Coral Reefs and Sea-level Change
Bring out the various ecological problems associated with the exploitation and use of oceans and their resources.
हिंदी में प्रश्न
महासागरों और उनके संसाधनों के शोषण और उपयोग से सम्बद्ध विभिन्न पारिस्थितिकीय समस्याओं को उजागर कीजिए।
Practise this question Oceanography notes
Model answer
Paper and question: Paper I, Q4(a)
Approach: Bring out the ecological problems resource by resource (fisheries, minerals and oil, coastal habitats, pollution, shipping, climate-related) with named examples and data, ending with solutions; draw a world map of hotspots of ocean degradation.
Growing human demand has turned the oceans into sources of food, fuel, minerals and transport, and also into sinks for waste, creating serious ecological problems.
Overfishing: FAO's SOFIA 2024 reports that about 38 per cent of assessed fish stocks were overfished in 2021. The collapse of the Grand Banks cod fishery in the early 1990s shows the danger. Bottom trawling destroys seabed habitats, and bycatch kills turtles, dolphins and sharks; in India, trawling has damaged grounds in the Palk Bay.
Oil and mineral extraction: offshore drilling and tanker accidents cause spills (Deepwater Horizon, 2010; MV Wakashio off Mauritius, 2020); sand and coral mining erode coasts; proposed deep-sea mining threatens fragile abyssal habitats.
Coastal habitat loss: mangroves are cleared for aquaculture ponds, ports and tourism, and coral reefs are damaged by sedimentation and blast fishing, reducing nurseries and storm protection.
Pollution: untreated sewage and fertiliser runoff create dead zones, such as in the Gulf of Mexico and the Baltic Sea; plastics accumulate in gyres like the Great Pacific Garbage Patch and enter food chains as microplastics.
Shipping and noise: ballast water spreads invasive species across oceans, ship strikes and engine noise disturb whales and dolphins, and routine discharge of oily bilge water adds chronic pollution along busy routes such as the Arabian Sea lanes.
Climate stress: burning fossil fuels warms and acidifies the oceans, causing coral bleaching and deoxygenation.
Map: World map marking overfished zones, oil spill sites, dead zones, garbage patches and bleached reefs.
Ecosystem-based fisheries management, marine protected areas (SDG 14), MARPOL, the High Seas Treaty (2023) and plastic control can restore ocean health.
Q4(b) · Geomorphic Processes and Landscape Development · 15 marks≈ 11 min
Geomorphic Cycles and Landscape Development (Davis, Penck, King)
"Geological structure has a dominant control on landforms and is reflected on them." Discuss.
हिंदी में प्रश्न
"भूवैज्ञानिक संरचना का भू-आकृतियों पर प्रभावी नियन्त्रण होता है और यह उनमें प्रतिबिम्बित भी होती है।" चर्चा कीजिए।
Practise this question Geomorphic Processes and Landscape Development notes
Model answer
Paper and question: Paper I, Q4(b)
Approach: Identify the statement as Thornbury’s second fundamental concept, show control of lithology and of structure (folds, faults, joints, domes) on landforms and drainage with Indian and world examples, and add limits; draw structural landform sketches.
The statement is the second of W.D. Thornbury’s fundamental concepts of geomorphology (Principles of Geomorphology, 1954). Geological structure includes both lithology (rock type, hardness, permeability) and attitude (dip, folds, faults, joints).
Lithology: hard rocks stand out as ridges and soft rocks are worn into vales. Limestone gives karst with caves and sinkholes, as in Meghalaya and Kotumsar (Chhattisgarh); granite weathers into tors and inselbergs; horizontal Deccan basalt flows give flat-topped mesas and stepped (trap) slopes in the Western Ghats.
Folds: anticlines and synclines produce ridge-and-valley relief, as in the Jura and Appalachians; in the Shiwaliks, longitudinal synclinal valleys form duns such as Dehradun.
Faults: horsts and grabens give block mountains and rift valleys — the Narmada and Tapi rift valleys between the Vindhya–Satpura blocks, and the East African Rift; fault scarps show triangular facets.
Drainage reflects structure: trellis on folds, rectangular on jointed rock, radial on domes such as Amarkantak, and annular on eroded domes.
Diagram: Sketches of a cuesta and hogback, a horst–graben pair, and trellis and radial drainage patterns.
Limits: the same rock gives different forms in different climates (granite tors in humid lands, bornhardts in savannas); long erosion can produce inverted relief such as synclinal ridges; and planation surfaces cut across structure. Structure is thus a dominant, but not exclusive, control.
Q4(c) · Biogeography · 15 marks≈ 11 min
World Distribution of Plants and Animals; Gene Pool Centres
Describe Newbigin's scheme of Floristic regions of the world and explain the Mediterranean Floristic region.
हिंदी में प्रश्न
न्यूबिगिन की संसार के पादपी मंडलों की योजना का वर्णन कीजिए और भूमध्यसागरीय पादपी मंडल को स्पष्ट कीजिए।
Practise this question Biogeography notes
Model answer
Paper and question: Paper I, Q4(c)
Approach: Outline Newbigin’s grouping of the world’s plant regions on climate and plant life-forms, then explain the Mediterranean region’s location, climate, vegetation, adaptations and human use; draw a world map of Mediterranean-type regions.
Marion Newbigin, in Plant and Animal Geography (1936), grouped the world’s vegetation into broad regions in which climate shapes the dominant plant life-forms. Indian textbooks present her scheme in slightly different forms, but its main regions are:
Forest regions: tropical rainforest, tropical monsoon and deciduous forest, temperate deciduous and evergreen forest, and coniferous forest; grassland regions: tropical savanna and temperate steppe and prairie; desert regions: hot and cold deserts; and the Mediterranean, tundra and mountain regions with their own distinctive floras.
Mediterranean floristic region: found on the western sides of continents between about 30° and 45° latitude: the Mediterranean Basin, California, central Chile, the south-western Cape of South Africa and south-western and southern Australia. Summers are hot and dry, winters mild and wet.
The vegetation is sclerophyllous evergreen woodland and scrub: cork oak, holm oak, olive and Aleppo pine, degrading into maquis and garrigue scrub; chaparral in California, matorral in Chile, fynbos in the Cape and mallee in Australia. Plants have small, thick, waxy leaves, deep roots and thick bark, and many recover after fire.
Map: World map shading the five Mediterranean-climate regions on western continental margins between 30° and 45° N and S.
The region has very high endemism; the Cape is treated as a separate floral kingdom by Ronald Good. Long human use created the ‘orchard lands’ of olive, vine and citrus, while fire, grazing and urban growth now threaten them.
Newbigin’s scheme thus links plants to climate, and the Mediterranean region shows this most clearly.

Question 5 (50 marks)

Q5(a) · Perspectives in Human Geography · 10 marks≈ 7 min
Areal Differentiation, Regional Synthesis, Dichotomy and Dualism
"Areal differentiation forms the core theme in Geography." Explain.
हिंदी में प्रश्न
"क्षेत्रीय विभेदन भूगोल की क्रोड विषय-वस्तु है।" स्पष्ट कीजिए।
Practise this question Perspectives in Human Geography notes
Model answer
Paper and question: Paper I, Q5(a)
Approach: Define areal differentiation, show why it is called the core theme (Hettner, Hartshorne, Kant), give examples, and note the criticism briefly.
Areal differentiation means the variation of the earth's surface from place to place. Richard Hartshorne (1939) described geography as the study of the variable character of the earth's surface, following Hettner's chorological view.
It is the core theme because geography is defined not by what it studies (rocks, crops, people are shared with other sciences) but by how it studies them: in their spatial association in particular areas. Kant had grouped geography with history: history studies phenomena in time, geography in space.
Every branch rests on it: climatic regions of Koppen, Whittlesey's agricultural regions, or India's contrast between the irrigated, high-yield Punjab plain and the rainfed, low-productivity Bundelkhand plateau. Explaining such contrasts through relief, climate, history and policy is the geographer's distinctive task.
Diagram: Sketch map of India contrasting three areas (Punjab plain, Bundelkhand, Kerala coast) with notes on rainfall, irrigation and density.
Critics such as Schaefer argued that it was descriptive and exceptionalist. Still, explaining why places differ remains central, now pursued through spatial analysis, GIS and studies of uneven development.
Q5(b) · Models, Theories and Laws in Human Geography · 10 marks≈ 7 min
Von Thunen, Weber, Perroux-Boudeville and Rostow
Explain 'Isodapane'.
हिंदी में प्रश्न
'आइसोडापेन' को स्पष्ट कीजिए।
Practise this question Models, Theories and Laws in Human Geography notes
Model answer
Paper and question: Paper I, Q5(b)
Approach: Define isodapane in Weber's theory, explain how it is constructed from isotims, the critical isodapane and its use in labour and agglomeration deviation, with a diagram.
An isodapane, a term used in Alfred Weber's industrial location theory (1909), is a line joining all points that have the same total transport cost for assembling raw materials and delivering the finished product to the market.
Construction: around each raw material source and the market, isotims (lines of equal transport cost) are drawn; adding the values of intersecting isotims gives total transport cost at each point, and joining points of equal total gives isodapanes. They form closed curves around the least-transport-cost point, with values rising outward.
The critical isodapane is the one whose additional transport cost equals the saving in labour cost at a cheap-labour site. If the labour site lies inside it, the industry relocates there; if outside, it stays at the least-transport-cost point. Overlapping critical isodapanes of several firms show where agglomeration is worthwhile.
Diagram: Least-cost point P surrounded by isodapanes labelled with rising costs, a cheap-labour point L inside the critical isodapane.
Isodapanes thus convert Weber's cost logic into a mappable tool.
Q5(c) · Settlement Geography · 10 marks≈ 7 min
Urban Morphology and Functional Classification of Towns
Discuss the major characteristics of 'CBD'.
हिंदी में प्रश्न
'सी.बी.डी.' (CBD) की प्रमुख विशेषताओं पर चर्चा कीजिए।
Practise this question Settlement Geography notes
Model answer
Paper and question: Paper I, Q5(c)
Approach: Define the CBD and list its major characteristics (accessibility, land value, vertical growth, functions, population, traffic, zoning) with Indian examples and a diagram.
The Central Business District (CBD) is the commercial and functional heart of a city, the zone of greatest accessibility. Burgess placed it at the centre of his concentric zone model (1925).
Characteristics: (i) highest land values, peaking at the peak land value intersection; (ii) vertical development with high-rise offices; (iii) concentration of offices, banks, department stores, hotels, theatres and government buildings; (iv) a large daytime population but few residents at night; (v) the focus of transport routes, with congestion and parking problems; (vi) internal zoning, with retail on ground floors and offices above, and specialised quarters for finance or wholesale trade; (vii) a core-frame structure: a dense core surrounded by a frame of warehouses, transport terminals and light industry (Horwood and Boyce).
Diagram: Cross-section of a CBD showing skyscrapers at the core, declining building heights towards the frame, and a land-value curve above.
Indian examples: Connaught Place in Delhi, Fort-Nariman Point in Mumbai and BBD Bagh in Kolkata. In Indian cities CBDs are often mixed with old bazaars and residences, making them less specialised than Western ones.
Q5(d) · Perspectives in Human Geography · 10 marks≈ 7 min
Areal Differentiation, Regional Synthesis, Dichotomy and Dualism
Elaborate the idea of 'Compage'.
हिंदी में प्रश्न
'कोम्पेज' की धारणा को सविस्तार समझाइए।
Practise this question Perspectives in Human Geography notes
Model answer
Paper and question: Paper I, Q5(d)
Approach: Define compage with Whittlesey's attribution, explain its features and how it differs from a simple region, give an example and a diagram.
Compage is a term proposed by Derwent Whittlesey (1954) for a region defined by the total complex of physical, biotic and societal features that are functionally associated with human occupance of the earth's surface. It expresses the idea of the region as an integrated whole.
Unlike a single-feature region (a rainfall region or a wheat region), a compage includes every element that shapes how people occupy an area: relief, climate, soils, water, vegetation, population, economy and institutions. The emphasis is on interconnection, not on any one criterion.
Its boundaries are zones of transition, and its core is where the associated features are most fully developed. Whittlesey used it to strengthen the regional concept against criticism that regions were arbitrary.
Example: the Ganga-Yamuna doab forms a compage of fertile alluvium, canal irrigation, wheat-sugarcane farming, dense nucleated villages and market towns, all interdependent.
Diagram: Concentric sketch: core where all layers overlap, surrounded by a transition zone, with labels for physical, biotic and human layers.
The idea anticipates today's systems view of regions, though critics note that identifying 'all' features objectively is difficult.
Q5(e) · Perspectives in Human Geography · 10 marks≈ 7 min
Quantitative Revolution and Locational Analysis
Discuss the application of Gravity model in Geographical studies.
हिंदी में प्रश्न
भौगोलिक अध्ययनों में गुरुत्व मॉडल के अनुप्रयोग की विवेचना कीजिए।
Practise this question Perspectives in Human Geography notes
Model answer
Paper and question: Paper I, Q5(e)
Approach: State the gravity model with its formula in words and its origin, then list its applications in geography with examples, and end with limitations.
The gravity model is an analogue of Newton's law of gravitation. It states that interaction between two places is directly proportional to the product of their masses (usually populations) and inversely proportional to the distance between them, often raised to a power. Ravenstein's migration laws anticipated it, and Zipf (1946) and Stewart formalised it.
Applications: (i) migration flows between cities, as in studies of rural-urban migration to Delhi and Mumbai; (ii) trade between countries, where large, nearby economies trade more; (iii) traffic and transport planning, estimating passenger flows between towns; (iv) Reilly's law of retail gravitation (1931) and Converse's breaking-point formula to delimit the sphere of influence of competing towns; (v) potential models measuring a city's accessibility to markets.
Diagram: Two cities of unequal size with a breaking point marked closer to the smaller city, labelled with Converse's formula in words.
Limitations: mass and distance alone cannot explain flows; borders, language, culture, cost and intervening opportunities (Stouffer, 1940) matter. Still, it remains a simple, widely used planning tool.

Question 6 (50 marks)

Q6(a) · Perspectives in Human Geography · 20 marks≈ 14 min
Quantitative Revolution and Locational Analysis
Trace the origin and progress of Quantitative Revolution in Geography and bring out its merits and demerits.
हिंदी में प्रश्न
भूगोल में मात्रात्मक क्रान्ति की उत्पत्ति और प्रगति की रूपरेखा प्रस्तुत कीजिए तथा इसके गुण और दोषों को उजागर कीजिए।
Practise this question Perspectives in Human Geography notes
Model answer
Paper and question: Paper I, Q6(a)
Approach: Trace the origin (causes, Schaefer, centres such as Washington, Iowa, Lund), the stages of progress up to GIS, then list merits and demerits and conclude with a balanced assessment.
The quantitative revolution was the shift, from the late 1950s, from descriptive regional geography to a spatial science using mathematics, statistics and theory. It was called a revolution in Kuhn's sense of a paradigm change.
Origin: dissatisfaction with Hartshorne's idiographic regional geography; the post-war growth of statistics, computers and planning; and Fred Schaefer's 'Exceptionalism in Geography' (1953), which demanded laws. Early centres were the University of Washington (Garrison, Berry, Bunge, Morrill, Tobler), Iowa (McCarty), Lund in Sweden (Hagerstrand) and Cambridge in Britain (Chorley, Haggett).
Progress: in the 1950s statistical description and location theory were revived; in the 1960s came Bunge's Theoretical Geography (1962), Haggett's Locational Analysis (1965), Chorley and Haggett's Models in Geography (1967) and Harvey's Explanation in Geography (1969); by 1963 Burton declared the revolution complete. Later, multivariate analysis, systems analysis, remote sensing and GIS carried it forward. In India it influenced urban, agricultural and regional studies from the 1960s.
Diagram: Timeline 1953-1990 with milestones: Schaefer 1953, Hagerstrand 1953, Bunge 1962, Burton 1963, Haggett 1965, Chorley-Haggett 1967, Harvey 1969, GIS in the 1980s.
Merits: objectivity and precision; generalisations and predictive models; comparability between regions; rise of applied geography in planning, transport and market analysis; links with economics and regional science; foundations for GIS.
Demerits: unrealistic assumptions (economic man, isotropic plain); neglect of human values, perception, culture and inequality; reduction of people to numbers; data and mathematical bias in developing countries; models with poor predictive success. These gave rise to behavioural, radical and humanistic geography in the 1970s.
Conclusion: the revolution made geography a scientific discipline; its critics humanised it. Today quantitative methods coexist with qualitative ones in a pluralist geography.
Q6(b) · Settlement Geography · 15 marks≈ 11 min
Rural Settlements: Types, Patterns and Environmental Issues
Discuss the role of site in determining the types and patterns of rural settlements.
हिंदी में प्रश्न
ग्रामीण बस्तियों (बसावटों) के प्रकारों एवं प्रतिरूपों का निर्धारण करने में बसाव-स्थान (साइट) की भूमिका का विवेचन कीजिए।
Practise this question Settlement Geography notes
Model answer
Paper and question: Paper I, Q6(b)
Approach: Define site and distinguish it from situation, then explain how site factors (water, relief, drainage, soil, defence, hazards) determine settlement types and patterns, with Indian examples and sketches.
The site of a settlement is the actual piece of land on which it stands, with its local physical characteristics; situation is its position relative to surrounding areas and routes. For rural settlements site is decisive, since early villagers depended on local water, land and safety.
Water supply: wet-point sites near springs, rivers and tanks produce compact villages where water is scarce, as around wells and tanks in Rajasthan and Tamil Nadu; where water is everywhere, as in Kerala's high rainfall, homesteads can be dispersed.
Drainage and flood risk: dry-point sites on natural levees, river terraces and raised mounds are chosen in floodplains and deltas; in the Bengal and Brahmaputra plains this produces linear villages along levees and hamlets on raised plinths.
Relief: level plains with fertile alluvium, as in the Ganga-Yamuna doab, favour large compact villages with a rectangular or circular pattern; rugged terrain in the Himalaya, the Western Ghats and the North-east gives small, scattered hamlets on spurs and terraces; foothill springs give spring-line villages.
Diagram: Cross-section of a floodplain showing villages on levees and terraces (dry points) and beside springs at the foot of a scarp (wet points), with plan sketches of linear and compact patterns.
Defence and hazards: hilltop and walled villages in Rajasthan and Bundelkhand; avoidance of landslide and cyclone-prone spots. Soil and land quality determine village size and spacing.
Site thus fixes the initial type and pattern, though roads, irrigation and planning later modify them.
Q6(c) · Regional Planning · 15 marks≈ 11 min
Concept of Region, Types of Regions and Regionalisation
What is a 'region'? Describe 'Thiessen' polygon method of regional delimitation.
हिंदी में प्रश्न
'प्रदेश' से क्या तात्पर्य है? प्रादेशिक परिसीमन की 'थिसीयन' बहुभुज विधि का वर्णन कीजिए।
Practise this question Regional Planning notes
Model answer
Paper and question: Paper I, Q6(c)
Approach: Define region and its types briefly, then describe the Thiessen polygon method step by step with a diagram, its uses and limitations.
A region is an area of the earth's surface distinguished from surrounding areas by one or more characteristics, natural or human. Regions may be formal (homogeneous), functional (nodal, organised around a centre) or perceptual (vernacular).
The Thiessen polygon method, devised by the American meteorologist A.H. Thiessen (1911) to estimate average rainfall from scattered rain gauges, divides space so that every location is assigned to its nearest point. The resulting polygons are also known as Voronoi diagrams.
Steps: (i) plot the points, such as rain gauges, towns or service centres, on a map; (ii) join neighbouring points with straight lines to form a network of triangles; (iii) draw perpendicular bisectors of each line; (iv) the bisectors meet to form polygons, each enclosing one point and all areas closer to it than to any other point; (v) for rainfall, multiply each station's rainfall by its polygon's area and divide the total by the whole area to get weighted average rainfall.
Diagram: Five or six scattered points joined by triangles, with perpendicular bisectors forming irregular polygons around each point.
Uses in regional delimitation: approximate trade areas or spheres of influence of towns, catchments of schools and hospitals, service areas of post offices, and hydrological sub-basins; in India it is used in rainfall analysis and in planning health-centre catchments.
Limitations: it assumes uniform space and equal attraction of all centres, ignoring size, transport routes and relief; boundaries are rigid. Weighted Thiessen polygons and GIS network analysis address some of these weaknesses.

Question 7 (50 marks)

Q7(a) · Population Geography · 20 marks≈ 14 min
Growth, Distribution and Demographic Attributes of World Population
Describe the regional pattern of Life Expectancy in the world and bring out the challenges faced by developing countries due to increasing life expectancy.
हिंदी में प्रश्न
विश्व में जीवन प्रत्याशा के प्रादेशिक प्रतिरूप का वर्णन कीजिए और बढ़ती हुई जीवन प्रत्याशा के कारण विकासशील देशों के सम्मुख चुनौतियों को उजागर कीजिए।
Practise this question Population Geography notes
Model answer
Paper and question: Paper I, Q7(a)
Approach: Define life expectancy, describe its world regional pattern with figures and reasons (with a world map), then discuss the challenges rising life expectancy creates for developing countries, using India as an example.
Life expectancy at birth is the average number of years a newborn would live if current age-specific mortality rates persisted. Global life expectancy has risen from about 47 years in 1950 to about 73 years in 2024 (UN, World Population Prospects 2024), but large regional differences remain.
Regional pattern: (i) highest, above 80 years: Japan, Hong Kong, South Korea, Singapore, Switzerland, Spain, Italy and Australia, owing to high incomes, universal health care, good diets and low infant mortality; (ii) 72-79 years: the USA, China, Latin America, the Middle East, South-east Asia; (iii) about 65-72 years: South Asia, including India (about 70 years, SRS 2016-20) and Bangladesh; (iv) lowest, often below 65 years: sub-Saharan Africa, especially Nigeria, Chad and Lesotho, because of infectious diseases, HIV/AIDS, malaria, malnutrition, conflict and weak health systems.
Map: World choropleth of life expectancy at birth in four classes, with Japan and Western Europe darkest and sub-Saharan Africa lightest.
Challenges for developing countries: (i) they are 'getting old before getting rich': India's share of people aged 60 and above is projected to rise from about 10 per cent in 2021 to about 20 per cent by 2050 (UNFPA, India Ageing Report 2023); (ii) weak pension and social security coverage, with most workers in the informal sector; (iii) the rising burden of non-communicable diseases (diabetes, heart disease, dementia) on under-funded health systems; (iv) breakdown of joint families and migration of the young leave elderly, especially widows, without care; (v) gender issues, since elderly women are poorer and more often alone.
Responses include the Indira Gandhi National Old Age Pension Scheme, Atal Pension Yojana, Ayushman Bharat health cover extended to all aged 70 and above (2024) and the Senior Citizens Act (2007).
Rising longevity is a success of development, but it requires planning for health, income security and care.
Q7(b) · Perspectives in Human Geography · 15 marks≈ 11 min
Environmentalism, Possibilism and Neo-determinism
Discuss the relevance of 'Stop and Go Determinism' in the present day context.
हिंदी में प्रश्न
वर्तमान समय के संदर्भ में 'रुको और जाओ निर्धारणवाद' की प्रासंगिकता पर चर्चा कीजिए।
Practise this question Perspectives in Human Geography notes
Model answer
Paper and question: Paper I, Q7(b)
Approach: Explain Griffith Taylor's stop-and-go determinism with his traffic analogy, then test its relevance against present-day examples (climate change, disasters, Himalayan development, deserts) and end with a balanced view.
Stop-and-go determinism, or neo-determinism, was proposed by Griffith Taylor, based on his studies of Australia in the 1920s-40s. He compared man to a traffic controller in a city: he can speed up, slow down or stop the pace of development, but he cannot change the direction set by nature, just as the controller cannot change the road plan.
Taylor showed that the arid interior of Australia would never support dense settlement whatever the technology, and his forecasts, unpopular then, proved correct. The view is a middle path between Ratzel-Semple determinism and Vidal-Febvre possibilism.
Present-day relevance: (i) climate change, sea-level rise and heatwaves show the limits nature sets on human ambition; (ii) the Joshimath land subsidence (2023) and the Kedarnath floods (2013) show that ignoring Himalayan fragility brings a 'stop' signal; (iii) groundwater depletion in Punjab and Rajasthan limits the Green Revolution model; (iv) planetary boundaries (Rockstrom, 2009) restate Taylor's idea in scientific terms.
Diagram: Traffic-signal sketch: green (go: technology, irrigation), amber (caution: carrying capacity) and red (stop: natural limits such as aridity, slope, hazards) along a road whose direction is fixed by nature.
At the same time technology does stretch limits: Israel's drip irrigation, the Indira Gandhi Canal in the Thar, and polders in the Netherlands. Hence the concept is highly relevant as a guide to sustainable development and disaster-resilient planning, provided it is read as limits-and-choices rather than strict control.
Q7(c) · Models, Theories and Laws in Human Geography · 15 marks≈ 11 min
Heartland and Rimland Theories; Boundaries and Frontiers
Define and differentiate between boundaries and frontiers. Describe the geometrical boundaries with suitable examples.
हिंदी में प्रश्न
सीमाओं और सीमांतों की परिभाषा दीजिए और उनमें विभेदन कीजिए। ज्यामितीय सीमाओं का उचित उदाहरणों सहित वर्णन कीजिए।
Practise this question Models, Theories and Laws in Human Geography notes
Model answer
Paper and question: Paper I, Q7(c)
Approach: Define boundary and frontier and differentiate them (Kristof), then describe geometrical boundaries with world examples and their problems, with a map.
A boundary is a line that marks the legal limit of a state's sovereignty, agreed by treaty, delimited on maps and demarcated on the ground. A frontier is a zone or belt between states or between settled and unsettled areas, often sparsely populated and of transition. Ladis Kristof (1959) noted that the frontier is outward-looking and integrating, while the boundary is inward-looking and separating.
Differences: line versus zone; legal versus historical or natural; fixed versus shifting; centripetal versus centrifugal; and modern versus older political systems. Frontiers such as the Himalaya and the deserts once separated South Asian states; today most have been replaced by boundaries, except where disputed, as along parts of the India-China border.
Geometrical boundaries are straight lines following parallels or meridians or joining points, drawn without regard to relief or culture. Examples: the 49th parallel between the USA and Canada; the 141st meridian between Alaska and Yukon; the 22nd parallel between Egypt and Sudan; straight colonial lines across the Sahara dividing Libya, Algeria, Niger, Mali and Mauritania; and the Korean armistice line near the 38th parallel.
Map: World sketch showing the 49th parallel, the 141st meridian, the Egypt-Sudan line and Saharan straight boundaries, with a small inset contrasting a frontier zone and a boundary line.
Geometrical boundaries are easy to draw in sparsely settled lands, but they often split ethnic groups, pastures and river basins, causing disputes such as over the Halaib triangle, and illustrate the arbitrariness of colonial boundary-making.

Question 8 (50 marks)

Q8(a) · Models, Theories and Laws in Human Geography · 20 marks≈ 14 min
Central Place Theories of Christaller and Losch
Give a critical account of Losch's theory of central places.
हिंदी में प्रश्न
लॉश की केंद्रीय स्थानों की थियोरी का समालोचनात्मक विवरण दीजिए।
Practise this question Models, Theories and Laws in Human Geography notes
Model answer
Paper and question: Paper I, Q8(a)
Approach: Present Losch's theory (assumptions, demand cone, variable k, superimposed nets, city-rich and city-poor sectors) with diagrams, compare with Christaller, and give a critical evaluation of merits and weaknesses.
August Losch, a German economist, developed his theory in The Economics of Location (German 1940, English 1954). He sought a general equilibrium of economic location, assuming a uniform plain with evenly distributed, identical farm population and equal transport costs in all directions.
The theory: demand for any good declines with distance, forming a demand cone; competition packs circular market areas into hexagons; since each good has a different threshold, market areas differ in size, giving many hexagonal nets with variable k values (3, 4, 7, 9, 12 and more). Superimposing all nets on a single metropolis and rotating them to maximise coincidence of centres produces an economic landscape of six city-rich and six city-poor sectors, with a continuous rather than stepped hierarchy.
Comparison with Christaller: Christaller's fixed k gives a rigid hierarchy in which higher-order places perform all lower-order functions; Losch's variable k allows specialised places, so centres of the same size may have different functions. Christaller started from the top of the hierarchy, Losch from the bottom (farm demand).
Diagram: Demand cone, a set of hexagonal nets of different sizes, and the twelve-sector economic landscape around a metropolis.
Merits: more flexible and realistic; profit-maximising logic; explains sectoral clustering along routes and specialised towns; theoretically rigorous and influential in regional science (Isard).
Weaknesses: unrealistic assumptions of uniform population and plain; static and ahistorical; ignores transport networks, agglomeration and government; difficult to test because of its complexity; and it applies best to manufacturing of consumer goods rather than modern services. Losch's theory therefore remains a refined theoretical model rather than a direct description of real landscapes.
Q8(b) · Economic Geography · 15 marks≈ 11 min
World Industries and Patterns of World Trade
"Linkages between resource-endowed regions and resource-utilizing regions determine the pattern of international trade." Elaborate with suitable examples.
हिंदी में प्रश्न
"संसाधन-सम्पन्न प्रदेशों और संसाधन-उपयोगकर्ता प्रदेशों के बीच संयोजन, अन्तर्राष्ट्रीय व्यापार के प्रतिरूप को निर्धारित करते हैं।" उचित उदाहरणों सहित सविस्तार समझाइए।
Practise this question Economic Geography notes
Model answer
Paper and question: Paper I, Q8(b)
Approach: Explain the theoretical basis (uneven resource distribution, Heckscher-Ohlin factor endowment), illustrate resource-endowed to resource-using flows with examples and a world map, then show the limits of the statement (manufactures, services, intra-industry trade).
International trade arises because resources are unevenly distributed. The Heckscher-Ohlin theory holds that countries export goods that use their abundant factors and import those that use scarce ones. Linkages between resource-endowed and resource-utilising regions thus form the backbone of trade in primary goods.
Examples: (i) oil and gas from the Persian Gulf, Russia and Norway to Europe, China, Japan, South Korea and India; (ii) iron ore from Australia's Pilbara and Brazil's Carajas to Chinese and Japanese steel mills; (iii) coal from Indonesia and Australia to India and China; (iv) soybeans from Brazil and the USA to China; (v) copper from Chile and Peru, and cobalt from the DRC, to Asian processors; (vi) India imports crude oil and exports refined products from Jamnagar.
These linkages shape ports, shipping routes and chokepoints such as the Strait of Hormuz and Malacca, and give rise to dependence and price risks for both exporters and importers.
Map: World map of major flows: Gulf oil to Asia and Europe, Australian iron ore and coal to East Asia, Brazilian ore and soy to China, Chilean copper to Asia.
Limits: most world trade today is in manufactured goods and services, much of it between similar, developed economies (intra-industry trade, explained by Krugman's new trade theory through economies of scale and product variety); Japan and South Korea prosper with few resources; and value chains, technology and policy shape trade as much as endowment.
Hence resource linkages determine the pattern of trade in primary commodities, but not the whole pattern of international trade.
Q8(c) · Regional Planning · 15 marks≈ 11 min
Environmental Issues and Planning for Sustainable Development
In what ways can geographers contribute towards optimal land use planning in a region?
हिंदी में प्रश्न
किसी प्रदेश में इष्टतम भूमि-उपयोग नियोजन की दिशा में भूगोलवेत्ता किस-किस तरह से योगदान कर सकते हैं?
Practise this question Regional Planning notes
Model answer
Paper and question: Paper I, Q8(c)
Approach: Define optimal land use planning, then explain the geographer's contributions (survey and mapping, land capability classification, RS-GIS, integrated regional analysis, suitability modelling, participatory planning, monitoring) with Indian examples.
Optimal land use planning allocates land among agriculture, forest, settlement, industry, water and conservation so as to maximise long-term social benefit without degrading the resource. Geography, as the science of spatial relationships between people and environment, is well placed to guide it.
Contributions: (i) survey and mapping of land use and land cover: Dudley Stamp's Land Utilisation Survey of Britain (1930s) is a classic, and in India the National Remote Sensing Centre maps land use at 1:50,000; (ii) land capability classification into eight classes (USDA scheme), separating land suited to intensive cropping from land fit only for grazing or forest; (iii) remote sensing and GIS overlay of soils, slope, water, settlement and infrastructure to identify suitable sites, as in watershed planning and wasteland mapping; (iv) integrated regional analysis linking land use with population, markets and transport, using models such as Von Thunen's to explain patterns; (v) hazard zonation, avoiding floodplains and landslide-prone slopes; (vi) participatory mapping with communities; (vii) monitoring change and enforcing plans.
Diagram: GIS overlay of soil, slope, water availability and settlement layers producing a land suitability map with zones for agriculture, forest, settlement and conservation.
Indian applications: agro-climatic zoning, the Integrated Watershed Management Programme, Desertification and Land Degradation Atlas (ISRO), and the Draft National Land Use Policy (2013). Geographers thus provide data, synthesis and spatial reasoning for optimal land use.

UPSC Mains 2016 Geography Paper II