Chapter 3: Water Resources Long Questions | geography Class 10 CBSE

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Chapter 3: Water Resources Long Questions | geography Class 10 CBSE | ByteNotes.in

Long Answer

Hard difficulty • Structured explanation

Hard

Question 1

Long Form

Analyse the multiple causes that lead to water scarcity in a region, even when the region receives adequate rainfall.

A large and growing population increases demand for water for domestic use and food production, making rainfall insufficient to meet needs even in high-rainfall areas.
Over-exploitation of water resources, particularly through tube-wells and bore-wells for irrigated agriculture, depletes groundwater faster than it can be recharged.
Pollution from domestic wastes, industrial effluents, pesticides, and fertilisers can make available water hazardous, creating qualitative scarcity alongside quantitative abundance.
Urbanisation leads to dense populations and rising lifestyles that demand far more water and energy than rural communities, straining local water supplies.
Unequal access among social groups means that even where water exists, marginalised communities may not receive adequate supply, creating social water scarcity.

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Question 2

Long Form

Compare the advantages and disadvantages of multi-purpose river projects in India.

Advantages include irrigation of vast agricultural areas, generation of hydroelectric power, flood control, domestic and industrial water supply, inland navigation, and fish breeding.
Multi-purpose projects helped post-independence India develop agriculture and industry simultaneously, symbolising national progress as Nehru called dams 'temples of modern India'.
However, these projects disrupt natural river flow, cause poor sediment transport, and result in rockier stream beds that harm aquatic habitats and biodiversity.
Dams fragment rivers, preventing aquatic fauna from migrating for spawning, and reservoir submergence destroys forests, vegetation, and displaces human settlements.
Paradoxically, dams built to control floods have triggered flooding due to reservoir sedimentation, deprived farmland of silt-rich natural fertiliser, and induced earthquakes and water-borne diseases.

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Question 3

Long Form

Discuss the traditional water harvesting methods practised in different regions of India and explain how they were adapted to local ecological conditions.

In the Western Himalayas, diversion channels called 'guls' or 'kuls' were constructed to direct river water downhill for agricultural irrigation in terraced mountain fields.
In Bengal's flood plains, communities built inundation channels to channel seasonal floodwaters of rivers to irrigate their fields, turning floods into a resource.
In arid Rajasthan, 'khadins' in Jaisalmer and 'johads' across other areas were created to store rainwater and allow it to moisten the soil for crops suited to dry conditions.
In semi-arid Rajasthan, underground 'tankas' inside houses collected rainwater from rooftops through pipes, providing a reliable drinking water source through the dry summer months.
In Meghalaya, a 200-year-old bamboo pipe system taps perennial spring and stream water and transports it by gravity over hundreds of metres to agriculture sites, reflecting adaptation to a hilly, forested ecology.

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Question 4

Long Form

Examine the ecological consequences of large dams and multi-purpose projects, and suggest why traditional water harvesting is considered a better alternative.

Large dams cause excessive sedimentation in reservoirs, reduce sediment flow downstream, create rockier riverbeds, and damage aquatic habitats, harming fish and other river life.
Dams fragment rivers, blocking spawning migration of fish, and submerge vast forested and agricultural land in the reservoir zone, destroying ecosystems and displacing communities.
Irrigation from these projects has altered cropping patterns toward water-intensive commercial crops, leading to salinisation of soil and long-term land degradation.
Projects have induced earthquakes, spread water-borne diseases, and deprived floodplains of silt — a natural fertiliser — increasing dependence on chemical inputs.
Traditional water harvesting systems like johads, tankas, and guls are decentralised, locally maintained, ecologically non-intrusive, and culturally embedded, offering sustainable water security without large-scale displacement or ecological disruption.

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Medium

Question 5

Long Form

Describe how rooftop rainwater harvesting has been adapted in different states of India. What role has legislation played in its promotion?

In semi-arid Rajasthan, underground tankas were traditionally built inside homes and connected to roofs by pipes to collect rainwater for drinking during the dry season.
In Gendathur village, Karnataka, around 200 households installed rooftop harvesting systems; with 80 percent collection efficiency, each house collects about 50,000 litres annually, and the village collectively harvests 1,00,000 litres.
In Shillong, Meghalaya, nearly every household has a rooftop harvesting structure, meeting 15–25 percent of total water needs, despite the town's proximity to the world's rainiest regions.
Tamil Nadu pioneered legislation by making rooftop rainwater harvesting compulsory for all houses across the state, with legal penalties for defaulters, setting a national precedent.
These adaptations demonstrate that rooftop rainwater harvesting is versatile, scalable from individual households to entire communities, and effective across diverse climatic and geographic regions of India.

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Medium

Question 6

Long Form

How has intensive industrialisation and urbanisation after Independence worsened the water crisis in India?

Post-independence industrialisation led to large industrial houses and multinational corporations that are heavy consumers of freshwater for their operations.
Industries require enormous amounts of electricity, much of which comes from hydroelectric power, increasing the pressure on river systems and freshwater reserves.
Multiplying urban centres with dense populations and modern lifestyles demand far more water and energy than can be sustainably supplied from existing sources.
Urban housing societies and colonies rely on private groundwater pumping devices, leading to falling water tables and depletion of groundwater in several cities.
Industrial effluents and urban domestic waste pollute rivers and groundwater, reducing the quality and availability of usable freshwater and intensifying the water crisis.

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Question 7

Long Form

Critically examine how the Damodar and Bhakra-Nangal projects represent different visions and outcomes of dam-based water management in India.

The Damodar River was historically known as the 'river of sorrow' due to devastating floods that disrupted lives and agriculture in the valley, inspiring the Damodar Valley project.
A popular Bhadu folk song from the region captures the community's plea to the river to reduce floods so that boats could sail and life could return to normal.
The Bhakra-Nangal project on the Sutluj-Beas river basin represents a more integrated vision — combining hydel power generation with large-scale irrigation across North India.
While Bhakra-Nangal is widely celebrated as a success in providing both power and water, multi-purpose projects across India, including Damodar, have been criticised for triggering floods through sedimentation.
Both projects highlight the dual nature of dam-based management: the ambition to tame rivers for development versus the ecological and social costs of disrupting natural water systems.

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Question 8

Long Form

Explain the significance of ancient hydraulic structures in India and how they demonstrate that water management is not a modern invention.

In the first century B.C., Sringaverapura near Allahabad had a sophisticated system that channelled Ganga floodwaters, showing advanced hydraulic knowledge in ancient India.
During Chandragupta Maurya's time, dams, lakes, and irrigation networks were extensively built, demonstrating state-level water resource planning nearly 2,300 years ago.
Evidence of sophisticated irrigation works has been found in Kalinga (Odisha), Nagarjunakonda (Andhra Pradesh), Bennur (Karnataka), and Kolhapur (Maharashtra).
In the 11th century, Bhopal Lake — one of the largest artificial lakes of its era — was constructed; in the 14th century, Iltutmish built the Hauz Khas tank to supply water to Siri Fort in Delhi.
These structures reveal that Indian civilisations developed deep knowledge of rainfall, soils, and terrain to create diverse and durable hydraulic systems long before modern engineering existed.

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Medium

Question 9

Long Form

Analyse the Sardar Sarovar project as a case study of a multi-purpose river project, covering its objectives, coverage, and significance.

The Sardar Sarovar Dam is built on the Narmada River in Gujarat and is one of the largest water resource projects in India, covering four states — Maharashtra, Madhya Pradesh, Gujarat, and Rajasthan.
The project is designed to meet water needs in drought-prone and desert areas; about 75 percent of the command area in Gujarat is drought-prone and the entire Rajasthan command is drought-prone.
It provides irrigation facilities to 18.45 lakh hectares of land covering 3,112 villages across 15 districts of Gujarat, addressing persistent agricultural water scarcity.
The project also irrigates 2,46,000 hectares in the desert districts of Barmer and Jalore in Rajasthan and 37,500 hectares in tribal hilly tracts of Maharashtra through lift irrigation.
Assured water supply is expected to make these areas drought-proof, transforming agricultural productivity and rural livelihoods in one of India's most water-stressed regions.

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Hard

Question 10

Long Form

Discuss why water scarcity is increasingly being described as both a quantitative and qualitative problem.

Quantitative water scarcity occurs when the actual volume of available water — surface water and groundwater — is insufficient to meet population needs due to over-exploitation or low rainfall.
Qualitative water scarcity arises when water is available in adequate amounts but is polluted by domestic waste, industrial effluents, chemicals, pesticides, and fertilisers, making it hazardous.
A region may have high annual rainfall but still face scarcity if industrial and agricultural pollution has rendered most of its water unsafe for drinking or domestic use.
Urban areas particularly illustrate qualitative scarcity: despite large water infrastructure, fragile water resources are over-exploited and polluted, making the water unfit for use.
The Jal Jeevan Mission addresses both dimensions by ensuring not just supply but the quality and reliability of piped potable water to every rural household at 55 litres per capita per day.

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Chapter 3: Water Resources | Long Questions

Analyse the multiple causes that lead to water scarcity in a region, even when the region receives adequate rainfall.

Compare the advantages and disadvantages of multi-purpose river projects in India.

Discuss the traditional water harvesting methods practised in different regions of India and explain how they were adapted to local ecological conditions.

Examine the ecological consequences of large dams and multi-purpose projects, and suggest why traditional water harvesting is considered a better alternative.

Describe how rooftop rainwater harvesting has been adapted in different states of India. What role has legislation played in its promotion?

How has intensive industrialisation and urbanisation after Independence worsened the water crisis in India?

Critically examine how the Damodar and Bhakra-Nangal projects represent different visions and outcomes of dam-based water management in India.

Explain the significance of ancient hydraulic structures in India and how they demonstrate that water management is not a modern invention.

Analyse the Sardar Sarovar project as a case study of a multi-purpose river project, covering its objectives, coverage, and significance.

Discuss why water scarcity is increasingly being described as both a quantitative and qualitative problem.

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