MEMORY: “H-F-L-E” — Health • Food • Livelihood • Ecosystem.
04 · Government Initiatives
Jal Jeevan Mission & Atal Bhujal Yojana
Programme
Chapter detail
Memory cue
Jal Jeevan Mission
Goal: assured potable piped water to every rural household at 55 litres per capita
per day regularly on a long-term basis, ensuring functionality of tap connections.
Rural tap water
Atal Bhujal Yojana
Implemented in 8,220 water-stressed Gram Panchayats in 229 blocks/talukas across 80
districts of seven states; promotes behavioural change towards conservation and
smart management.
Community conservation
STATES UNDER ATAL JAL IN THE CHAPTER: Gujarat, Haryana, Karnataka,
Madhya Pradesh, Maharashtra, Rajasthan and Uttar Pradesh.
DATE/NUMBER TIP: For JJM remember 55 LPCD; for Atal Jal
remember 8,220 GPs • 229 blocks/talukas • 80 districts • 7 states.
05 · Multi-purpose Projects
Dams — From Irrigation to Multiple Uses
Modern dams are called multi-purpose projects because several uses of impounded water
are integrated.
Irrigation
Electricity generation
Domestic and industrial water supply
Flood control
Recreation
Inland navigation
Fish breeding
MNEMONIC: “I-E-W-F-R-N-F” — Irrigation • Electricity • Water supply •
Flood control • Recreation • Navigation • Fish breeding.
EXAMPLES: Bhakra-Nangal: hydel power + irrigation. Hirakud: water
conservation + flood control.
06 · Criticism & Impacts
Problems Associated with Large Dams
The chapter records environmental and ecological consequences that led to scrutiny and
opposition.
Poor sediment flow and excessive sedimentation.
Rockier stream beds and poorer aquatic habitats.
River fragmentation makes aquatic fauna migration/spawning difficult.
Reservoirs submerge vegetation and soil.
Sedimentation can reduce flood-control effectiveness and trigger floods.
Floods may cause loss of life/property and soil erosion.
Floodplains can lose silt, a natural fertiliser.
Projects have been observed to induce earthquakes and contribute to water-borne diseases, pests
and pollution.
Irrigation can encourage water-intensive/commercial crops and cause soil salinisation.
MEMORY: “FLOW–FISH–FLOOD–FARM” — River flow • fish migration • flood
behaviour • farming/cropping effects.
BALANCED ANSWER: Never write that dams have only benefits or only
problems. Compare their multiple uses with the environmental/social concerns described in the
chapter.
07 · Major Projects
Sardar Sarovar Project
Point
Chapter detail
River / State
Narmada River, Gujarat
States covered
Maharashtra, Madhya Pradesh, Gujarat and Rajasthan
Gujarat irrigation
18.45 lakh hectares; 3,112 villages; 15 districts
Rajasthan
2,46,000 hectares in Barmer and Jalore
Maharashtra
37,500 hectares in tribal hilly tract through lift
Command area
About 75% in Gujarat is drought-prone; entire Rajasthan command is drought-prone.
CORE PURPOSE IN THE CHAPTER: The project is presented as meeting
water requirements of drought-prone and desert areas.
08 · Water Disputes
Inter-state Water Disputes
The chapter gives the Krishna-Godavari dispute as an example. It describes objections by
Karnataka and Andhra Pradesh to diversion of more water at Koyna by Maharashtra for a multi-purpose
project, with concern about reduced downstream flow affecting agriculture and industry.
Traditional systems were adapted to local ecology, rainfall, soils, terrain and water
needs.
REGION TRICK:Hills–Kuls • Rajasthan–Khadins/Johads/Tankas •
Bengal–Inundation • Meghalaya–Bamboo Drip.
10 · Rooftop Harvesting
Rooftop Rainwater Harvesting
Chapter flow: roof → pipe → filtration → sump for use → excess to well for groundwater
recharge.
RAJASTHAN: Underground tankas stored drinking water; rainwater/palar
pani is described as the purest form of natural water in these parts.
TAMIL NADU: The chapter states it is the first state to make rooftop
rainwater harvesting structures compulsory for all houses.
SHILLONG: Rooftop harvesting is common despite high rainfall in
nearby Cherrapunjee and Mawsynram; the chapter states it supplies about 15–25% of household water
requirement.
GENDATHUR: Nearly 200 households installed rooftop systems; the
chapter gives about 1,000 mm annual precipitation and around 50,000 litres annually per house under
the stated assumptions.
11 · Bamboo Drip Irrigation
200-Year-Old Meghalaya System
Stream and spring water is diverted through bamboo pipes by gravity; reduced channel
sections deliver controlled drops near plant roots.
MEMORY: “BAMBOO = GRAVITY + CONTROLLED DROPS.”
NCERT Exercise
All exercise questions from the supplied chapter text.
1 · Multiple Choice / Correct Classification
(i) Classify as suffering from water scarcity or not: (a) high annual rainfall;
(b) high annual rainfall + large population; (c) high annual rainfall + highly polluted water; (d)
low rainfall + low population.
(ii) Which statement is not an argument in favour of multi-purpose river
projects? (a) Bring water to water-scarce areas. (b) Regulate water flow to help control floods.
(c) Lead to large-scale displacement and loss of livelihood. (d) Generate electricity.
(iii) Identify mistakes and rewrite correctly: urbanisation and water utilisation;
effect of damming on natural/sediment flow; rooftop harvesting in Rajasthan.
Answer cues
(i) (a) not necessarily scarce; (b) scarcity possible; (c) scarcity due quality; (d)
scarcity likely from low rainfall. (ii) (c). (iii) Urban growth aggravates
demand/over-exploitation; dams affect natural and sediment flow; Rajasthan rooftop harvesting
has declined in areas with canal supply, though some tankas remain.
2 · About 30 Words
(i) Explain how water becomes a renewable resource.
(ii) What is water scarcity and what are its main causes?
(iii) Compare advantages and disadvantages of multi-purpose river projects.
3 · About 120 Words
(i) Discuss how rainwater harvesting in semi-arid regions of Rajasthan is carried
out.
(ii) Describe how modern adaptations of traditional rainwater harvesting methods
are being carried out to conserve and store water.
120-word answer blueprint
Rajasthan: rooftop collection → pipes → underground tankas → first rain discarded →
subsequent rain stored → reliable summer drinking source; mention khadins/johads where relevant.
Modern adaptation: rooftop systems, filtration, sump, well recharge, community
installation such as Gendathur, compulsory policy in Tamil Nadu and widespread adaptation.
Practice Worksheets
Concept-first questions for retention and exam application.
Worksheet A · Scarcity & Conservation
1. Why can a region with abundant water still face scarcity?
2. Explain four causes of water scarcity.
3. Why is irrigated agriculture a major pressure on water resources?
4. Explain why water quality can create scarcity.
Worksheet B · Dams & Impacts
1. List seven uses of multi-purpose projects.
2. Explain four environmental impacts of dams.
3. Explain how irrigation changes cropping patterns.
4. Why have multi-purpose projects come under scrutiny?
Narmada; four states; major irrigation benefits for drought-prone/desert areas as described.
12. Water Dispute
Krishna-Godavari example: upstream diversion can reduce downstream flow.
13. Traditional Systems
Guls/kuls, inundation channels, khadins, johads and tankas.
14. Rooftop Harvesting
Roof → pipe → filter → sump → use/recharge; first rain often excluded.
15. Meghalaya
200-year-old bamboo drip system uses gravity and controlled drops near plant roots.
ULTRA-FAST: Water is renewable, but usable freshwater is limited. Scarcity
comes from more than drought. Conserve, manage, evaluate dams critically, and use locally adapted
harvesting.
REGION MAP: Western Himalayas = guls/kuls • Bengal = inundation channels
• Rajasthan = khadins/johads/tankas • Meghalaya = bamboo drip • Tamil Nadu = compulsory rooftop
harvesting.