Geography
Indian Agriculture
Irrigation in India
Irrigation in India for CGPSC: need, sources and shares, project classes, Bhakra, Hirakud, Tehri and other projects, micro-irrigation, PMKSY, river linking.
Prerequisites
- Drainage System of India: Himalayan and peninsular rivers and their regimes
- Cropping Seasons and Farming Systems: why rabi and zaid need stored water
- Irrigation Projects of Chhattisgarh: the state’s dams river by river
The Hook: The Mahanadi Leaves Chhattisgarh
Connect
The Mahanadi (महानदी) rises near Sihawa in Dhamtari district, feeds the Gangrel reservoir and the canals of the Chhattisgarh plain, and then flows into Odisha, where it fills the Hirakud reservoir behind one of the longest earthen dams in the world. How much water each state may hold back has become an inter-state dispute before a tribunal.
The same river shows the two faces of Indian irrigation: big canals that turned deltas into granaries, and disputes, displacement and unfinished canal networks. Where does India’s irrigation water come from, and which projects matter most?
Why it matters: Prelims asks the main source of irrigation, dam–river–state matching, “highest / longest” projects and scheme names. Mains GS-III asks about groundwater stress, micro-irrigation and the cost and value of big dams.
Why India Needs Irrigation
- Seasonal rainfall: most rain falls in about four monsoon months, so rabi and zaid crops need stored water.
- Uneven spatial spread: western Rajasthan, the rain-shadow Deccan and parts of Gujarat get little rain.
- Monsoon variability: late onset, long breaks and early withdrawal damage rain-fed crops.
- High-yielding varieties need assured, timed water to deliver their yields.
- Multiple cropping: irrigation is what lifts cropping intensity above a single crop.
Status (dated)
- A little over half of India’s net sown area is irrigated (early 2020s; NITI Aayog put it at about 52% in 2022-23, and other series give slightly higher figures).
- The rest is rain-fed, concentrated in central India, the Deccan and the western dry belt. Chhattisgarh irrigates only about a third of its sown area.
Sources of Irrigation
| Source | Share of net irrigated area | Where it dominates | Notes |
|---|---|---|---|
| Tube wells and other wells (groundwater) | About three-fifths (roughly 60–65%) — the largest source | Punjab, Haryana, western UP, Gujarat, Rajasthan, Bihar | Grew fastest after the Green Revolution with cheap electricity and diesel pumps; Uttar Pradesh has the largest tube-well irrigated area |
| Canals | About a quarter | Northern plains (Sutlej–Ganga) and east-coast deltas (Mahanadi, Godavari, Krishna, Kaveri) | Need perennial rivers or large reservoirs; the main source in Chhattisgarh’s Mahanadi plain |
| Tanks | A small and falling share (a few per cent) | Peninsular India: Tamil Nadu, Karnataka, Telangana, Andhra Pradesh | Hard rock holds little groundwater and rivers are seasonal, so rain is stored behind small bunds |
| Others | Small | Springs, lift irrigation, kuhls (hill channels) |
Shares are rounded from Land Use Statistics of recent years and vary slightly by year.
Why tanks in the south, tube wells in the north
The Indo-Gangetic plain sits on deep, soft alluvium that stores huge amounts of groundwater and is easy to drill. The peninsula is hard crystalline rock with thin soil, little groundwater and seasonal rivers, so people built tanks to catch monsoon run-off. Many south Indian tanks date back centuries.
Classification of irrigation projects
Since the Fifth Plan, projects are classified by culturable command area (CCA):
| Class | CCA |
|---|---|
| Major | More than 10,000 ha |
| Medium | 2,000 to 10,000 ha |
| Minor | Less than 2,000 ha (includes most wells, tube wells and tanks) |
Major Irrigation and Multipurpose Projects
Jawaharlal Nehru called the big river-valley projects the “temples of modern India”. A multipurpose project serves several purposes at once: irrigation, hydropower, flood control, drinking water, navigation and fisheries.
| Project | River | State(s) | Key fact |
|---|---|---|---|
| Bhakra Nangal | Sutlej | Himachal Pradesh, Punjab (benefits Haryana, Rajasthan) | Bhakra dam is about 226 m high, India’s second-highest; reservoir Gobind Sagar |
| Tehri | Bhagirathi | Uttarakhand | 260.5 m, the highest dam in India (rock- and earth-fill) |
| Hirakud | Mahanadi | Odisha | About 25.8 km including dykes: the longest dam in India, often called the longest major earthen dam in the world |
| Damodar Valley Corporation (DVC) | Damodar | Jharkhand, West Bengal | Set up in 1948, India’s first multipurpose river-valley project after independence, modelled on the Tennessee Valley Authority (USA); the Damodar was called the “Sorrow of Bengal” |
| Sardar Sarovar | Narmada | Gujarat (benefits Gujarat, Rajasthan, Maharashtra, MP) | Dedicated in 2017; long opposed by the Narmada Bachao Andolan over displacement |
| Indira Gandhi Canal (Rajasthan Canal) | Water from the Harike barrage at the Sutlej–Beas confluence, Punjab | Rajasthan | Commonly described as India’s longest canal; brought irrigation to the Thar, with waterlogging and salinity as side effects |
| Nagarjuna Sagar | Krishna | Telangana – Andhra Pradesh | Among the largest masonry dams in India |
| Tungabhadra | Tungabhadra | Karnataka (shared with Andhra Pradesh, Telangana) | Joint project |
| Chambal Valley | Chambal | Madhya Pradesh, Rajasthan | Gandhi Sagar, Rana Pratap Sagar, Jawahar Sagar dams |
| Kosi | Kosi | Bihar (with Nepal) | Flood control on the “Sorrow of Bihar” |
Chhattisgarh connection
The Mahanadi rises in Chhattisgarh and is dammed at Gangrel (Dhamtari) before it reaches Hirakud in Odisha. Odisha’s objection to new barrages upstream led to the Mahanadi Water Disputes Tribunal (2018). Details are in Irrigation Projects of Chhattisgarh.
Saving Water: Micro-Irrigation and Water Management
| Method | How it works | Best for |
|---|---|---|
| Drip irrigation (टपक सिंचाई) | Water delivered drop by drop to the root zone through pipes and emitters | Orchards, vegetables, sugarcane, cotton; dry regions |
| Sprinkler irrigation (फव्वारा सिंचाई) | Water sprayed like rain through nozzles | Uneven or sandy land; wheat, pulses, oilseeds |
| Watershed development | Treat a whole catchment: contour bunds, check dams, plantation | Rain-fed uplands such as the Bastar plateau |
| Rainwater harvesting | Ponds, farm ponds, recharge wells | Everywhere; revives traditional tanks |
Micro-irrigation cuts water use substantially compared with flood irrigation and also saves fertiliser (fertigation) and labour.
Government Schemes
| Scheme | Year | What it does |
|---|---|---|
| Accelerated Irrigation Benefit Programme (AIBP) | 1996-97 | Central help to finish ongoing major and medium projects; now a component of PMKSY |
| Pradhan Mantri Krishi Sinchayee Yojana (PMKSY) | Approved 1 July 2015 | Umbrella scheme. Mottos: “Har Khet Ko Pani” (water to every field) and “Per Drop More Crop”. Components: AIBP; Har Khet Ko Pani (command area development, surface minor irrigation, repair-renovation-restoration of water bodies, groundwater development); Watershed Development (Department of Land Resources) |
| Per Drop More Crop (micro-irrigation) | 2015-22 under PMKSY | Since 2022 implemented under the Rashtriya Krishi Vikas Yojana (RKVY) |
| PMKSY extension | 2021-26 | Approved with an outlay of about ₹93,068 crore |
| Atal Bhujal Yojana (Atal Jal) | Launched 25 December 2019 | Community-led groundwater management in water-stressed areas of seven states: Gujarat, Haryana, Karnataka, Madhya Pradesh, Maharashtra, Rajasthan, Uttar Pradesh |
Interlinking of rivers
- The National Perspective Plan (1980) proposed transferring water from surplus to deficit basins. The National Water Development Agency (NWDA) was set up in 1982 to study it.
- It identifies 30 links: 14 in the Himalayan component and 16 in the peninsular component.
- Ken–Betwa link (Madhya Pradesh and Uttar Pradesh, Bundelkhand) is the first link taken up for implementation; its foundation stone was laid on 25 December 2024. Its Daudhan dam on the Ken lies in the Panna Tiger Reserve, which raised ecological concerns.
Analysis: Issues in Indian Irrigation (Mains)
- Groundwater depletion: irrigation takes most of India’s groundwater draft. Cheap or free farm power and assured procurement of rice have driven over-extraction in Punjab, Haryana and parts of Rajasthan.
- Waterlogging and salinity in canal command areas, such as parts of the Indira Gandhi Canal and the Punjab–Haryana plain.
- Gap between potential created and utilised: incomplete distributaries and field channels mean dams are built but water does not reach fields. Command area development is meant to close this gap.
- Low water-use efficiency of flood irrigation in rice and sugarcane.
- Social and ecological costs of large dams: displacement (Sardar Sarovar), loss of forest and wildlife habitat (Ken–Betwa), silting of reservoirs.
- Inter-state disputes: Kaveri, Krishna, Mahanadi.
- Neglect of tanks: encroachment and silting of traditional tanks in the south and of village ponds in central India.
Way forward: finish ongoing projects before starting new ones; micro-irrigation; metered and rationed farm power; crop choices matched to water; participatory irrigation management through water users’ associations; tank and pond revival; watershed treatment of rain-fed uplands.
Chhattisgarh angle: low irrigation on the plateau and hills, heavy dependence on monsoon paddy, and the need for protective irrigation through ponds, solar pumps and watershed work.
Memory Tricks
Highest T, Longest H
Tehri is Tallest (260.5 m, Bhagirathi). Hirakud is the Horizontal giant, longest (about 25.8 km, Mahanadi). Bhakra is Behind Tehri, second-highest (Sutlej).
Sources: 'Ground beats Canal beats Tank'
Groundwater (about three-fifths) > Canals (about a quarter) > Tanks (a few per cent, mostly in the south).
CCA: 2 and 10
Minor < 2,000 ha < Medium < 10,000 ha < Major.
Don’t Confuse
| This | vs | That |
|---|---|---|
| Tehri: highest dam (Bhagirathi, Uttarakhand) | vs | Hirakud: longest dam (Mahanadi, Odisha) |
| Bhakra: Sutlej, Himachal Pradesh | vs | Nangal: Sutlej, Punjab, downstream of Bhakra |
| Indira Gandhi Canal: takes off at Harike barrage (Punjab) | vs | Its command area is in Rajasthan |
| DVC: Damodar, 1948, modelled on TVA | vs | Hirakud: Mahanadi, Odisha |
| AIBP (1996-97): finish big projects | vs | PMKSY (2015): umbrella for all irrigation, including Har Khet Ko Pani |
| Atal Bhujal (2019): groundwater, seven states | vs | Jal Jeevan Mission (2019): tap water to rural households, not farm irrigation |
Common Mistakes
Trap 1: Canals are the main source of irrigation
That was true in the early decades after independence. Today tube wells and wells irrigate the largest share of net irrigated area, about three-fifths, far ahead of canals.
Trap 2: Bhakra is the highest dam in India
Bhakra (about 226 m) is the second-highest. Tehri (260.5 m) is the highest.
Trap 3: Tank irrigation is a north Indian system
Tanks dominate in the peninsula (Tamil Nadu, Karnataka, Telangana, Andhra Pradesh), where hard rock limits groundwater. The northern plains depend on tube wells and canals.
Practice
All questions below are original practice questions written in CGPSC style. They are not previous-year questions.
Level 1: Foundation
- The two mottos of PMKSY are “” and “”.
- An irrigation project with a culturable command area of 5,000 ha is classified as ________.
- The Indira Gandhi Canal draws water from the ________ barrage at the confluence of the ________ and ________.
Answers
- Har Khet Ko Pani; Per Drop More Crop.
- Medium (2,000–10,000 ha).
- Harike; Sutlej; Beas.
Level 2: Prelims MCQs
Q1. Consider the following statements:
- Tube wells and other wells together irrigate a larger share of India’s net irrigated area than canals.
- Tank irrigation is most important in the Indo-Gangetic plain.
- A project with a culturable command area of more than 10,000 hectares is classified as a major irrigation project.
Which of the statements given above is/are correct?
- (a) 1 only
- (b) 1 and 3 only
- (c) 2 and 3 only
- (d) 1, 2 and 3
Answer and explanation
(b) 1 and 3 only. Groundwater (tube wells and wells) is the largest source, about three-fifths of net irrigated area. Tanks are important in the peninsula, not the Indo-Gangetic plain, so statement 2 is wrong. Statement 3 states the standard CCA threshold for a major project.
Q2. Match List I (project) with List II (river):
| List I | List II |
|---|---|
| A. Hirakud | 1. Bhagirathi |
| B. Tehri | 2. Krishna |
| C. Nagarjuna Sagar | 3. Mahanadi |
| D. Bhakra | 4. Sutlej |
- (a) A-3, B-1, C-4, D-2
- (b) A-3, B-1, C-2, D-4
- (c) A-1, B-3, C-2, D-4
- (d) A-3, B-2, C-1, D-4
Answer and explanation
(b) A-3, B-1, C-2, D-4. Hirakud is on the Mahanadi (Odisha), Tehri on the Bhagirathi (Uttarakhand), Nagarjuna Sagar on the Krishna (Telangana–Andhra Pradesh) and Bhakra on the Sutlej (Himachal Pradesh).
Q3. The Damodar Valley Corporation, India’s first multipurpose river-valley project after independence, was modelled on:
- (a) The Aswan High Dam of Egypt
- (b) The Tennessee Valley Authority of the USA
- (c) The Three Gorges project of China
- (d) The Snowy Mountains scheme of Australia
Answer and explanation
(b) The Tennessee Valley Authority. DVC was set up in 1948 on the TVA model to control floods on the Damodar (the “Sorrow of Bengal”) and provide irrigation and power to Jharkhand and West Bengal.
Q4. Atal Bhujal Yojana, launched in December 2019, is mainly concerned with:
- (a) Linking Himalayan and peninsular rivers
- (b) Piped drinking water to every rural household
- (c) Community-led sustainable management of groundwater in selected water-stressed states
- (d) Completing ongoing major and medium irrigation projects
Answer and explanation
(c). Atal Bhujal Yojana focuses on community participation in groundwater management in seven states. (a) is the river-linking programme, (b) is the Jal Jeevan Mission, and (d) is the AIBP.
Level 3: Mains Answer Writing
Q1. (60 words) Why is tank irrigation more common in peninsular India than in the northern plains?
Model answer outline
- Peninsula: hard crystalline rock, thin soils, little groundwater; rivers are seasonal; undulating land with natural depressions where bunds can store run-off.
- Northern plains: deep alluvium with abundant groundwater, perennial snow-fed rivers, so tube wells and canals are cheaper.
- Hence tanks in Tamil Nadu, Karnataka, Telangana and Andhra Pradesh.
Q2. (150–200 words) “India’s irrigation future lies less in big dams and more in managing groundwater and water demand.” Examine.
Model answer outline
- Intro: Groundwater now irrigates about three-fifths of the net irrigated area, while large projects show a gap between potential created and used.
- Case for demand management:
- Over-extraction in Punjab, Haryana and Rajasthan; free power and rice procurement drive it.
- Micro-irrigation and “Per Drop More Crop” raise water-use efficiency.
- Atal Bhujal: community budgeting of groundwater.
- Tank and pond revival, watershed development for rain-fed areas.
- Role still left for dams and canals: storage for a monsoon climate, flood control, drought-proofing (Indira Gandhi Canal, Sardar Sarovar), completing ongoing projects under AIBP.
- Costs of big dams: displacement, ecology (Ken–Betwa and Panna), inter-state disputes (Mahanadi).
- Chhattisgarh angle: only about a third irrigated; small storages, solar pumps and watershed work suit the plateau better than new large dams.
- Conclusion: finish what is built, then manage demand; supply-side and demand-side measures must go together.
Quick Revision Table
| Fact | Detail |
|---|---|
| Irrigated share | A little over half of net sown area (about 52% in 2022-23 per NITI Aayog) |
| Largest source | Tube wells and wells, about three-fifths |
| Canals | About a quarter; northern plains and east-coast deltas |
| Tanks | Peninsula; small, falling share |
| Project classes (CCA) | Major > 10,000 ha; Medium 2,000–10,000; Minor < 2,000 |
| Highest dam | Tehri, Bhagirathi, 260.5 m |
| Second-highest | Bhakra, Sutlej, about 226 m (Gobind Sagar) |
| Longest dam | Hirakud, Mahanadi, about 25.8 km with dykes |
| DVC | 1948, Damodar, TVA model |
| Indira Gandhi Canal | From Harike barrage (Sutlej–Beas), irrigates Rajasthan |
| AIBP | 1996-97 |
| PMKSY | 1 July 2015; Har Khet Ko Pani, Per Drop More Crop; extended 2021-26 (₹93,068 crore) |
| Atal Bhujal | 25 Dec 2019; seven states |
| River linking | NPP 1980; NWDA 1982; 30 links (14 Himalayan, 16 peninsular); Ken–Betwa first (foundation 25 Dec 2024) |
Key Takeaways
Key Takeaways
- India irrigates a little over half its net sown area; the rest depends on the monsoon.
- Groundwater is the main source, which makes groundwater management the central irrigation challenge.
- Learn the project trio: Tehri highest, Bhakra second, Hirakud longest.
- PMKSY (2015) is the umbrella scheme; Atal Bhujal (2019) targets groundwater; Ken–Betwa is the first river link.
- For Chhattisgarh, the Mahanadi links state irrigation to an inter-state dispute with Odisha.
What’s Next
- Green Revolution: how irrigation plus HYV seeds transformed output
- Irrigation Projects of Chhattisgarh: Gangrel, Hasdeo Bango, Tandula and more
- Drainage System of India: the rivers behind every project
- Environment and Ecology: dams, displacement and ecological costs
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