Water Resources of Rajasthan
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Despite being predominantly arid, Rajasthan has a complex water resource system — including major rivers, dams, the Indira Gandhi Canal, groundwater reserves, and traditional taanka and nadi systems. The state faces severe water stress, with per capita water availability well below the national average.
Key Facts for RPSC RAS:
- Rajasthan receives approximately 1% of India’s total annual river flow despite having 10.4% of India’s area.
- The Indira Gandhi Canal (649 km long) is India’s largest canal project and brings water from the Beas River (Punjab) to western Rajasthan.
- Groundwater is the primary source of irrigation for ~60% of Rajasthan’s cultivated area.
- Per capita water availability in Rajasthan has fallen from over 2,000 cubic metres in 1950 to under 600 cubic metres today — categorising Rajasthan as a “water stressed” state.
- Traditional water conservation structures: Taanka, Johad, Nadi, Baori, and Cheenas are important community water systems.
⚡ Exam tip: The Indira Gandhi Canal — its source, route, stages, benefits, and environmental concerns — and the groundwater crisis in Rajasthan are frequently asked.
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Major Water Resources
1. Rivers and Their Utilisation
Rajasthan’s rivers are primarily seasonal — flowing vigorously during monsoon and reducing to trickles or drying up in summer. The major rivers are:
Chambal River:
- The most reliable and longest river system in Rajasthan
- Supports irrigation through the Kota Barrage and Bhim Sagar (Jawahar Sagar) Dam
- The Chambal project benefits Kota, Bundi, and Bharatpur districts
- The Ganga Canal (not in Rajasthan) is connected to the Chambal through the Chambal-Ganga link proposals
Luni River:
- The lifeline of Marwar — flows through Ajmer, Pali, Jodhpur, Barmer
- Has been dammed at Jawai (Jawai Dam, near Balotra) for irrigation
- Suffers from increasing salinity as it flows west
Banas River:
- Originating from the Aravallis near Kumbhalgarh
- Major tributary of Chambal — joins at Tetehri in Sawai Madhopur
- Supports irrigation through Bisalpur Dam (Tonk) — the main source of drinking water for Jaipur city
- Bisalpur-Jaipur Water Supply Project: One of India’s largest urban water supply projects — supplies ~145 crore litres per day to Jaipur
Mahi River:
- Flows from Madhya Pradesh into Rajasthan (Banswara)
- The Mahi Dam (Banswara) provides irrigation and hydroelectric power
2. Major Dams and Reservoirs
| Dam | River | District | Purpose |
|---|---|---|---|
| Bisalpur Dam | Banas | Tonk | Drinking water (Jaipur), irrigation |
| Jawahar Sagar | Chambal | Kota | Hydropower, irrigation |
| Ranapratap Sagar | Chambal | Chittorgarh | Irrigation, power |
| Kota Barrage | Chambal | Kota | Irrigation |
| Mahi Dam | Mahi | Banswara | Irrigation, power |
| Jawai Dam | Jawai (Luni tributary) | Barmer/Pali | Irrigation |
| Kalisindh Dam | Kalisindh | Jhalawar | Irrigation |
3. The Indira Gandhi Canal — Lifeline of Western Rajasthan
The Indira Gandhi Canal is the most significant water resource project in Rajasthan:
History:
- Conceived in 1947 by Lieutenant General K.M. Panickar (then Chief Engineer)
- Renamed after Indira Gandhi in 1985
- India’s largest canal system
Technical Details:
- Source: Pong Dam reservoir on the Beas River in Himachal Pradesh (Beas Project Stage 1)
- Length: 649 km in Rajasthan (total system including Punjab/Haryana sections is longer)
- Capacity: Carries approximately 40,000 cusecs of water at its head
- Coverage: Intended to irrigate 1.5 million hectares of land in Bikaner, Jaisalmer, Barmer, Jodhpur, Nagaur, and Churu districts
Stages:
- Stage I: From Harike (Punjab-Haryana border) to Pugal Road (Rajasthan border) — 167 km
- Stage II: From Pugal Road to Mohangarh (western Rajasthan) — 482 km
Benefits:
- Has transformed lakebeds and sand dunes into agricultural fields
- Supports cultivation of wheat, cotton, mustard, and pulses in the Thar Desert
- Has increased groundwater recharge in the surrounding area
- Has supported afforestation and greening of the desert margins
- Has provided drinking water to desert towns and villages
Concerns and Criticisms:
- Waterlogging — rising water tables have caused salinity problems in some areas
- Soil salinity — canal irrigation without proper drainage has increased salt accumulation
- Environmental disruption — changes in desert ecology and biodiversity
- Displacement — some local communities lost land to canal construction
- Unequal distribution — benefits have not been equally distributed (large farmers benefit more)
4. Groundwater Resources
Groundwater is the primary water source for most of Rajasthan:
Aquifer Types:
- Alluvial aquifers — in the eastern plains (Chambal, Banas basins) — relatively high yields
- Aravalli hard rock aquifers — fractured granite/gneiss — moderate to low yields
- Desert sand aquifers — deep alluvial and dune aquifers — generally low yield but some high-yield zones
Groundwater Crisis:
- Over-extraction — excessive tube well drilling has lowered water tables dramatically
- Indiscriminate drilling — private bore wells have caused a “race to the bottom” in aquifer levels
- Contamination — fluoride contamination is widespread in eastern Rajasthan (Bhilwara, Ajmer, Tonk); arsenic contamination in some areas
- Seawater intrusion — not an issue in Rajasthan, but saline water intrusion from deeper aquifers is a problem in coastal-influenced areas
Status: Rajasthan is classified as a “water stressed” state by the Central Water Commission. Per capita water availability has declined sharply.
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Comprehensive coverage for students on a longer study timeline.
Water Management and Conservation
Traditional Water Conservation Systems
Rajasthan has developed sophisticated traditional water harvesting systems over centuries:
Johad (जोहड़):
- Small earthen check dams built across seasonal streams
- Collect monsoon runoff and recharge groundwater
- Found throughout the Aravalli region — particularly in Alwar, Bharatpur, and Mewat
- Mohammed Yunus’s work in Alwar: The Tarun Bharat Sangh organisation, led by Rajendra Singh, revived hundreds of johads in the Alwar district, dramatically increasing groundwater levels and reforestation
Taanka (टांका):
- A traditional cylindrical underground storage tank
- Collects roof-top rainwater during monsoon
- Found in the Thar Desert region — particularly in Jaisalmer, Barmer, Bikaner
- Still the primary source of drinking water in many remote desert villages
Nadi (नदी):
- Village ponds — natural or artificially created depressions
- Collect and store monsoon water for drinking water for humans and animals
- Common in all districts — vary in size from small village nadis to large regional reservoirs
Baori/ bawdi (बावड़ी):
- Stepwells — underground water storage structures with stairs descending to the water level
- Found throughout Rajasthan — a combination of water storage and social space
- Chand Baori (Abhaneri, Jaipur) — one of the world’s deepest and most beautiful stepwells, with 3,500 steps descending 13 storeys
Cheena (चीना):
- Sub-surface dams built in sandy riverbeds
- Traps water flowing underground — allows water to accumulate upstream
- Used in the Luni basin
Water Governance in Rajasthan
The Rajasthan Water Policy:
- Recognises water as a public trust
- Emphasises community participation in water management
- Promotes rainwater harvesting and groundwater recharge
Groundwater laws:
- Rajasthan has some of India’s earliest groundwater regulation laws
- The Rajasthan Groundwater (Control and Regulation) Act, 1986 — attempts to regulate bore well drilling
- However, enforcement remains challenging
The Water Table Crisis
The Numbers:
- Groundwater extraction in Rajasthan’s canal command areas: 80-100% of replenishable resources
- In some areas of Bikaner, Ganganagar, and Jodhpur: extraction exceeds 100% — overdrafting
- Water table in some tube well areas has dropped by 5-10 metres over the past two decades
Fluoride Crisis:
- Fluoride contamination affects approximately 15 districts in eastern Rajasthan
- Fluoride in drinking water above 1.5 mg/L causes fluorosis (bone and teeth damage)
- Rajasthan has some of India’s highest rates of dental and skeletal fluorosis
- Affected districts: Bharatpur, Dholpur, Karauli, Sawai Madhopur, Kota, Jhalawar
Inter-State Water Disputes
Rajasthan has significant water sharing agreements and disputes:
Indira Gandhi Canal and Punjab:
- Water sharing between Punjab, Haryana, and Rajasthan from the Beas system has been a long-standing dispute
- The Punjab Preservation of Underground Water Act, 2008 — Rajasthan alleged this was designed to limit water flow to Rajasthan
Narmada River:
- Rajasthan receives a share of Narmada water through the Narmada Project — water is transferred to Banaskantha (Gujarat) area, with some benefits to Rajasthan border districts
Ganga Canal Extension proposals:
- There have been proposals to extend the Ganga Canal to Rajasthan — this would involve linking the Ganga to the Chambal to the Yamuna, and then to Rajasthan
Practice Questions for RPSC RAS
- Why is Rajasthan called a “water-scarce” state? What are the major indicators of water stress?
- Describe the Indira Gandhi Canal — its source, route, benefits, and environmental concerns.
- What traditional water conservation systems exist in Rajasthan? Give examples of each.
- How has the Bisalpur-Jaipur water supply project addressed Jaipur’s drinking water needs?
- What are the causes and consequences of groundwater depletion in Rajasthan?
Common Mistakes to Avoid
- Thinking the Indira Gandhi Canal flows from the Ganga — it flows from the Beas River in Himachal Pradesh (Punjab).
- Confusing the Indira Gandhi Canal with the Rajasthan Canal — they are the same project; the name was changed.
- Underestimating the scale of traditional water systems — johads, taankas, and nadis are sophisticated and still functional.
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