Water Resources
Dams, Irrigation, River Linking, Water Management - Complete Explanation with Maps
Learning Content
💧 Indian Water Resources - Introduction!
🗺️ India - Water resources
📊 Indian Water Resources Statistics
| Total water resources | 4000 billion cubic meters (BCM) |
| usable water | 1123 BCM (28%) |
| Ground water | 433 BCM |
| surface water | 690 BCM |
| Agricultural use | 80% |
🏗️ Major Dams of India!
🗺️ India - Major Dams Map
📊 Major dams - MASTER TABLE
| dam | Six | State | Special |
|---|---|---|---|
| Bagra Nangal | Sutlej | Punjab/HP | 🏆 Highest Dam (226m) |
| Tehri | Bhagirathi | Uttarakhand | India's highest (260m) |
| Heerakoot | Mahanadi | Odisha | 🏆 Longest dam (26 km) |
| Nagarjuna Sagar | Krishna | Telangana | Stone Dam |
| Mettur | Cauvery | Tamil Nadu | Built in 1934 |
| Sardar Sarovar | Narmada | Gujarat | More savings |
| Mullaipriyar | Periyar | Kerala | TN-Kerala problem |
🌾 Irrigation methods!
💧 Irrigation Systems - Comparison
📊 Irrigation Systems - Comparison Table
| method | Area % | Advantage | problem |
|---|---|---|---|
| Well/tube well | 39% | Self control | Ground water is low |
| Canal | 24% | Large area | Water is wasted |
| Lake | 3% | Rainwater harvesting | Small area |
| Drip irrigation | Modernity | 90% water saving | High cost |
| Spray | Modernity | Uniform distribution | Wind damage |
🏆 State wise Irrigation
| Canal is more | Uttar Pradesh, Punjab |
| Well more | Rajasthan, Maharashtra, Gujarat |
| The lake is high | Tamil Nadu, Andhra Pradesh |
🚀 TNPSC Shortcuts & Memorization Formulas!
🏗️ Dam Achievements - "TBH NMS"
| Tehri | 🏆 High dam | 260 m | Bhagirathi |
| Bhakra | 2nd tallest | 226 m | Sutlej |
| HIraq | 🏆 Long dam | 26 km | Mahanadi |
Reminder:"Tehri Bakra Height, Hirakud Length"
💧 Irrigation System % - "Well 40, Canal 25, Tank 3"
Well = 39%(≈40) >Canal = 24%(≈25) >Lake = 3%
Reminder:"WCT - 40-25-3" (Well-Canal-Tank)
🌊 River-Dam Linkage
| Sutlej | → | Bagra Nangal |
| Bhagirathi | → | Tehri |
| Mahanadi | → | Heerakoot |
| Narmada | → | Sardar Sarovar |
| Cauvery | → | Mettur |
| Krishna | → | Nagarjuna Sagar |
❓ TNPSC Main Q&A
1. Highest dam in India?
✅ Tehri Dam (260 m) - Bhagirathi - Uttarakhand
2. India's longest dam?
✅ Heerakoot Dam (26 km) - Mahanadi - Odisha
3. Major dam in Tamil Nadu?
✅ Mettur Dam (1934) - Cauvery
4. Which method covers the most area in irrigation?
✅ Well/Tube Well (39%)
5. Which state has more lake irrigation?
✅ Tamil Nadu
6. Which state uses the most ground water?
✅ Punjab, Haryana
7. How much water does drip irrigation save?
✅ Up to 90%
8. In which river is Bagra Nangal?
Sutlej river
📊 Quick Reference - Multipurpose River Valley Projects
| Damodar | First Project - DVC (1948) |
| Bagra Nangal | Punjab, Haryana, Rajasthan |
| Heerakoot | Odisha - Flood Control |
| Nagarjuna Sagar | Andhra, Telangana |
General Studies
All Parts
General Science
Nature of matter, physics, mechanics, electricity, magnetism...
Current events
Collection of Recent Events, National Symbols – Details of S...
Geography
Topography – Natural Formations – Monsoon, Rainfall, Weather...
History and Culture of India
Indus Valley Civilization – Guptas, Delhi Sultans, Mughals a...
Constitution of India
Constitution of India – Preamble to Constitution – Main Obje...
Indian Economy
Nature of Indian Economy – Five Year Plans – A Maturity – Pl...
Indian National Movement
National Revival, Indian National Congress, BR Ambedkar, Bha...
History, Culture, Tradition and Socio-Political Movements of Tamil Nadu
Tamil Community History, Thirukkural, Various Reformers, Ref...
Development Administration in Tamil Nadu
Social justice and social harmony, education and welfare sys...
Competence and mental intelligence
Compression – Percent – Greater Common Factor – Greater Co...