Dams, Reservoirs & Multipurpose Projects of India
TGPRB Constable / SI · 2-3 direct questions per paper. Master India's river valley projects, national superlative dams (Tehri, Bhakra, Hirakud), river ↔ state alignments, DVC, Dam Safety Act, and Telangana's historical & modern projects.
How TGPRB tests this topic
Cover all six dimensions to master every exam question asked on dams, reservoirs, barrages, and hydro-electric projects.
Predicted 2026 Question Patterns
Primary Format: Match the Following (Dam ↔ River ↔ State, e.g., Matatilla on Betwa, Ukai on Tapi, Mettur on Cauvery, Almatti on Krishna) and Superlative Pairs (Highest: Tehri vs Highest Gravity: Bhakra; Longest: Hirakud). Watch out for Nawab Ali Nawaz Jung contributions in Hyderabad State.
The Visual Architecture
Jawaharlal Nehru famously hailed multipurpose river valley projects as the "Temples of Modern India". Dams in India serve integrated functions: flood control, canal irrigation, hydroelectricity generation, navigation, and municipal water supply.
Master River Basin & Dam Locator Map of India
High-yield spatial alignment: Indus, Ganga, Narmada, Tapi, Mahanadi, Godavari, Krishna, and Cauvery projects
National Superlative Dam Architectures
Highest, Longest, Largest, and Oldest Engineering Landmarks
Tehri Dam (Uttarakhand)
Bhagirathi River · Highest rock-fill earth dam in India.
Bhakra Dam (HP / Punjab)
Sutlej River · Gobind Sagar reservoir · 2nd tallest.
Hirakud Dam (Odisha)
Mahanadi River · Longest composite earthen dam in the world.
Sardar Sarovar (Gujarat)
Narmada River · Terminal reservoir of Narmada Valley Project.
Peninsular & South Indian Landmarks
Nagarjuna Sagar (TG/AP)
Krishna River · World's largest masonry dam with 26 crest gates.
Idukki Dam (Kerala)
Periyar River · Double-curvature thin arch between Kuravan hills.
Mettur Dam (Tamil Nadu)
Cauvery River (1934) · Lifeline of Cauvery Delta agriculture.
Srisailam Dam (AP/TG)
Krishna River gorge · 2nd largest working hydroelectric capacity.
Dams & Basins Hierarchy at a glance
MAJOR DAMS & MULTIPURPOSE PROJECTS OF INDIA |-- 1. INDUS BASIN | |-- Bhakra Dam (Sutlej, HP) -> 226 m highest gravity | Gobind Sagar | |-- Pong Dam (Beas, HP) -> Maharana Pratap Sagar | +-- Salal / Baglihar / Dulhasti (Chenab, J&K) | |-- 2. GANGA BASIN | |-- Tehri Dam (Bhagirathi, UK) -> 260.5 m highest dam in India | |-- Rihand Dam (Rihand/Son, UP) -> Govind Ballabh Pant Sagar (largest volume) | |-- Matatilla & Rajghat (Betwa, UP/MP) | |-- Chambal Cascade (Gandhi Sagar, Rana Pratap, Jawahar Sagar) | +-- Farakka Barrage (Ganga, WB) -> Flushes Kolkata Port | |-- 3. DAMODAR VALLEY (1948 - First Multipurpose Project, TVA model) | +-- Tilaiya, Konar, Maithon, Panchet Dams | |-- 4. CENTRAL & PENINSULAR BASINS | |-- Narmada: Sardar Sarovar (GJ), Indira Sagar (MP) | |-- Tapi: Ukai Dam (Vallabh Sagar) & Kakrapar (GJ) | |-- Mahanadi: Hirakud Dam (OD) -> 25.8 km longest earthen dam | |-- Godavari: Sriram Sagar (SRSP), Kaleshwaram Barrages, Polavaram | |-- Krishna: Almatti (KA), Srisailam (AP/TG), Nagarjuna Sagar (TG/AP) | |-- Cauvery: KRS (KA), Mettur / Stanley (TN), Kallanai (Oldest, 2nd C. CE) | +-- Periyar: Idukki Arch Dam (KL), Mullaperiyar Dam (KL/TN)
Introduction
India ranks third globally in operational large dams (over 5,334 large dams), trailing only China and the United States. Multipurpose river valley projects constitute the backbone of India's agrarian economy, power grid stability, and disaster resilience against droughts and floods.
Why this topic matters for TGPRB
22 verified PYQs across Constable and SI papers. Questions consistently target: matching dams to their rivers and states (e.g., Ukai to Tapi, Matatilla to Betwa, Almatti to Krishna, Salal to Chenab), identifying national superlatives (Tehri vs Bhakra vs Hirakud), and recognizing historical contributions such as Nawab Ali Nawaz Jung Bahadur (Chief Engineer of Hyderabad State) and the Damodar Valley Corporation (DVC).
The Damodar Valley Corporation (DVC), launched in 1948, was the first multipurpose river valley project of independent India, modeled after the Tennessee Valley Authority (TVA) in the United States. In Southern India, irrigation and dam engineering reached monumental heights during both the Kakatiya/Nizam eras (tanks and masonry works) and post-independence river development (Nagarjuna Sagar, Srisailam, Sriram Sagar, and the Kaleshwaram barrage network).
Deep Dive
Master the complete river basin directory of dams, state associations, and historical milestones.
1. Key Superlative Dams & Architectural Types
Tehri Dam (Uttarakhand) · Highest Dam in India
Height: 260.5 m (855 ft)Constructed on the Bhagirathi River in the Garhwal Himalayas near New Tehri. It is an earth-and-rockfill embankment dam with an installed hydroelectric capacity of 2,400 MW (including a 1,000 MW pumped-storage plant). Reservoir name: Swami Ram Tirtha Sagar.
Bhakra-Nangal Project (Himachal Pradesh / Punjab)
Height: 226 m · Highest Straight Gravity DamConstructed across the Sutlej River in Bilaspur, Himachal Pradesh. The reservoir formed by Bhakra Dam is Gobind Sagar (named after Guru Gobind Singh, 3rd largest reservoir in India by volume). Nangal Dam is a subsidiary barrage located 13 km downstream in Punjab to divert water into the Bhakra Canal System.
Hirakud Dam (Odisha) · Longest Dam in the World
Total Length: 25.8 kmBuilt across the Mahanadi River in Sambalpur district, Odisha (1957). The main dam spans 4.8 km between two hills (Laxmi Dungri on left and Chandili Dungri on right), flanked by 21 km of earthen dykes. Tamed the "Sorrow of Odisha" and created Asia's largest artificial lake.
Nagarjuna Sagar Dam (Telangana / Andhra Pradesh)
Height: 124 m · Largest Masonry DamConstructed across the Krishna River straddling Nalgonda (Telangana) and Palnadu/Guntur (AP) districts (1967). Built with stone masonry rather than concrete. Has 26 radial crest gates. Its two major main canals are named Jawahar Canal (Right canal) and Lal Bahadur Canal (Left canal).
2. Basin-Wise Master Directory of Major Dams & Projects
High-yield project ↔ river ↔ state mappings tested in TGPRB questions:
| River Basin | Project / Dam Name | River | State / UT | Key Distinction |
|---|---|---|---|---|
| Indus Basin | Bhakra Dam | Sutlej | Himachal Pradesh | Gobind Sagar reservoir; 226 m high straight gravity |
| Pong Dam (Beas Dam) | Beas | Himachal Pradesh | Maharana Pratap Sagar; Ramsar wetland | |
| Thein Dam (Ranjit Sagar) | Ravi | Punjab / J&K | Ranjit Sagar reservoir on Ravi gorge | |
| Salal, Baglihar, Dulhasti | Chenab | Jammu & Kashmir | Run-of-the-river hydroelectric stations on Chenab | |
| Uri & Kishanganga | Jhelum & Kishanganga | Jammu & Kashmir | Kishanganga is a tributary of Jhelum (Neelum) | |
| Ganga Basin | Tehri Dam | Bhagirathi | Uttarakhand | Highest dam in India (260.5 m) |
| Rihand Dam | Rihand (Son tributary) | Uttar Pradesh (Sonbhadra) | Govind Ballabh Pant Sagar (largest artificial reservoir by volume in India) | |
| Matatilla & Rajghat | Betwa | UP / MP border | Joint multipurpose venture in Bundelkhand | |
| Gandhi Sagar, Rana Pratap, Jawahar Sagar | Chambal | MP & Rajasthan | Chambal Valley project cascade (Gandhi Sagar in MP; others in RJ) | |
| Bansagar Dam | Son | Madhya Pradesh | Joint project of MP, UP, and Bihar on Son river | |
| Farakka Barrage | Ganga | West Bengal (Murshidabad) | Diverts water into Bhagirathi-Hooghly to flush Kolkata Port | |
| Damodar Valley | Tilaiya & Maithon Dams | Barakar (Damodar tributary) | Jharkhand | Under Damodar Valley Corporation (DVC - 1948) |
| Panchet & Konar Dams | Damodar & Konar | Jharkhand | DVC multipurpose flood control & thermal power network | |
| Central West-Flowing | Sardar Sarovar Dam | Narmada | Gujarat (Navagam) | Key terminal dam; feeds Narmada Main Canal |
| Indira Sagar Dam | Narmada | Madhya Pradesh (Khandwa) | Largest water storage capacity in India (12.22 billion m³) | |
| Ukai Dam & Kakrapar | Tapi | Gujarat (Surat / Tapi) | Ukai reservoir also known as Vallabh Sagar | |
| Godavari Basin | Sriram Sagar Project (SRSP) | Godavari | Telangana (Nizamabad) | Pochampadu project; lifeline of North Telangana |
| Kaleshwaram Barrages | Godavari | Telangana (Jayashankar Bhupalpally) | Medigadda (Lakshmi), Annaram (Saraswati), Sundilla (Parvati) | |
| Polavaram Project | Godavari | Andhra Pradesh (Eluru) | National Project under AP Reorganisation Act 2014 | |
| Krishna Basin | Almatti Dam (Lal Bahadur Shastri) | Krishna | Karnataka (Bagalkot) | Upper Krishna Project reservoir |
| Srisailam Dam | Krishna | AP (Nandyal) / Telangana | Deep gorge dam; major hydro power generating station | |
| Nagarjuna Sagar Dam | Krishna | Telangana / AP | World's largest masonry dam; Jawahar & Lal Bahadur canals | |
| Tungabhadra Dam | Tungabhadra | Karnataka (Hosapete) | Pampa Sagar reservoir; joint project with AP/Telangana | |
| Cauvery Basin | Krishna Raja Sagara (KRS) | Cauvery | Karnataka (Mandya) | Designed by Sir M. Visvesvaraya; hosts Brindavan Gardens |
| Mettur Dam (Stanley Reservoir) | Cauvery | Tamil Nadu (Salem) | Built in 1934 across Cauvery gorge in Tamil Nadu | |
| Kallanai (Grand Anicut) | Cauvery | Tamil Nadu (Thanjavur) | Built by King Karikala Chola (2nd century CE); oldest surviving water-diversion structure in India | |
| Kerala & West Coast | Idukki Dam | Periyar | Kerala (Idukki) | Double-curvature concrete arch dam between Kuravan & Kurathi hills |
| Mullaperiyar Dam | Periyar | Kerala (operated by Tamil Nadu) | Built in 1895 by John Pennycuick; subject of inter-state dispute |
3. Telangana Water Architecture: Nawab Ali Nawaz Jung to Kaleshwaram
Nawab Ali Nawaz Jung Bahadur (1877-1949)
Chief Engineer of Hyderabad State under the 7th Nizam Mir Osman Ali Khan. Designed monumental irrigation works: Nizam Sagar Dam on Manjeera River (1931), Osmansagar (Gandipet) and Himayatsagar reservoirs on Musi & Esi rivers for Hyderabad flood protection, and the Rajoli Banda Diversion Scheme (RDS) on Tungabhadra River.
Kaleshwaram Lift Barrage Network
Constructed at the confluence of Godavari and Pranahita rivers. Consists of 3 major barrages: Medigadda (Lakshmi) Barrage, Annaram (Saraswati) Barrage, and Sundilla (Parvati) Barrage. Water is lifted through massive underground surge pools to reservoirs including Mid Manair, Lower Manair, Kondapochamma Sagar, and Mallanna Sagar.
Data & Comparisons
Consolidated comparison of India's major dam records and inter-state river project disputes:
Dam Superlatives of India: Master Examination Matrix
| Superlative Category | Dam Name | River | State | Key Metric |
|---|---|---|---|---|
| Highest Dam in India | Tehri Dam | Bhagirathi | Uttarakhand | 260.5 metres |
| Highest Straight Gravity Dam | Bhakra Dam | Sutlej | Himachal Pradesh | 226 metres |
| Longest Earthen Dam | Hirakud Dam | Mahanadi | Odisha | 25.8 km total length |
| Largest Water Storage Reservoir | Indira Sagar Dam | Narmada | Madhya Pradesh | 12.22 billion m³ |
| Largest Artificial Lake / Reservoir | Govind Ballabh Pant Sagar | Rihand (Son tributary) | Uttar Pradesh | 10.6 billion m³ |
| Largest Masonry Dam | Nagarjuna Sagar Dam | Krishna | Telangana / AP | 124 m height · 26 gates |
| Only Arch Dam in India | Idukki Dam | Periyar | Kerala | 168.9 m height |
| Oldest Surviving Dam in India | Kallanai (Grand Anicut) | Cauvery | Tamil Nadu | Built 2nd Century CE |
| First Multipurpose Project (Independent India) | Damodar Valley Corp (DVC) | Damodar | WB / Jharkhand | Established 1948 (TVA model) |
Major Inter-State River & Dam Disputes
| Project / River | Involved States | Core Point of Contention |
|---|---|---|
| Mullaperiyar Dam | Kerala vs Tamil Nadu | Dam located in Kerala, operated by Tamil Nadu. Dispute over water level (142 ft vs 152 ft) and structural safety of the 1895 masonry dam. |
| Almatti Dam Height | Karnataka vs AP & Telangana | Height raising from 519.6 m to 524.256 m impacts Krishna water inflows to Srisailam and Nagarjuna Sagar downstream. |
| Mekedatu Balancing Reservoir | Karnataka vs Tamil Nadu | Proposed dam on Cauvery River at Mekedatu; Tamil Nadu argues it will obstruct designated water quota under the CWDT award. |
| Babli Barrage | Maharashtra vs Telangana (AP) | Constructed across Godavari in Maharashtra near Telangana border; Supreme Court allowed 2.74 TMC storage with gates lifted during monsoon. |
Memory Hacks
Direct recall shortcuts and negative marking traps tested in TGPRB exams:
Trap 1: Highest Dam (Tehri) vs Highest Straight Gravity Dam (Bhakra)
• Tehri Dam (260.5 m): Highest dam in India overall (rockfill structure on Bhagirathi in Uttarakhand).
• Bhakra Dam (226 m): Highest straight gravity concrete dam in India (on Sutlej in Himachal Pradesh).
Trap 2: Almatti vs Mettur (Krishna vs Cauvery)
• Almatti Dam: Located on the Krishna River in Karnataka (Lal Bahadur Shastri Reservoir).
• Mettur Dam: Located on the Cauvery River in Tamil Nadu (Stanley Reservoir).
Trap 3: Rihand Dam (Govind Ballabh Pant) vs Bhakra (Gobind Sagar)
• Gobind Sagar: Reservoir of Bhakra Dam on Sutlej in Himachal Pradesh.
• Govind Ballabh Pant Sagar: Reservoir of Rihand Dam on Rihand (Son tributary) in Uttar Pradesh (Largest artificial reservoir by volume).
PYQs
Every question below appeared in an official TSLPRB Constable or SI paper. Click an option to test your understanding.
Matatilla Project was built on which of the following rivers?
Ukai dam is situated across which of the following rivers?
Match the following List - I Project a) Rihind b) Sileru c) Mettur d) Almatti List - II State i) Karnataka ii) Tamilnadu iii) Andhra Pradesh iv) Uttar Pradesh
Name the Chief Engineer who designed many projects in Hyderabad State in 20th Century?
On which river is the 'Rajoli Banda Diversion Scheme' built ?
Which one of the following pairs related to hydro-electricity projects and rivers is not correct?
Identify the name of the Governor who inaugurated the Kaleshwaram project in Telangana ?
Match the following List - I a) Sardar Sarovar dam b) Highest mountain peak in South India c) Todas d) Copper List - II i) Anaimudi ii) Agnigundala iii) Narmada iv) Nilgiri
Match the following: List-I (a) Narmada bachao andolan (b) Chipko movement (c) Biodiversity concept (d) Vanajeevi List - II (i) Sunderlal Bahuguna (ii) Daripally Ramaiah (iii) Medha Patkar (iv) Edward O Wilson (v) Michael Greenstone Choose the correct answer/pairs :
Bhakra-Nangal project is constructed on the river
Advanced Practice
TGPSC-Style Advanced Practice
These questions use multi-statement, 4x4 matching, and basin cross-linking formats from recent TGPSC Group-I patterns. TGPRB papers (2022-2023) remain 92-93.5% direct factual MCQs. These drills harden your project-river recall.
Source: Forensic Paper-Setting Evolution Audit, Aug 2026 - 1,350 questions classified across 7 papers.
Match the following lift irrigation projects/barrage with the rivers: List I (Project/Barrage): A. Mahatma Gandhi Kalwakurthy Lift Irrigation Project B. Nizam Sagar Project C. J. Chokka Rao Devadula Lift Irrigation Scheme D. Chanaka-Korata Barrage List II (River): I. Godavari II. Krishna III. Penganga IV. Manjeera Choose the correct answer:
Consider the following statements regarding Telangana irrigation projects: A. Koulasnala and Boggulavagu irrigation projects are located in the Godavari basin. B. Kotepally Vagu and Asif Nahar irrigation projects are located in the Krishna basin. Which of the above statements is/are correct?
Match the following major dams of India with their river and structural type: List I (Dam): A. Tehri Dam B. Bhakra Dam C. Hirakud Dam D. Sardar Sarovar Dam List II (River & Superlative): I. Sutlej River (Highest Gravity Dam, 226 m) II. Mahanadi River (Longest Earthen Dam, 25.8 km) III. Bhagirathi River (Highest Rock-fill Dam, 260.5 m) IV. Narmada River (Major Concrete Gravity Dam)
Consider the following statements regarding the Damodar Valley Corporation (DVC): A. It was established in 1948 as the first multipurpose river valley project of independent India. B. It was modeled on the Tennessee Valley Authority (TVA) of the USA. C. Tilaiya, Maithon, and Panchet dams are key storage dams constructed under the DVC system. D. The DVC project exclusively benefits only the state of Bihar. Which of the above statements are correct?
Which of the following statements regarding historical irrigation works of Hyderabad State under Chief Engineer Nawab Ali Nawaz Jung are correct? A. Nizam Sagar Dam was constructed across the Manjeera River in Kamareddy district. B. Osman Sagar and Himayat Sagar were built on Musi and Esi rivers to protect Hyderabad from floods following the 1908 deluge. C. The Ali Sagar Lift Irrigation scheme in Nizamabad was named in honor of Nawab Ali Nawaz Jung. D. Kaddam Project was constructed across the Kaddam River, a left-bank tributary of Godavari. Choose the correct answer:
Comprehension Gate
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