In the Indian economic planning framework, irrigation projects are categorized based on their Culturable Command Area (CCA). Major Irrigation Projects are defined as those having a CCA of more than 10,000 hectares. These typically involve large-scale infrastructure such as massive dams, expansive canal networks, and multi-purpose river valley systems that integrate irrigation with hydropower generation, flood control, and drinking water supply.
Classification and Evolution
The classification of irrigation schemes was standardized by the Planning Commission (now NITI Aayog) to streamline resource allocation and management.
| Category | Culturable Command Area (CCA) | Primary Technical Features |
| Major Irrigation | > 10,000 Hectares | Large dams, barrages, and main canal systems. |
| Medium Irrigation | 2,000 to 10,000 Hectares | Smaller distributaries and secondary canal networks. |
| Minor Irrigation | < 2,000 Hectares | Groundwater (tubewells), tanks, and lift irrigation. |
Key Multi-Purpose and Major Irrigation Projects
Multi-purpose projects are the “Temples of Modern India” (as termed by Jawaharlal Nehru) that serve the dual objective of agricultural water supply and industrial/domestic utility.
Northern and Western India
- Bhakra-Nangal Project (Sutlej River): India’s largest multi-purpose project. The Bhakra Dam (Himachal Pradesh) is one of the highest gravity dams in the world. It benefits Punjab, Haryana, and Rajasthan.
- Indira Gandhi Canal (Harike Barrage): One of the largest canal systems in the world, stretching over 649 km. It has transformed the arid landscape of the Thar Desert in Rajasthan into a productive agricultural zone.
- Sardar Sarovar Project (Narmada River): A massive gravity dam in Gujarat that provides irrigation and drinking water to drought-prone areas of Gujarat and Rajasthan, while generating significant hydropower for Madhya Pradesh and Maharashtra.
- Beas Project (Beas River): Consists of the Pandoh Dam and Pong Dam, primarily designed to harness the Beas waters for irrigation in Punjab, Haryana, and Rajasthan under the Indus Waters Treaty.
Eastern and Central India
- Hirakud Dam (Mahanadi River): Located in Odisha, it is the longest earthen dam in the world. It provides crucial irrigation to the Mahanadi delta and controls seasonal flooding.
- Damodar Valley Project (Damodar River): Modeled after the Tennessee Valley Authority (USA), it was India’s first multi-purpose project (1948) aimed at flood control and irrigation in Jharkhand and West Bengal.
- Kosi Project (Kosi River): An international venture between India and Nepal to tame the “Sorrow of Bihar,” providing irrigation to over 8 lakh hectares.
Southern India
- Nagarjuna Sagar Project (Krishna River): One of the largest masonry dams, located in Andhra Pradesh/Telangana. It has one of the world’s largest network of canals.
- Tungabhadra Project (Tungabhadra River): A joint venture between Karnataka and Andhra Pradesh, providing vital irrigation to the Rayalaseema region.
- Kaleshwaram Lift Irrigation Project (Godavari River): One of the world’s largest multi-stage lift irrigation projects located in Telangana, designed to irrigate nearly 18 lakh acres across 13 districts.
National Perspective Plan: Interlinking of Rivers (ILR)
The National Water Development Agency (NWDA) has identified 30 links to transfer water from surplus basins to deficit basins.
Himalayan Component (14 Links)
- Focuses on the Brahmaputra and Ganga basins.
- Aims to construct storage reservoirs on the main rivers and their tributaries in India and Nepal to conserve monsoon flows.
Peninsular Component (16 Links)
- Includes links such as Mahanadi-Godavari-Krishna-Pennar-Cauvery.
- Ken-Betwa Link Project: The first project under the ILR to reach the implementation stage. It aims to transfer surplus water from the Ken river (MP) to the Betwa river (UP) to irrigate the drought-prone Bundelkhand region.
Modern Governance and Safety Frameworks
Pradhan Mantri Krishi Sinchayee Yojana (PMKSY)
The Accelerated Irrigation Benefit Programme (AIBP) is a core component of PMKSY, specifically designed to provide central assistance for the timely completion of major and medium irrigation projects that were stalled due to financial constraints.
Dam Rehabilitation and Improvement Project (DRIP)
With financial assistance from the World Bank and AIIB, DRIP (Phase II and III) is currently being implemented to:
- Improve the safety and operational performance of over 700 existing dams.
- Strengthen the institutional setup for dam safety through the Dam Safety Act, 2021.
Challenges in Major Irrigation Projects
- IPC-IPU Gap: A significant lag exists between “Irrigation Potential Created” (infrastructure built) and “Irrigation Potential Utilized” (actual water reaching the farm) due to incomplete field channels and siltation.
- Environmental and Social Impact: Large-scale displacement of local populations and loss of forest cover remain critical bottlenecks.
- Inter-State Disputes: Water being a State subject (Entry 17, List II), conflicts over water sharing (e.g., Cauvery, Krishna, Vamsadhara) often lead to prolonged legal battles and project delays.
Important Facts and Trivia for Prelims
- Highest Gravity Dam: Bhakra Dam (226 m).
- Longest Dam: Hirakud Dam (main section 4.8 km; total 25.8 km).
- First Multi-purpose Project: Damodar Valley Corporation (DVC).
- National Project Status: Projects like the Polavaram Project (Godavari) and Lakhwar Project (Yamuna) receive 90% central funding due to their strategic national importance.
- Pattiseema Lift Irrigation: Credited with being the first project in India to complete a major river interlinking (Godavari to Krishna) in record time.