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Irrigation System in India – A Key Pillar of Agriculture

  • May 4, 2025
  • Posted by: Beauty Kumari
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India’s irrigation system plays a vital role in its agriculture, helping to reduce dependence on unpredictable monsoons and ensuring steady food production and rural development. This article discusses its various aspects—geographical features, importance, environmental and social effects, challenges, and possible solutions.

What is Irrigation?

Irrigation refers to the controlled supply of water to crops using artificial means like canals, wells, tanks, or tube wells, especially when rainfall is insufficient.

Although India has the largest irrigated farmland globally, it still faces water scarcity. To address this, the country must adopt water-saving irrigation techniques to ensure healthy crop growth without wasting water.

In India, about two-thirds of farmland depends on irrigation because monsoon rainfall is often irregular, unreliable, and unevenly spread across regions.

Geographical Conditions Supporting Irrigation

Northern Plains

  • Flat land helps water flow through canals.
  • Soft soil makes it easy to build wells and canals.
  • Subsoil acts as a water reservoir, making groundwater easily accessible.

Peninsular Plateau

  • Hard rocks and uneven terrain make canal construction difficult.
  • Tank irrigation is common here due to the rocky landscape.

Why is Irrigation Necessary in Indian Agriculture?

  1. Uneven Rainfall – Some regions like Punjab and Haryana get less rain, while others like Meghalaya get excessive rainfall.
  2. Limited Rainfall Coverage – Only about 30% of cultivated land gets adequate rainfall; irrigation boosts productivity in all regions.
  3. Monsoon Gaps – Dry spells between rains can harm crops.
  4. Seasonal Rain – 75% of rain falls in just 3–4 months, making irrigation vital during dry periods.
  5. Heavy Rainfall Runoff – Rapid rainwater runoff prevents soil from absorbing enough moisture.
  6. Water-Intensive Crops – Crops like rice and sugarcane need extra water, even in rainy areas.
  7. End Monoculture – Irrigation helps diversify cropping patterns.
  8. Green Revolution Needs – High-yielding seeds and fertilisers require regular water.
  9. Growing Population – More people means more food demand, which requires reliable irrigation.
  10. Plant Growth – Moisture helps in transporting nutrients to plants.

Impact of Irrigation

  • Positive Impacts: Boosts crop yields, expands farming areas, and reduces dependence on monsoons.
  • Helps Farmers: Provides security against drought and improves livelihoods.

Environmental Effects

  • Salinisation and Waterlogging: Excess water leads to salt buildup in soil, harming crops.
  • Alkalisation: Sodium accumulation in soil is hard to reverse.
  • Health Risks: Irrigation may spread diseases like malaria and degrade water quality due to agrochemicals.

Social and Economic Effects

  • Displacement from Dams: Building large dams often displaces communities without proper compensation.
  • Migration and Social Disruption: Relocation leads to loss of infrastructure and can cause malnutrition or unrest.

Major Challenges

  1. High Cost of Micro Irrigation – Expensive for small farmers. NGOs like IDE are helping with affordable solutions.
  2. Delayed Projects – Many projects are unfinished due to poor planning.
  3. Interstate Water Disputes – River water sharing causes conflicts among states.
  4. Regional Imbalance – Northeastern India lags behind in irrigation development.
  5. Waterlogging and Salinity – Poor management causes salt formation on farmlands.
  6. Rising Costs – Irrigation expenses have grown over time.
  7. Falling Water Tables – Excessive groundwater use lowers underground water levels.
  8. Energy Problems – Frequent power cuts affect irrigation. Solar-powered systems like those under PM-KUSUM can help.

Solutions and Alternatives

  • Build irrigation systems in areas with minimal environmental damage.
  • Improve existing projects instead of starting new ones.
  • Promote small, farmer-owned irrigation setups.
  • Use sprinkler and drip irrigation to conserve water.
  • Reuse treated wastewater.
  • Maintain downstream flood flows for fishing and ecology.

Key Irrigation Schemes in India

1. Pradhan Mantri Krishi Sinchai Yojana (PMKSY)

  • Launched in 2015.
  • Goal: “Per Drop More Crop” and “Har Khet Ko Pani” (Irrigation for Every Field).
  • Components:
    • AIBP (Accelerated Benefits) – Ministry of Jal Shakti.
    • Har Khet Ko Pani – Minor irrigation and water restoration.
    • Per Drop More Crop – Micro irrigation efforts.
    • Watershed Development – Soil and water conservation.

2. Mission Kakatiya (Telangana)

  • Focuses on restoring minor irrigation sources like tanks and ponds.
  • Aims to effectively use water from Krishna and Godavari river basins for farming.

Conclusion

Efficient irrigation is crucial for India’s agriculture and rural economy. By adopting sustainable irrigation techniques and addressing regional challenges, India can ensure food security, better farmer incomes, and long-term agricultural growth.