Types of Droughts

1. Meteorological Drought: Occurs when rainfall is significantly below normal levels (typically 75% or less of the long-term average).
2. Agricultural Drought: Arises when soil moisture drops below levels required to sustain healthy crop growth during critical seasons.
3. Hydrological Drought: Characterized by water reserves in lakes, reservoirs, rivers, and groundwater aquifers falling below average.
4. Socio-Economic Drought: Occurs when water and food shortages negatively impact supply and demand chains across economic goods.

Causes of Droughts in India

• Monsoon Failure: Heavy reliance on the southwest monsoon means delays or total failures trigger widespread drought.
• Climatic Variability: Atmospheric fluctuations such as El Niño severely disrupt regional rainfall distribution.
• Deforestation: Reduces local transpiration, increases surface runoff, and impedes groundwater recharge.
• Overexploitation of Water Resources: Excessive withdrawal of surface and groundwater depletes natural reserves, exacerbating dry periods.
• Soil Degradation: Unsustainable farming practices diminish soil moisture retention capacity.

Drought-Prone Areas in India

Approximately 68% of India's net sown area is vulnerable to drought conditions. Highly affected zones include:

• Western Rajasthan
• Gujarat
• Telangana
• Maharashtra (Marathwada and Vidarbha)
• Karnataka (North Interior Region)
• Parts of Madhya Pradesh and Chhattisgarh

Impact of Droughts

1. Agricultural Loss: Crop failures threaten farmer livelihoods and national food security.
2. Water Scarcity: Severe reduction in drinking water, irrigation supplies, and industrial water availability.
3. Migration: Distress migration of rural populations to urban centers in search of manual labor.
4. Livestock Loss: Fodder and water shortages compromise cattle health and dairy productivity.
5. Economic Impact: Lowers national and regional GDP growth, particularly in agrarian-dependent states.
6. Environmental Degradation: Loss of vegetative cover, soil erosion, and accelerating desertification.

Measures to Mitigate Droughts

Short-term Measures

• Water Tankers and Wells: Emergency drinking water distribution in crisis zones.
• Crop Insurance: Schemes like Pradhan Mantri Fasal Bima Yojana (PMFBY) providing financial safety nets.
• Relief Employment: MGNREGA guaranteeing wage employment during acute agricultural downturns.

Long-term Measures

• Rainwater Harvesting: Enhancing artificial and natural groundwater recharge.
• Drought-Resistant Crops: Promoting millets and low water-intensive varieties.
• Watershed Management: Comprehensive conservation within natural drainage basins.
• Efficient Irrigation: Expanding drip and sprinkler micro-irrigation systems.
• Afforestation: Restoring soil moisture and stabilizing regional microclimates.

Key Government Initiatives

• NADAMS: National Agricultural Drought Assessment and Monitoring System utilizing satellite imagery.
• IWMP: Integrated Watershed Management Programme targeting rain-fed terrain.
• NMSA: National Mission for Sustainable Agriculture promoting climate-resilient farming models.