“Soil erosion is the most serious but least dramatic of exogenic hazards in India.” Analyse its causes, consequences, and remedies.

Soil forms at roughly 1 cm in several hundred years but can be stripped in a single monsoon. About 29% of India's geographical area is degraded, and soil erosion is the single largest contributor, yet it attracts none of the attention given to cyclones or earthquakes because it is gradual and diffuse.

Causes

• Natural drivers: High-intensity monsoon rainfall, steep Himalayan and Western Ghat slopes, and friable alluvial and black soils.
• Deforestation and overgrazing: Removal of canopy and root binding exposes bare soil to raindrop impact.
• Faulty cultivation: Ploughing up and down the slope, shifting cultivation in the Northeast, and monocropping without cover.
• Wind erosion: Prevalent in Rajasthan and adjoining arid tracts.
• Riverbank and coastal erosion: Aggravated by sand mining and by dams that trap sediment.

Consequences

• Falling productivity: Loss of the fertile A-horizon and of nitrogen, phosphorus and potassium raises fertiliser dependence.
• Ravine and gully formation: Over 3.7 million hectares of ravines in the Chambal, Yamuna and Mahi basins are effectively lost to farming.
• Reservoir siltation: Storage capacity and hydropower output decline.
• Downstream flooding: A raised riverbed reduces channel capacity.
• Desertification and distress migration: Land degradation feeds rural out-migration.

Remedies

• Agronomic measures: Contour ploughing, strip cropping, mulching, cover crops and crop rotation.
• Mechanical measures: Terracing, check dams, gully plugging and contour bunding.
• Biological measures: Afforestation, shelterbelts in arid zones and grassland regeneration.
• Programmatic support: Watershed development under PMKSY, the National Mission for Sustainable Agriculture, Soil Health Cards and compensatory afforestation.
• Restoration targets: India's commitment to restore 26 million hectares of degraded land by 2030 under the UNCCD framework.

Erosion is undramatic precisely because it is continuous. Treating it as a slow-onset disaster, with watershed-scale planning rather than plot-scale fixes, is the only response proportionate to its scale.