Land Degradation — Revision Notes
⚡ 30-Second Revision
<ul><li>Land degradation: decline in productive capacity of land.</li><li>Key types: Soil erosion (water/wind), salinization, waterlogging, chemical, physical.</li><li>Causes: Deforestation, overgrazing, unsustainable agriculture, industrial pollution.
</li><li>India: ~29.32% degraded land (ISRO 2016-17).</li><li>Legal: Art 48A, 51A(g), EPA 1986, NGT Act 2010.</li><li>International: UNCCD (LDN), SDG 15.3, Bonn Challenge (India: 26 Mha by 2030).</li><li>Mnemonic: <strong>R</strong>ehabilitate, <strong>E</strong>ducate, <strong>S</strong>ustain, <strong>T</strong>echnology, <strong>O</strong>rganize, <strong>R</strong>egulate, <strong>E</strong>mpower.
2-Minute Revision
Land degradation is the reduction in the land's capacity to provide ecosystem services, driven by both natural and anthropogenic factors. Major types include soil erosion (wind/water), salinization, waterlogging, chemical contamination, and physical degradation.
In India, nearly 30% of land is degraded, primarily by water erosion. This has severe consequences for food security, water availability, biodiversity, and climate change. India's legal framework, including constitutional articles (48A, 51A(g)) and acts (EPA 1986, NGT 2010), provides a basis for action.
Internationally, India is committed to the UNCCD's Land Degradation Neutrality (LDN) goal and the Bonn Challenge, aiming to restore 26 million hectares by 2030. Mitigation strategies are crucial and can be remembered by the RESTORE mnemonic: <strong>R</strong>ehabilitate degraded lands, <strong>E</strong>ducate communities, promote <strong>S</strong>ustainable land management, leverage <strong>T</strong>echnology, <strong>O</strong>rganize integrated efforts, <strong>R</strong>egulate harmful practices, and <strong>E</strong>mpower local stakeholders.
A holistic, integrated approach is essential for sustainable land management.
5-Minute Revision
Land degradation signifies a critical decline in the land's productive capacity, impacting its ability to support life and provide essential ecosystem services. It's a global challenge, with India facing significant pressure, reporting around 29.
32% of its geographical area as degraded (ISRO 2016-17), predominantly due to water erosion. The problem is multifaceted, encompassing: 1) <strong>Soil Erosion</strong> (wind/water, e.g., Chambal ravines, Thar Desert); 2) <strong>Salinization</strong> (salt accumulation, e.
g., Punjab's irrigated plains); 3) <strong>Waterlogging</strong> (excess water, e.g., parts of Ganga-Yamuna basin); 4) <strong>Chemical Degradation</strong> (pollution by pesticides, industrial waste, e.
g., Kolar district, industrial belts); and 5) <strong>Physical Degradation</strong> (compaction, crusting, mining, e.g., Jharia coalfields). Key causes include deforestation, overgrazing, unsustainable agricultural practices, industrialization, and climate change.
The consequences are far-reaching: reduced agricultural productivity, food insecurity, biodiversity loss, water scarcity, increased climate vulnerability, and socio-economic distress leading to migration.
India's constitutional provisions (Articles 48A, 51A(g)) and legal instruments (Environment Protection Act 1986, NGT Act 2010) form the bedrock for combating degradation. Internationally, India is a key player in the UNCCD, committed to achieving Land Degradation Neutrality (LDN) and pledged to restore 26 million hectares under the Bonn Challenge by 2030.
Effective mitigation requires a comprehensive strategy, which can be recalled using the RESTORE mnemonic: <strong>R</strong>ehabilitate degraded lands through afforestation and reclamation; <strong>E</strong>ducate stakeholders on sustainable practices; promote <strong>S</strong>ustainable land management (agroforestry, conservation agriculture); utilize <strong>T</strong>echnology for monitoring and precision farming; <strong>O</strong>rganize integrated watershed development programs; <strong>R</strong>egulate polluting activities and enforce environmental laws; and <strong>E</strong>mpower local communities for participatory resource management.
This integrated approach is vital for achieving sustainable development goals.
Prelims Revision Notes
<strong>Definition & Types:</strong> Land degradation is the decline in land productivity. Key types: Soil Erosion (water/wind), Salinization, Waterlogging, Chemical Degradation (pollution, nutrient depletion), Physical Degradation (compaction, crusting, mining).
Distinguish Land Degradation from Desertification (subset in drylands).<br><strong>Causes:</strong> Anthropogenic (deforestation, overgrazing, unsustainable agriculture, industrial pollution, urbanization) and Natural (droughts, floods, wind/water erosion).
<br><strong>Statistics (ISRO 2016-17):</strong> ~29.32% of India's land degraded. Water erosion (10.98%) dominant. Rajasthan, Maharashtra, Gujarat, Karnataka, Ladakh are highly affected.<br><strong>Legal Framework:</strong><br> - <strong>Art 48A:</strong> State's duty to protect environment.
<br> - <strong>Art 51A(g):</strong> Citizen's duty to protect environment.<br> - <strong>Environment (Protection) Act, 1986:</strong> Umbrella legislation for environmental protection.<br> - <strong>National Green Tribunal Act, 2010:</strong> Specialized body for environmental justice.
<br><strong>International Frameworks:</strong><br> - <strong>UNCCD:</strong> United Nations Convention to Combat Desertification. Focus on drylands. Key concept: Land Degradation Neutrality (LDN) – balance degradation with restoration.
<br> - <strong>SDG 15.3:</strong> Target to combat desertification, restore degraded land, achieve LDN by 2030.<br> - <strong>Bonn Challenge:</strong> Global effort to restore 350 Mha by 2030. India pledged 26 Mha.
<br> - <strong>UNFCCC Linkage:</strong> Land degradation contributes to climate change; restoration aids mitigation/adaptation.<br><strong>Government Schemes:</strong> PMKSY-Watershed Development Component, National Afforestation Programme (NAP), Green India Mission, Soil Health Card Scheme.
<br><strong>Mitigation (RESTORE Mnemonic):</strong> <strong>R</strong>ehabilitate, <strong>E</strong>ducate, <strong>S</strong>ustain, <strong>T</strong>echnology, <strong>O</strong>rganize, <strong>R</strong>egulate, <strong>E</strong>mpower.
Mains Revision Notes
<strong>Introduction:</strong> Define land degradation, its scale in India, and its multi-dimensional impact (environment, economy, society). State its interlinkages with food security, climate change, and poverty.
<br><strong>Causes & Consequences:</strong> Structure by natural vs. anthropogenic causes. Detail consequences on agriculture (yields, input costs, food security), environment (biodiversity loss, water scarcity, climate change), and society (migration, poverty, regional disparity).
Use specific Indian examples and statistics.<br><strong>Mitigation Strategies:</strong><br> - <strong>Policy & Legal:</strong> Discuss constitutional provisions (48A, 51A(g)), EPA 1986, NGT Act 2010. Evaluate effectiveness, enforcement challenges.
<br> - <strong>Government Schemes:</strong> Analyze PMKSY-WDC, NAP, Green India Mission, Soil Health Card. Highlight successes and implementation gaps (e.g., convergence, funding).<br> - <strong>International Commitments:</strong> Detail India's role in UNCCD (LDN), Bonn Challenge.
Discuss challenges in achieving LDN by 2030 (land tenure, monitoring, finance).<br> - <strong>Sustainable Land Management (SLM):</strong> Agroforestry, conservation agriculture, organic farming, watershed management, contour bunding, terracing.
<br> - <strong>Technological Solutions:</strong> Remote sensing, GIS for monitoring; precision agriculture; bioremediation, phytoremediation.<br> - <strong>Community Participation:</strong> Emphasize bottom-up approaches, traditional knowledge, Joint Forest Management, watershed committees.
<br><strong>Vyyuha Analysis - Hidden Economics:</strong> Discuss economic multipliers, rural livelihood impacts, migration, regional disparity. Use data-driven projections to highlight the economic imperative of restoration.
<br><strong>Interlinkages:</strong> Explicitly connect land degradation with climate change (carbon cycle), food security (yields, farmer income), water scarcity (watershed health), biodiversity loss (habitat destruction), and poverty/migration.
<br><strong>Conclusion:</strong> Advocate for a holistic, integrated, multi-stakeholder approach, emphasizing nature-based solutions and adaptive management to build resilience and achieve sustainable development goals.
Vyyuha Quick Recall
<strong>RESTORE</strong> <strong>R</strong>ehabilitate degraded lands <strong>E</strong>ducate communities and stakeholders <strong>S</strong>ustain through sustainable land management practices <strong>T</strong>echnology for monitoring and intervention <strong>O</strong>rganize integrated watershed development <strong>R</strong>egulate harmful practices and enforce laws <strong>E</strong>mpower local communities and institutions