ENVIRONMENT GEOGRAPHY TERMS-3

PRERNA FOR IAS

         Mehnat Aapki, Guidance Humari

         Roz ki Prelims Practice — Experts ke Saath

ENVIRONMENT GEOGRAPHY TERMS-3

1. Reforestation

Reforestation is the process of planting trees in areas where forests previously existed but were destroyed due to deforestation, forest fires, mining, or other human activities. It aims to restore degraded ecosystems, improve biodiversity, conserve soil and water, and increase carbon absorption. Reforestation helps reduce climate change by removing carbon dioxide from the atmosphere. It also provides habitat for wildlife, improves rainfall patterns, and supports local livelihoods through sustainable forest products. Governments and environmental organizations promote reforestation through community participation, afforestation programmes, and sustainable forest management. Successful reforestation requires native tree species and long-term ecological planning.

2. Desertification

Desertification is the process by which fertile land gradually becomes dry, barren, and desert-like due to natural factors and human activities. Causes include deforestation, overgrazing, excessive cultivation, poor irrigation, climate change, and prolonged drought. Desertification reduces soil fertility, agricultural productivity, water availability, and biodiversity. It also threatens food security and livelihoods, especially in arid and semi-arid regions. Preventive measures include afforestation, sustainable farming, rainwater harvesting, controlled grazing, soil conservation, and efficient irrigation techniques. Combating desertification is essential for achieving sustainable land management and protecting ecosystems from long-term environmental degradation.

3. Land Degradation

Land degradation refers to the decline in the quality, productivity, and ecological health of land due to natural processes or human activities. It may result from soil erosion, deforestation, mining, urbanization, overgrazing, pollution, salinization, and unsustainable agricultural practices. Degraded land loses its ability to support vegetation, wildlife, and agricultural production. It also contributes to biodiversity loss, reduced water infiltration, and increased flood risk. Land restoration measures include afforestation, soil conservation, sustainable agriculture, watershed management, and controlled land use. Preventing land degradation is essential for food security, environmental sustainability, and economic development.

4. Soil Erosion

Soil erosion is the removal of the fertile top layer of soil by natural agents such as water, wind, glaciers, and gravity, or by human activities like deforestation and improper farming. Topsoil contains essential nutrients required for plant growth, making its loss harmful to agriculture. Soil erosion reduces crop productivity, causes sedimentation in rivers and reservoirs, and increases the risk of floods and landslides. Conservation measures include contour farming, terracing, afforestation, shelterbelts, strip cropping, and controlled grazing. Protecting soil is vital for sustainable agriculture, biodiversity, and maintaining healthy ecosystems.

5. Salinization

Salinization is the accumulation of soluble salts in the soil, reducing its fertility and agricultural productivity. It commonly occurs in arid and semi-arid regions due to excessive irrigation, poor drainage, high evaporation, and the use of saline groundwater. High salt concentrations make it difficult for plants to absorb water, resulting in poor crop growth and lower yields. Salinization also affects soil structure and microbial activity. Prevention measures include proper drainage systems, efficient irrigation techniques, crop rotation, use of salt-tolerant crops, and periodic flushing of salts. Sustainable water management is essential to prevent soil salinity.

6. Watershed