Understanding Desertification and Aeolian Sediment Transport in India

Climates in India, particularly in the desert areas like Rajasthan, are heavily influenced by the monsoon season, with 32% of the land facing the threat of desertification. The upward eddie wind currents in the region can lift silt and very fine sand up to 4km. Various factors contribute to desertification, including the Himalayan Water Grab and complexities in sediment load dynamics. The Gangetic river system annually delivers 2,390 tons/km2 of sediment, while tropical river systems are influenced by both climate and anthropogenic activities. These regions have seen a heavy decrease in sediment loads, impacting the erosion/deposition equilibrium.

• India
• Climates
• Desertification
• Sediment Transport
• Monsoon

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1. Desertification and Aeolian Sediment Transport in India

2. Climates of India -Area of Rajasthan is predominantly desert or an arid climate. -Climate is heavily influenced by monsoon season. -32% of land facing threat of desertification

3. -Upward eddie wind currents of greater than 3km/h can lift silt and very fine sand up to 4km

4. Causes of Desertification

9. The Himalayan Water Grab

10. The Source Half world s population dependent Historical land and border disputes Dynamic and evolving systems o Hydrologically and o Politically Seasonal fluctuations and vulnerabilities

11. Observer

12. Complexities of Sediment Load Limited Knowledge Climatic evolution Anthropogenic effects Intrabasin and regional variability Source/sink dynamics

13. Gangetic river system 2,390tons/km2annually Sediment delivery influenced primarily by climatic conditions Tropical river system 216tons/km2annually Sediment delivery influenced by climate and anthropogenic factors

14. Heavily decreased sediment loads

15. Erosion/deposition equilibrium High erosion rate Decreased flow Aggrading environment Hungry water

16. Decreasing sediment loads Subsidence from oil extraction Rising sea level Decreasing deltaic aggradation