Desertification and Aeolian Sediment Transport in India.

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Presentation transcript:

Desertification and Aeolian Sediment Transport in India

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

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

Causes of Desertification

The Himalayan Water Grab

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

Observer

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

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

Heavily decreased sediment loads

Erosion/deposition equilibrium Aggrading environment Decreased flow “Hungry water” High erosion rate

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