Physical characteristics of the Eastern Ghats within Odisha's territory.
The Eastern Ghats form the physiographic backbone of Odisha, covering nearly three-fourths of the state's total area. Unlike the continuous Western Ghats, the Eastern Ghats in Odisha are a highly dissected and broken chain of mountains and plateaus that run parallel to the East Coast.
1. Topography and Elevation
The region is characterized by rugged terrain, deep valleys, and high-altitude plateaus. The elevation generally increases from the north-east towards the south-west.
- Highest Peaks: The South-Western part contains the highest elevations. Deomali (1,672 m) in Koraput is the highest peak, followed by Turia Konda and Mahendragiri (1,501 m).
- Dissected Nature: Major rivers like the Mahanadi, Brahmani, and Baitarani have cut through these mountains, creating wide gorges (like Satkosia) and broad intermontane valleys.
2. Geological Composition
The Eastern Ghats are among the oldest geological formations in India, belonging to the Pre-Cambrian era. The rocks are primarily metamorphic in nature.
- Rock Types: The mountains are composed of Khondalites (named after the Khond tribe), Charnockites, and Granite Gneisses.
- Mineral Wealth: This geological setup makes the region a powerhouse of minerals. It contains massive deposits of Bauxite (in the Panchpatmali and Gandhamardan hills), Iron Ore, and Manganese.
3. Soil and Vegetation
The physical environment of the Ghats dictates the ecology and agriculture of the highlands.
- Soil: The dominant soil types are Red and Laterite soils. These soils are porous and acidic, which are suitable for plantation crops like coffee and rubber in the higher reaches.
- Forest Cover: The Ghats are covered with Tropical Moist Deciduous and Semi-Evergreen forests. They host biodiversity hotspots like Similipal and Sunabeda.
4. Climatic Influence
The Eastern Ghats act as a climatic barrier for the state:
- Orographic Barrier: They obstruct the South-West Monsoon winds, causing heavy orographic rainfall on the windward slopes of Koraput and Kandhamal.
- Temperature Variations: The high elevation provides a sub-temperate climate in places like Daringbadi, creating a sharp contrast with the hot coastal plains.
Conclusion
In conclusion, the Eastern Ghats in Odisha are a complex geographical entity that defines the state's drainage, climate, and industrial potential. Their ancient geology and rugged relief provide both challenges for connectivity and opportunities for mineral-based development. Protecting this fragile ecosystem from soil erosion and deforestation is vital for the environmental stability of Odisha.