Explain the physical features of the South-Western Hilly Region.

The South-Western Hilly Region is the most rugged and elevated part of Odisha's physiography. It forms a significant portion of the Eastern Ghats and acts as a climatic barrier for the state. This region primarily covers districts like Koraput, Rayagada, Malkangiri, Gajapati, and Kandhamal.

1. High Elevation and Mountain Peaks

This region is characterized by high-altitude plateaus and towering peaks. It contains the highest points in the state, which are essential for orographic rainfall.

  • Deomali Peak: Located in Koraput, it is the highest peak of Odisha (1,672 meters).
  • Mahendragiri: Situated in Gajapati district (1,501 meters), it is famous for its rich biodiversity and medicinal plants.
  • General Relief: The average elevation of this region varies between 600 to 1,200 meters above mean sea level.

2. Dissected Plateaus and Rugged Topography

The topography is not a continuous range but a series of dissected plateaus separated by deep river valleys.

  • Jeypore-Nabarangpur Plateau: A vast highland area that supports significant tribal populations and diverse agriculture.
  • Deep Gorges: Rivers like the Machhkund and Vansadhara have carved out deep gorges and valleys, creating a highly undulating terrain.

3. Geological Composition

The rocks of this region are among the oldest in the world, belonging to the Pre-Cambrian era. The primary rock types include:

  • Khondalites and Charnockites: These metamorphic rocks give the hills their characteristic look and are often rich in Bauxite deposits.
  • Soil Type: The hills are mostly covered with Red and Laterite soils, which are acidic and have low fertility but are suitable for plantation crops.

4. Climate and Drainage

  • Climate: Due to high elevation, regions like Daringbadi (Kandhamal) experience a sub-temperate climate, often referred to as the "Kashmir of Odisha."
  • River Sources: Many important rivers like the Rushikulya, Vansadhara, Nagavali, and Indravati originate from these hill systems.

Conclusion

In conclusion, the South-Western Hilly Region is the geographic spine of Southern Odisha. Its rugged peaks, ancient rocks, and unique climate not only determine the ecological health of the state but also provide the mineral wealth and water resources necessary for development. Balancing tribal livelihoods with the conservation of this fragile mountain ecosystem is vital for the state's future.