Peninsular Rivers – Long Answer Questions
Medium Level (Application & Explanation)
Q1. Explain how the Western Ghats act as the main water divide for Peninsular rivers.
Answer:
- The Western Ghats run north to south along the western coast.
- They act like a wall between the coast and the interior plateau.
- Most rivers on the eastern side of the Ghats flow eastwards.
- They move across the plateau and empty into the Bay of Bengal.
- Many short rivers on the western side flow westwards to the Arabian Sea.
- The narrow coastal plains on the west make these rivers short and swift.
- Thus, the Western Ghats decide the direction, length, and nature of many rivers.
Q2. Describe the main features of the Narmada Basin.
Answer:
- The Narmada rises in the Amarkantak hills in Madhya Pradesh.
- It flows westwards through a rift valley formed by faulting.
- Near Jabalpur, it passes through the Marble Rocks in a deep gorge.
- It forms the Dhuadhar Falls, where it drops over steep rocks.
- Its tributaries are short and often join at right angles.
- The basin lies in parts of Madhya Pradesh and Gujarat.
- It creates an estuary at its mouth, not a delta.
Q3. Why is the Godavari called the Dakshin Ganga? Explain with facts.
Answer:
- The Godavari is the largest peninsular river.
- It is about 1,500 km long, which makes it very extensive.
- It rises in the Western Ghats near Nasik, Maharashtra.
- Its basin covers parts of Maharashtra, Madhya Pradesh, Odisha, and Andhra Pradesh.
- It has many tributaries like Purna, Wardha, Pranhita, Manjra, Wainganga, and Penganga.
- It flows eastwards and forms a delta at the Bay of Bengal.
- Due to its size and reach, it is called Dakshin Ganga.
Q4. Compare the Krishna and Kaveri basins in terms of source, length, and importance.
Answer:
- Krishna rises from a spring near Mahabaleshwar. Its length is about 1,400 km.
- Its major tributaries are Tungabhadra, Koyana, Ghatprabha, Musi, and Bhima.
- The Krishna Basin covers parts of Maharashtra, Karnataka, and Andhra Pradesh.
- Kaveri rises in the Brahmagri range of the Western Ghats. Its length is about 760 km.
- It reaches the Bay of Bengal near Cuddalore, forming fertile areas.
- The Shivasamudram Falls on the Kaveri is India’s second largest waterfall.
- The Kaveri supports hydroelectric power for Mysuru, Bengaluru, and Kolar Gold Field.
Q5. Explain the key differences between delta-forming and estuary-forming rivers in Peninsular India.
Answer:
- Delta-forming rivers flow eastwards to the Bay of Bengal.
- Examples: Mahanadi, Godavari, Krishna, and Kaveri.
- They drop silt near the coast and build fertile deltas.
- Estuary-forming rivers flow westwards to the Arabian Sea.
- Examples: Narmada and Tapi.
- They flow through rift valleys and meet the sea in a single wide channel.
- West coast rivers are often shorter due to narrow coastal plains.
High Complexity (Analysis & Scenario-Based)
Q6. A student confuses the Narmada with other east-flowing rivers. Use physical features to correct them.
Answer:
- The Narmada flows westwards, not eastwards.
- It rises in the Amarkantak hills and moves through a rift valley.
- It has Marble Rocks near Jabalpur and the Dhuadhar Falls.
- Its tributaries are short and join at right angles.
- It forms an estuary, unlike the delta of Godavari or Krishna.
- These features make Narmada distinct among Peninsular rivers.
- So, look for the rift valley and westward flow to identify it.
Q7. You are advising farmers near a delta in the Bay of Bengal. How do east-flowing rivers support agriculture?
Answer:
- East-flowing rivers like Mahanadi, Godavari, Krishna, and Kaveri form deltas.
- Deltas have fertile soil due to the silt carried by rivers.
- This helps in growing crops and supports irrigation.
- The wide basins and long courses give steady water in many seasons.
- Farmers can plan canals and fields efficiently around the delta plains.
- They should also protect the river channels from pollution and overuse.
- Proper water management keeps the soil rich and productive.
Q8. A state team is designing a conservation plan for the Narmada. Suggest steps using the given initiative.
Answer:
- Use the Namami Devi Narmade model to guide conservation.
- Focus on clean water, riverbank protection, and awareness.
- Protect the Marble Rocks gorge and Dhuadhar Falls as heritage sites.
- Monitor short tributaries that join at right angles for sediment and waste.
- Work with Madhya Pradesh and Gujarat for basin-wide actions.
- Promote afforestation along the rift valley slopes.
- Share progress using the official portal to involve citizens.
Q9. Explain how the narrow west-coast plains affect the nature of west-flowing rivers.
Answer:
- The coastal plains between the Western Ghats and the Arabian Sea are narrow.
- This makes west-flowing rivers short and often swift.
- Examples include Sabarmati, Mahi, Bharathpuzha, and Periyar.
- Major westward rivers like Narmada and Tapi run in rift valleys.
- They usually form estuaries instead of deltas at their mouths.
- Short length means smaller drainage basins and limited spread.
- This affects navigation, storage, and local irrigation.
Q10. You are given a blank map. How will you logically place the sources and courses of major Peninsular rivers?
Answer:
- Mark the Western Ghats along the western coast as the divide.
- Place Godavari’s source near Nasik in the Western Ghats. Draw it eastwards to the Bay of Bengal.
- Place Krishna’s source near Mahabaleshwar. Mark its eastward course with tributaries.
- Place Kaveri’s source in the Brahmagri range. Show it reaching the Bay of Bengal near Cuddalore.
- Mark Mahanadi from the highlands of Chhattisgarh flowing eastwards.
- Place Narmada from Amarkantak hills and Tapi from Satpura (Betul). Draw both westwards in rift valleys to the Arabian Sea.
- Keep in mind: east = deltas, west = estuaries, and smaller basins in the peninsula.