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🌏 Geography of Bihar Chapter 2: Physical Divisions of Bihar (भौतिक विभाग)

Module 1: Physical divisions and the Siwalik region

📖 Chapter 2 of 17 🧩 Module 1 of 6 ⏱️ ~2 min read 💡 6 MCQs
Topic Part 1 of 2

Concept

Subtopic 1.1: Physical divisions and the Siwalik region

  • By relief Bihar has 3 divisions: Himalayan mountainous region (586 sq km, 0.06%), Ganga plain (90,650 sq km, 96.26%) and southern plateau (2,927 sq km, 3.68%).
  • By physical structure: (1) Siwalik hills and Terai in the north, (2) the vast plain, (3) the southern marginal plateau.
  • The Siwalik hills lie in the north-west (West Champaran and Purnia), cover about 932 sq km, and are the third fold of the Himalaya built by Tertiary movements. They are mainly sedimentary rocks.
  • It has three sub-divisions. Ramnagar Dun: low hills over 214 sq km, maximum height 240 m, south of the Harha river valley.
  • Someshwar range: from the head of the Triveni canal to Bhikhnathori, about 75 km. Its crest forms the Bihar–Nepal border and its highest peak is 874 m. Passes: Sumeshwar, Bhikhnathori, Mawat, which carry the routes to Nepal.
  • Dun valley: lies between the two ranges, is also the valley of the Harha river, about 24 km long and somewhat higher than the Ganga plain.
⭐ Key Points
  • The plain is by far the largest division.
  • 586 + 90,650 + 2,927 = 94,163 sq km, the state total.
  • Siwalik region is about 932 sq km, regarded as the third fold of the Himalaya.
  • 874 m; the range runs along the Bihar–Nepal boundary.
  • It is a series of small hills over 214 sq km, up to 240 m.
  • The Harha river valley lies between Ramnagar Dun and Someshwar range.
📌 One-line Q&A
  • Question: Ganga plain's area and share by relief classification: Answer: 90,650 sq km; 96.26%.
  • Question: The southern plateau region covers: Answer: 2,927 sq km; 3.68%.
  • Question: The Siwalik region of Bihar covers about: Answer: 932 sq km.
  • Question: Highest peak of the Someshwar range is: Answer: 874 m.
  • Question: Ramnagar Dun has a maximum height of: Answer: 240 m.
  • Question: The Dun valley is also called the valley of the: Answer: Harha river.
Topic
Questions

MCQs

Answer this question, then use Next.

Question 1: Ganga plain's area and share by relief classification:

The plain is by far the largest division.

Question 2: The southern plateau region covers:

586 + 90,650 + 2,927 = 94,163 sq km, the state total.

Question 3: The Siwalik region of Bihar covers about:

Siwalik region is about 932 sq km, regarded as the third fold of the Himalaya.

Question 4: Highest peak of the Someshwar range is:

874 m; the range runs along the Bihar–Nepal boundary.

Question 5: Ramnagar Dun has a maximum height of:

It is a series of small hills over 214 sq km, up to 240 m.

Question 6: The Dun valley is also called the valley of the:

The Harha river valley lies between Ramnagar Dun and Someshwar range.
Question 1 of 6

One-liners

Write your answer, then submit to see the correct answer.

Ganga plain's area and share by relief classification:

90,650 sq km; 96.26%.

The southern plateau region covers:

2,927 sq km; 3.68%.

The Siwalik region of Bihar covers about:

932 sq km.

Highest peak of the Someshwar range is:

874 m.

Ramnagar Dun has a maximum height of:

240 m.

The Dun valley is also called the valley of the:

Harha river.
Question 1 of 6