HPAS 2010 Prelims Question 64

HPAS Prelims Question & Notes

On the basin of which river is Dodra Kawar situated?

  • (A) Pabbar
  • (B) Tons
  • (C) Yamuna
  • (D) Giri
Show Answer & Explanation

Correct Answer: (B)

Explanation:

Dodra Kawar is situated in the catchment area of the Tons River. Specifically, it lies in the Rupin Valley. The Rupin River flows through this region and later joins the Supin River to form the Tons River.

[Image of Tons river basin map]

📚 Additional Info: Dodra Kawar & Tons River

1. Geography of Dodra Kawar

  • Location: It is a remote, landlocked region in the Shimla district.
  • Access: It is separated from the Rohru subdivision by the high Chanshal Pass (4,520 meters).
  • Villages: Dodra and Kwar are two separate villages situated on opposite sides of the Rupin River.

2. The Tons River System

  • Significance: The Tons is the largest tributary of the Yamuna. In fact, it carries more water than the Yamuna itself when they meet near Kalsi (Dehradun).
  • Formation: It is formed by the confluence of two streams:
    • Rupin: Rises in Himachal Pradesh (Dodra Kawar area).
    • Supin: Rises in Uttarakhand.
  • Meeting Point: They meet at a place called Naitwar (in Uttarakhand) to form the Tons.

3. Confusion Alert: Pabbar vs. Tons

  • Pabbar River: Also in Shimla district (Rohru Valley), but it flows on the other side of the Chanshal Pass. It rises from Chandranahan Lake and joins the Tons later at Tiuni.
  • Key Distinction: Rohru is in the Pabbar basin; Dodra Kawar is in the Tons (Rupin) basin.

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