RAS question
Gambhiri River, which flows through Chittorgarh Fort, is a tributary of which river?
Correct answer: (A) Berach.
The Gambhiri River, which flows near Chittorgarh Fort, is a tributary of the Berach River.
Explanation
Gambhiri is linked to Chittorgarh's drainage, and its immediate tributary relationship is with the Berach River. The Environment Clearance Portal hydrological report describes the Vindhyan sedimentaries of the area as the catchment of the Gambhir River, calls it a tributary of the Berach River, and notes that the Berach flows near the western side of Sawa hill before meeting Gambhiri just north of Chittorgarh Fort near Bherda. Berach also sits within the wider Banas system as a main tributary of the Banas. The direct link matters in Rajasthan drainage geography: Gambhiri directly joins Berach, even though the wider basin connection runs through Banas.
Why the other options are wrong
- (B) Chambal is not the direct river in this Chittorgarh drainage relationship; Gambhiri's direct tributary relationship is with Berach.
- (C) Mahi belongs to the Vagad-region drainage context, while Chittorgarh's Gambhiri drainage is linked with Berach.
- (D) Banas is part of the wider downstream hierarchy because Berach is a main tributary of Banas, but Gambhiri directly joins Berach, not Banas.
Concept
This tests Rajasthan drainage geography, especially direct tributary links rather than broad river-basin association. RAS repeats such questions because forts, districts and local rivers are often tied together in Rajasthan's physical geography.