Question

The only perennial river of Rajasthan is ____________.
A. Sambar.
B. Luni.
C. Chambal.
D. Sabarmati

Answer 1

Hint: A perennial river channel has a constant flow of water throughout the year. The catchment area of the only perennial river of the Indian state Rajasthan is 1,32,508 square kilometres.

Complete answer: Option A - The Sambhar river is the largest inland salt lake of India which is situated 80 kilometres away from Jaipur and 64 kilometres away from Ajmer in Rajasthan. It is a non-perennial river which receives its water from river rivers, namely, Khandela, Khari, Roopangarh, Mantha, Samood and Medha.
Option B - The Luni river or the Lavanavari river is considered to be the largest river flowing through the Thar Desert located in Rajasthan. This river is a non-perennial river and originates near Ajmer in the Pushkar valley of the Aravalli range.
Option C - The Chambal river originates in the highlands of the Janapav Hills situated in the Vindhya Range and flows through the Malwa plateau. The total length of the river is 1050 kilometres and is a perennial river which is mostly fed by its tributaries. It is considered to be one of the cleanest perennial rivers of India.
Option D - Sabarmati river originates in Rajasthan’s Udaipur district in the Aravalli range. It is a non-perennial river and is one of the major west-flowing rivers of India. The flow of this river is dominated by the monsoon with little or no flow after the monsoon.

Thus, the correct answer is option (C).

Note: Himalayan river water flows throughout the year in these rivers, so they are perennial in nature. These rivers get water both from the rainstorm and snowmelt. The Peninsular streams get water only from precipitation and water streams in these rivers only during the rainy season. In this way, these streams are occasional or non-perennial in nature.