What is the annual average rainfall in the Indian Desert?

Correct option is D

Correct Answer: (d) Less than 150 mm

Explanation:

• The Indian Desert (Thar Desert) receives very low annual rainfall, generally below 150 mm.
• This is due to the absence of mountains to block monsoon winds and the dominance of dry continental air.
• Extreme aridity and sparse vegetation result from this low rainfall.

Information Booster (Important Facts about Indian Desert):

• The Indian Desert lies mainly in western Rajasthan.
• Major rivers: Luni (ephemeral); most streams disappear before reaching the sea.
• Vegetation: Thorn, scrub, xerophytic plants.
• Climate: Hot and dry, with large diurnal temperature variation.
• Famous features: Barchans (crescent dunes) and longitudinal dunes.

Additional Knowledge:

• More than 1000 mm: Typical of Western Ghats and northeastern states, not deserts.
• 500 mm to 1000 mm: Found in semi-arid and sub-humid regions, not the Thar Desert core.
• 200 mm to 500 mm: Represents semi-desert margins, but the Indian Desert’s core receives <150 mm.