The Thar Desert is located on the leeward side of Aravalis and receives very little rainfall, ranging from 100 to 150 mm per year. The desert consists of an undulating sandy plain and rocky outcrops. It occupies much of western Rajasthan. It has an arid climate with very low vegetation cover. Streams appear during rainy season and disappear soon after. ‘Luni’ is the only river in this area. These internal drainage rivers fill into the lakes and do not reach the sea.
The southern part of the peninsular plateau is bordered by narrow coastal strips along the Arabian Sea on the west and the Bay of Bengal on the east. The western coast starts from the Rann of Kutch and ends at Kanyakumari. It is narrower than the east coast. This plain is uneven and broken by hilly terrain. It can be divided into three parts:
