The rivers of Inland Drainage Basin consists of those in Western Rajasthan which are are few and they disappear within a year due to scanty rainfall. Most of them are of an ephemeral character. They drain towards the individual basins or salt lakes like the Sambhar or are lost in the sands having no outlet to the sea. The Luni is the only rivers of this category that drains into the Rann of Kuchch.