- Luni River also known as the Salt River (Lonari or Lavanavari in Sanskrit) is named so because its water is brackish below Balotra.
- Its source lies to the west of Ajmer in the Aravalli range, Rajasthan.
- It is the only river basin of any significance in Western Rajasthan, which forms the bulk of the arid zone.
- The river is known as the Sagarmati in its upper course and from Govindgarh, where Sarsuti joins it, becomes Luni.
- It is one of the west-flowing rivers of India, like Narmada and Tapti.
- It finally flows into the Rann of Kachchh and it gets lost in the marsh.
- The peculiarity of this river is that it tends to increase its width rather than deepen the bed because the banks are of soils, which are easily erodible whereas beds are of sand.
- The floods develop and disappear so rapidly that they have no time to scour the bed.