Abstract
As the formation of dune lake is accidental, its existence is very rare in the world. Its formation necessitates to fulfil following five conditions; (1) free development of sand dunes on the off-shorebar without natural or artificial obstacles, (2) the effectiveness of prevailing wind along the direction of valley, (3) the formation of the definite barin between two duneranges, (4) the catchment area and (5) the height of sand dunes.
