The Indo-Ganga plains include the largest stretch of alluvial plain in the world; the basins of the great rivers, Ganga
and Brahmaputra together with their many tributaries. The plains are about 2,400 km in length and 240 to 320 km wide. They are one of the most densely populated areas on earth. In scale the plains cover a crescent shaped area of over 10,36,000 sq. km – 1610 km long and 161-232 km wide stretching from the Indus delta in the west through the plains of Pakistan and Ganga Plains in northern India
to the Ganga-Brahmaputra delta in Bangladesh.