(1) Ganga Explanation: India has about 14,500 km of navigable waterways, which consists of the Ganges-Bhagirathi-Hooghly rivers, the Brahmaputra, the Barak river, the rivers in Goa. the backwaters in Kerala, inland waters in Mumbai and the deltaic regions of the Godavari - Krishna rivers. National Waterway-1: Allahabad-Haldia stretch of the GangesBhagirathi-Hooghly river of total length 1620 km was declared as National Waterway-1 (NW1) in the year 1986.