Mention the advantages of water ways ? name the national water ways?

It is true that waterways offers advantages .The most important is that they ar 1)fuel efficient compare to other modes of transport 2)It can carry more larger quantities of heavy and bulky goods such as coal and timber ,etc3)It provides much more flexible service and can be adjusted for individual requirements. THE NATIONAL WATERWAYS ARE:-NW1,NW2,NW3
THAT'S WHAT I KNOW HOPE IT WILL HELP

There are some NWW of India :

NW 1 - Allahabad- Haldia stretch of Ganga- Bhagirathi- Hoogli River.

NW 2 - Dhubri stretch of Brahmaputra River.

NW 3 - Kozhikode stretch of west coast canal and Champakara canal and Udyogmandal canal