How many national waterways in India?name them.
1.Allahabad–Haldia stretch of the Ganges–Bhagirathi–Hooghly river system
2. Sadiya — Dhubri stretch of Brahmaputra river.
3. Kottapuram-Kollam stretch of the West Coast Canal
4. Kakinada–Pondicherry stretch of canals and the Kaluvelly Tank, Bhadrachalam – Rajahmundry stretch of River Godavari and Wazirabad – Vijayawada stretch of River Krishna.
5. Talcher–Dhamra stretch of the Brahmani River
6. Lakhipur to Bhanga of river Barak.