In what way can floods be converted into a sustainable source of irrigation and all-weather inland navigation in India? (UPSC 2017, 15 Marks, )

Introduction

Floods are a common occurrence in India, causing widespread damage to crops and infrastructure. However, with proper planning and infrastructure, floods can be converted into a sustainable source of irrigation and all-weather inland navigation.

Explanation

Converting Floods into a Sustainable Source of Irrigation

Floodwaters, traditionally considered destructive, can be harnessed as a sustainable irrigation source through effective planning. Here are ways this can be achieved:

  • Floodwater Harvesting:
    • Storing floodwaters in reservoirs or underground recharge systems during peak flow seasons.
    • Example: Check dams and percolation tanks in regions like Rajasthan and Gujarat are used to store floodwaters, later released for irrigation during drier periods.
  • Floodplain Management:
    • Utilizing the natural overflow of rivers onto floodplains to irrigate crops.
    • Example: The diara lands of Bihar and West Bengal use floodwater to cultivate rice and jute during monsoons.
  • Spate Irrigation:
    • A method where floodwaters are diverted to fields using earthen channels. This system supports agriculture in arid and semi-arid regions.
    • Example: In Kutch, Gujarat, spate irrigation is used, where floodwater is channeled to fields during the rainy season to grow crops like sorghum and pulses.
  • Wetland Utilization:
    • Floodwaters replenish wetlands, which can be used for irrigation when they dry out post-flood.
    • Example: Wetlands in Assam are flooded during monsoons, and their water is later used for agriculture.

All-Weather Inland Navigation in India

Inland waterways provide an economical and eco-friendly mode of transport. Here's how India is improving all-weather inland navigation:

  • National Waterways Development:
    • India has declared 111 National Waterways, aiming to promote all-weather navigation. These waterways are regularly dredged and maintained to ensure year-round usability.
    • Example: National Waterway 1 (NW-1) on the Ganges River from Prayagraj to Haldia stretches over 1,620 km and allows for all-weather navigation.
  • River Interlinking Projects:
    • Interlinking rivers for better water management not only aids irrigation but can also improve inland navigation routes.
    • Example: The Ken-Betwa link project is an example where navigation benefits are expected alongside irrigation.
  • Infrastructural Support:
    • Construction of multi-modal terminals along rivers to support the loading and unloading of goods during all weather conditions.
    • Example: The terminal at Varanasi on NW-1 facilitates cargo movement throughout the year.
  • Dredging and River Training Works:
    • Regular dredging is done on inland rivers to maintain sufficient depth for ships during low-flow seasons.
    • Example: The Brahmaputra River (NW-2) is frequently dredged to ensure year-round navigation between Sadiya and Dhubri in Assam.
  • Technological Integration:
    • Introduction of GPS-based tracking and modern navigation techniques to enable safe and efficient inland shipping throughout the year.

Conclusion

By converting floods into a sustainable source of irrigation and all-weather inland navigation, India can harness the potential of these natural disasters for the benefit of its economy and society. With proper planning and investment in infrastructure, floods can be turned into a valuable resource for the country's development.