How is the Cauvery flow boosting storage in delta tanks?

Synopsis
Key Takeaways
- Two-thirds of the tanks in Tamil Nadu’s delta districts are over 50% full.
- Thanjavur has 537 tanks, leading in storage capacity.
- Timely water release from Mettur dam is crucial this year.
- Farmers are optimistic about the samba crop due to improved water levels.
- Further improvements are anticipated with the approaching northeast monsoon.
Chennai, Sep 2 (NationPress) The continuous flow of Cauvery water, combined with a favorable southwest monsoon in adjacent states, has led to an impressive rise in storage levels across nearly two-thirds of the 737 system tanks in Tamil Nadu’s delta regions. This marks a significant enhancement compared to last year, where less than one-third of these tanks achieved similar storage levels.
The primary delta districts — Thanjavur, Tiruvarur, Mayiladuthurai, and Pudukkottai — rely heavily on these tanks, which serve vital roles in irrigation, especially in tail-end areas.
Out of the total 737 system tanks, Thanjavur features the majority with 537, followed by Pudukkottai with 170, Tiruvarur with 28, and Mayiladuthurai having two.
In Thanjavur, known as the core of the Cauvery delta, 38 tanks have reached their maximum capacity, a notable increase from the 19 recorded last year.
Furthermore, 113 tanks are currently holding between 75% and 100% of their capacity, while 184 are within the 50% – 70% range.
Pudukkottai, with its 170 tanks, has one tank at full capacity, 62 tanks between 75% and 100%, and another 62 in the 50% – 75% range.
Officials indicate that the overall situation is significantly more positive than last year, with expectations for further improvements during the northeast monsoon.
A senior official from the Water Resources Department (WRD) mentioned that consistent discharge from the Grand Anicut and Vennaru rivers has substantially increased storage in numerous tanks.
He highlighted that the timely release of water from the Mettur dam on June 12, unlike the delayed opening last year on July 28, has been a crucial factor in this year's success. This season, the dam has attained full reservoir levels four times, boosted by surplus flows from Karnataka, while normal southwest monsoon rainfall in Thanjavur has further enhanced inflows.
This enhanced storage has provided considerable relief to farmers in the delta.
“The tanks around Pattukkottai and Peravurani in Thanjavur and Nagudi in Pudukkottai have impressive water storage this year. The samba paddy cultivation, which is heavily reliant on tank water, will greatly benefit,” shared a farmer from Pallathur in Thanjavur.
Officials are optimistic that with the northeast monsoon approaching in October, most system tanks will reach full capacity, ensuring water security for samba cultivation and bringing joy to the farming community.