T.N. Rains | Nearly 60% of irrigation tanks in State not yet half-full

Though Tamil Nadu received around 33 cm of rain in the last 2 months, storage in 8,230 tanks ranges from nil to 50%. Madurai, despite surplus rainfall, has 1,069 tanks in this category

December 01, 2023 12:38 am | Updated 10:29 am IST - CHENNAI

Nearly 60% of the irrigation tanks in Tamil Nadu are not even half-full, despite the State receiving around 33 cm of rainfall in the last two months.

Of a total of 14,139 tanks, the storage in 8,230 tanks ranges from nil to 50%. Three districts — Madurai, Sivaganga, and Pudukottai — account for 3,533 tanks with poor storage. Madurai, despite recording a surplus rainfall of 27% in October and November, has 1,069 tanks under this category. The total number of tanks in the district is 1,340.

In Sivaganga district, which has 1,351 such tanks, there has been no surplus rainfall. Yet, it has registered a positive deviation from the normal.

In other words, till now, it has received 35 cm of rainfall against the anticipated amount of 34 cm.

Though it is too early to identify reasons with respect to poor storage, one of them could be the encroachments on, or obstructions in, the channels supplying to the tanks.

However, there is nothing surprising about Pudukottai, which has 1,113 such tanks, as the district received 16% less rainfall than the anticipated amount.

Two other districts — Thanjavur and Tirunelveli — have about 530 tanks each, with a storage of up to 50%. Like Madurai, Tirunelveli received surplus rainfall, at 47%. Yet, 537 of the 780 tanks in the district have poor storage.

But, in respect of Thanjavur, the situation is understandable as it is a deficit district in terms of rainfall with a departure of -33%.

Otherwise, Kanniyakumari, which has recorded 79% excess rainfall in the last two months, is comfortably placed with 1,832 of its 2,040 tanks having a storage ranging from 51% to full (100%).

It accounts for almost one-fourth of the tanks in the State with full storage.

Chengalpattu and Ramanathapuram, both famously called “Eri Mavattangal” (tank districts), share the honours with the southernmost district as their tanks (489 and 429 respectively) have storage ranging from 51% to 100%.

Top News Today

Sign in to unlock member-only benefits!
  • Access 10 free stories every month
  • Save stories to read later
  • Access to comment on every story
  • Sign-up/manage your newsletter subscriptions with a single click
  • Get notified by email for early access to discounts & offers on our products
Sign in


Comments have to be in English, and in full sentences. They cannot be abusive or personal. Please abide by our community guidelines for posting your comments.

We have migrated to a new commenting platform. If you are already a registered user of The Hindu and logged in, you may continue to engage with our articles. If you do not have an account please register and login to post comments. Users can access their older comments by logging into their accounts on Vuukle.