Hydrology

Kancheepuram district is known for its ancient network of eris or irrigation tanks, some dating back as far as the 8th century AD. Cheyyur Taluk, falling within Kancheepuram district is no exception. According to Tamil Nadu Public Works Department figures, the Cheyyur Taluk has 82 eris that irrigate more than 16,000 acres, and are capable of storing 3500 crore litres of water.

An eri is a reservoir of water surrounded on three sides by earthern bunds or embankments, with the fourth side being open to catchments from which water flows down to collect in the Eri. Eris are designed such that gravitational pull allows water to flow out through a valve and irrigate a certain extent of agricultural land known as an ayacut.  

 

Additional resources:

1. Aubriot, O. and Prabhakar, P.I. 2011. Water institutions and the ‘revival’ of tanks in South India: What is at stake locally? Water Alternatives 4(3): 325-346

2. Irrigation in Tamil Nadu – Eris and Rivers.

3. T.M. Mukundan’ – The Ery Systems of Tamil Nadu

4. List of non-system tanks in Cheyyur Taluk.

5. Hydrological Implication of 4000 MW UMPP in Cheyyur

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