Tamil Nadu   

Cauvery catchment areas not receiving enough rain

CHENNAI: The present storage of the Mettur dam will barely last 25 days, going by the present rate of inflow and discharge.

On Friday morning, the dam had a storage of about 38.7 thousand million cubic feet (tmcft). The discharge was around 14,000 cubic feet per second (cusecs) and the inflow, 1,500 cusecs.

After giving allowance for dead storage of five tmcft, the present storage can be stretched up to the month-end, according to an official.

The scenario looks gloomier with the Cauvery catchment areas in parts of Karnataka and Kerala not receiving enough rainfall. According to the website of the meteorological department’s headquarters, south interior Karnataka, which covers the Cauvery catchment in that State, recorded 16 cm rainfall in the current season (up to the week ending July 9) against the normal of 20.5 cm, a shortfall of 21 per cent.

For the corresponding period last year, the region received 36 cm.

Another website of the department (Chennai region) said that as on date, Medikere, one of the important catchment areas of the Cauvery, received 81 cm, a deficit of 19 cm.

The combined storage of Karnataka reservoirs across the Cauvery was around 62.5 tmcft against the total capacity of 114 tmcft. Normally, it is from the Kabini reservoir that the authorities in Karnataka release flood flows in the early part of the south west monsoon.

But, this year, there has not been sufficient rainfall. Kabini’s storage was about 14 tmcft against the capacity of 19 tmcft.

Since June 1, Tamil Nadu realised a little more than 8 tmcft against the quantity of 27 tmcft prescribed in the Cauvery Water Disputes Tribunal’s interim order for the elapsed period.

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