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LATEST NEWS UPDATES | The desertification of Tamil Nadu -Nilakantan RS

The desertification of Tamil Nadu -Nilakantan RS

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published Published on Aug 18, 2015   modified Modified on Aug 18, 2015
-The Hindu

How private wells and paddy are drying up the southern State.

Chennai: Tamil Nadu is water deficit. A structural deficit and not a seasonal one. The total assessed water resources in the State amount to 1,587 TMC (thousand million cubic feet) while the State government's demand estimate is 1,894 TMC. Demand exceeds supply by 19.3 per cent; this happens when rainfall is "normal".

Consider what gets reported as normal: the aggregate data from across the State that Indian Meteorological Department (IMD) releases. That often does not reflect what went on in the districts. Each district has a different estimate of normal as well, complicating the meaning of a single final figure further. Tamil Nadu's water conservation and reservoir systems are not integrated to the degree that we can take this aggregate number in isolation.

For instance, last season's rainfall for Tamil Nadu was 12 per cent below the estimated normal. The IMD classifies that deviation as normal rainfall. The threshold at which it gets classified as deficit is 20 per cent below estimated normal. Of Tamil Nadu's 34 Meteorological subdivisions, 24 had rainfall below the estimated normal. And of these, 17 had more than 20 per cent deficit. That is, half the State was classified deficit by the IMD measure. Only 4 subdivisions had excess rainfall.

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The Hindu, 17 August, 2015, http://www.thehindu.com/opinion/op-ed/the-desertification-of-tamil-nadu-rice-and-private-wells-exacerbate-states-water-crisis/article7549810.ece?homepage=true


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