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LATEST NEWS UPDATES | Shrinking banks putting Delhi at risk of flooding -Jayashree Nandi & Risha Chitlangia

Shrinking banks putting Delhi at risk of flooding -Jayashree Nandi & Risha Chitlangia

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published Published on Jun 16, 2017   modified Modified on Jun 16, 2017
-The Times of India

NEW DELHI: In 2015, a high-powered panel appointed by the National Green Tribunal and headed by the then union water resources secretary Shashi Shekhar had recommended the ecological development of the Yamuna floodplain in such a manner as to prevent any further encroachments by builders. But with NGT yet to decide on implementing that report, constructions continue on either side of the river.

NGT also asked for the demarcation of the Yamuna floodplain taking into account the areas that get inundated on average once in 25 years. "It is important to demarcate the flood plain on this basis immediately to protect it from any encroachments or development activities, which, as already discussed and requested by the high powered committee, would adversely affect the ecology and environment," the order stated.

Following NGT's order, DDA commissioned IIT-Delhi to carry out the required mapping. Taking the five days between September 2 and September 6, 1995 when Delhi re ceived 174.71mm of rain against an annual rainfall of 617mm, IIT extrapolated the downpour to determine that in the absence of constructions hindering the movement of water, the flooded area would extend to Model Town and Bhalswa in the west and Anand Vihar and Mayur Vihar in the east.

With embankments and massive constructions, however, the depth of flood water, IIT's report said, would rise dramatically to as high as nine metres in some places. "To avoid the enhanced levels of flood water, the Yamuna needs the floodplain," asserted Professor AK Gosain of IIT Delhi.

But with the capital's landowing agency, Delhi Development Authority, the civic bodies and government officials stymied by the lack of clarity on which agency has ownership of floodplain land, encroachments have opened up Delhi to the risk of flooding. Shashank Shekhar, assistant professor of geology at DU, reiterated, "Delhi has two lifelines: the Ridge and the floodplain. They are a source of perennial potable groundwater.But the Yamuna needs its own space to spread out during monsoons and deposit the debris it brings along."

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The Times of India, 16 June, 2017, http://timesofindia.indiatimes.com/city/delhi/shrinking-banks-putting-delhi-at-risk-of-flooding/articleshow/59169994.cms


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