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LATEST NEWS UPDATES | Cities At Crossroads: Managing the run-off -Isher Judge Ahluwalia

Cities At Crossroads: Managing the run-off -Isher Judge Ahluwalia

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published Published on Aug 8, 2018   modified Modified on Aug 8, 2018
-The Indian Express

An IIT Delhi report offers important pointers on how to ensure a smooth drainage system in the capital using its natural waterways.

This is the time of year when Delhiites suffer floods and often do not know what to do and who to blame, because the multiple government authorities are busy pointing fingers at each other. Monsoon used to be the season when my generation, as children, used to look forward to some respite from the scorching summer. Now, we protect our children from waterlogged areas in the city, worried that much of the water on the ground may well be mixed with sewage.

A long-awaited report on ‘How to Make Drainage Work in the National Capital Territory of Delhi’, prepared by Professor A K Gosain and his team from IIT Delhi, has just been submitted to the Department of Irrigation and Flood Control of the government of Delhi. The contributors to the study include “insiders”, that is, people from municipal corporations, Public Works Department (PWD), Irrigation and Flood Control Department, Delhi Jal Board (DJB) and Delhi Development Authority (DDA). The report spells out what is needed to ensure that the drainage system in Delhi works efficiently.

There are three major drainage basins in the NCT of Delhi — Najafgarh, Barapullah and Trans-Yamuna basins — and, there are 22 natural drainage systems in these basins which outfall into the Yamuna somewhere during its 46 km-run through Delhi. There are 201 sub-segments of the natural drains in these networks. These “drains” are actually the waterways that carry the run-offs from the plains to the river Yamuna and also recharge groundwater, besides supporting biodiversity. Calling them natural drains that provide safe exit to stormwater including floodwaters, understates their ecological significance.

The IIT team reports that many of these channel drains have been encroached and are disappearing: 19 out of the 201 natural drains mentioned in the 1976 Master Plan of the Delhi Government cannot even be traced today. Of the rest, some are filled with solid waste and, sometimes, construction debris; Others carry sewage and hence function as sewers.

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The Indian Express, 1 August, 2018, https://indianexpress.com/article/opinion/monsoon-rains-weather-delhi-flooding-drainage-system-development-authority-5285343/


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