Home News India News Delhi’s old drainage system unable to cope with heavy concretisation

Delhi’s old drainage system unable to cope with heavy concretisation

The Capital’s decades-old drainage system is unable to keep tempo with unplanned development, and far of its stormwater administration features are both blocked or have disappeared, main to a number of hours of heavy rain triggering widespread chaos, in accordance to a number of city specialists.

On Wednesday, Delhi Traffic Police updates confirmed there have been no less than 5 cave-ins on key roads, and lengthy visitors jams due to heavy waterlogging was reported from no less than 13 main localities or stretches.The mayhem, which uncovered the delicate civic infrastructure within the Capital, was the consequence of round 4 hours of heavy rain within the morning.

AK Gosain, professor of civil engineering at Indian Institute of Technology, Delhi, said the issue lies in three distinct points: enhance in paved space means much less quantity is absorbed by the bottom and rains lead to heavier water run-off; stormwater drains are getting used for sewage; and most of those stormwater drains don’t let water move freely.

Gosain introduced a grasp plan to the federal government in 2018 figuring out the problems that made the issue most acute and urged a highway map of how the drainage community — which still follows the 1976 grasp plan — might be revamped.

Waste water from rains are meant to comply with a system separate from the one which carries sewage from houses and industries.

This features a community of streams, pure and seasonal water our bodies, and concrete stormwater channels which can be meant to additional drain into the Barapullah canal, the Najafgarh canal, or the Yamuna.

The report by Gosain’s team discovered many of those have been both encroached upon, blocked with waste, or have been disappearing. Around 19 out of the 201 pure drains talked about within the 1976 Master Plan couldn’t be traced.

“Last drainage Master Plan for Delhi was prepared in the year 1976, when the population of Delhi was 60 lakh. Population of Delhi as per Census 2011 stands at 167 lakh (1.67 crore) and the projected population as per projection in Master Plan Delhi 2021 is 250 lakh (2.5 crore),” said a launch from the chief minister’s workplace on August 1, 2018, when the Gosain panel’s report was submitted.

According to the discharge, the primary suggestions have been to guarantee there aren’t any encroachments on such drains, sewage is routed by means of separate sewage channels, dumping of development and demolition particles is stopped, efficient de-silting is carried out and that new stormwater drains are designed and inbuilt such a means that present run-off estimates and structure are taken under consideration.

“The document is circulated among various departments who pass their judgment and drainage work is given in bits and pieces by the government to contractors. The drainage plan is ahead of its time and cannot be comprehended by contractors,” said Gosain in an interview to HT.

Representatives of the Delhi authorities didn’t reply to requests despatched on Thursday for feedback on the status of the plan.

Two different specialists supported Gosain’s evaluation of the state of affairs.

“Delhi’s groundwater recharging area has reduced drastically because of concretisation in the form of roads, paved pedestrian paths, buildings. Where will rain water from a very large surface area go? It will come on to the highways where underpasses don’t have proper drainage. Where they have drainage, it’s not cleaned, it’s choked with plastic,” said CR Babu, professor emeritus on the Centre for Environment Management of Degraded Ecosystems at Delhi University.

“Tree cover along highways can help. They can slow the way rain water falls on the ground and open ground can then be recharged with it,” he added.

Manu Bhatnagar, precept director, Natural Heritage Division, INTACH, said: “Unusual flooding is because of very poor engineering and too much paved hard surface. The converse of waterlogging is water harvesting. Even on top of the Barapullah elevated road, water was standing after rain. This shows poor planning and maintenance.”

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