As per figures launched by the district administration, Gurgaon acquired 23 mm rainfall within the 24 hours ending 8.30 am Wednesday, with one other 95 mm between 8.30 am and 11 am. This, officers say, is “six to seven instances” the standard quantity of rain acquired by the town. As some extent of comparability, in 2016, 52 mm rainfall wreaked havoc, resulting in waterlogging in a number of elements and inflicting visitors jams that left a number of folks stranded on the roads for greater than six hours.
Underpass submerged in Gurugram after heavy rains lash Delhi-NCR area pic.twitter.com/z7b0gTS31c
— The Indian Categorical (@IndianExpress) August 19, 2020
Which elements of Gurgaon have been most impacted by the rain?
Officers say your complete metropolis was impacted; there was waterlogging throughout Gurgaon. Among the many worst affected stretches, nevertheless, have been the Narsinghpur-Khandsa stretch, the Golf Course street, and 7 of the 11 underpasses within the metropolis. The DLF Section 1 underpass on Golf Course street was exceptionally unlucky, with rainwater gathering virtually until its roof.
Why was the affect significantly dangerous on the DLF Section 1 underpass?
The placement of the underpass itself results in the construction being susceptible, with runoff water from the Aravalli Hills travelling down by means of the Section 1 space and filling the underpass. Because the construction is situated at a degree under the principle drainage community of the town, DLF has constructed a concrete rainwater harvesting chamber into which any rainwater is supposed to movement. Within the occasion of this filling up, three pumps situated within the underpass are supposed to be activated, pumping the water as much as the principle drainage community. On Wednesday, nevertheless, as soon as the chamber stuffed up and the pumps have been activated, the water, as a substitute of flowing into the drainage community, skilled a backflow, making it not possible to pump it out.
In a number of different elements of the town, officers mentioned, the same backflow occurred, making it not possible to clear the water.
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What was making this backflow of water?
Rainwater usually flows into the Badshahpur drain, which then carries this to the Najafgarh drain. On Wednesday, the unusually heavy rainfall led to the Badshahpur drain flowing at full capability, resulting in it overflowing and making it not possible for the rainwater to be pumped out.
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Why is waterlogging a problem in Gurgaon yearly?
As it’s situated on the foothills of the Aravallis, Gurgaon is at an obstacle. Till the Nineteen Eighties, the town had pure “jheels” by means of which rainwater would movement. As a result of speedy urbanisation within the late 90s and early 2000s, nevertheless, a number of constructions have been constructed on high of, or within the route of those jheels, blocking the pure course of the water.
Additional, a variety of concretisation passed off on the Badshahpur drain itself — the principle drainage system — with this encroachment additional limiting the capability of the drain. In a number of new sectors of the town, a drainage system is but to be constructed and linked to the principle drainage system of Gurgaon.
What’s being carried out to resolve the waterlogging drawback in Gurgaon?
In 2016, a challenge was introduced to broaden the Badshahpur drain at Khandsa village, a 600 metre stretch the place its width reduces from 30 metres to 10 metres. A lot of the work on this has been carried out, however some nonetheless stays because of litigation over constructions that should be eliminated. A complete drainage challenge for the town has additionally been accredited by the state authorities which is able to concentrate on arresting rainwater from excessive degree areas by draining them out by means of creeks. Along with this, the administration can be seeking to develop 20 verify dams within the Aravallis to verify the movement of water down into the town.
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