Motive: After a great first spell of the north-east monsoon, the bottom water desk throughout the town, particularly in areas equivalent to Arumbakkam, Kolathur, Velachery, Villivakkam and Vadaperumbakkam, has risen between 2 and eight ft. Consultants stated that the bottom water desk has reached a saturation level in lots of areas and residents must use pumpsets in case of flash inundation.
S Sethuram of Natesan Salai in Ashok Nagar spent Rs 5,500 on pumpsets for 2 days, after water started to movement into his compound from a rainwater harvesting construction. “For now, the flooding has stopped. However we don’t know what to do when the second spell begins,” he stated.
His dwelling was constructed 40 years in the past and lies at a couple of metres beneath sea degree. Consultants defined that groundwater aquifers are often trapped between two exhausting rock layers, and if replenishment occurs quicker than utilization, water in shallow aquifers creeps up by way of cracks and crevices.
Hydrologists have additional cautioned civic authorities that many extra areas will witness such incidents as monsoon features energy in coming days. “The Higher Chennai Company is specializing in floor water flooding by b u i l d i n g drains. However the floor water flooding can even need to be addressed scientifically,” Sekhar Raghavan, director of Rain Centre, stated. Metrowater and the Chennai Company ought to create a map of areas which have floor water desk at floor ranges.
Water provide to those areas ought to be stopped or decreased, stated Raghavan. “Folks ought to faucet floor water and guarantee there’s extra room for percolation within the coming days,” he stated. Hydrogeologist J Saravanan stated the issue shouldn’t be new to Chennai. “Groundwater flooding will occur extra in clayey soil area than in localities with sandy soil as water retention in clayey soil is greater compared.
Areas which are low-lying and having basements ought to be prepared with pumpsets within the subsequent spell,” he stated. Floor water degree in Thiruvottriyur was 4 ft on October 20, however is now 1.4 ft. At Anna Nagar, it was earlier between 2-3 ft, and is 0.5 ft as of now.
When TOI scanned Metrowater’s information on real-time groundwater ranges alongside coastal aquifers, it discovered that the extent is already in plus-category, which implies it’s above the bottom degree. With the town bracing for an intense spell of monsoon, the actual check for Metrowater and civic managers of the town company begins when it rains, and pours.