As ME is back to Bangalore after a break, it is getting to read news around the continuous decline of city. As India debates smart cities, it has conveniently ignored the lessons from the once a smart city – Bangalore.
A recent IISC study shows North Bangalore could be flooded given a strong rainfall:
There seems to be no let-up in the bad news about the city’s vanishing lakes and stormwater drains. A recent study by IISc has warned that north Bengaluru is certain to witness heavy water-logging and even flooding in case of a heavy storm or rainfall.
The reason: the fragile network of stormwater drain network in the 73 sqkm area between IISc campus and GKVK campus in Jakkur has rainwater runoff exceeding the drain capacity. The Reliability Assessment of Storm Water Drain Network by IISc as part of the International Conference on Water Resources, Coastal and Ocean Engineering 2015, identified three reasons why the network could fail. “If there is excess flow into the conduits, the water may overflow.
The second reason why conduits can fail is silt deposition owing to heavy flow of rainwater runoff weakening the conduits over time. The third failure model is that the velocity of heavy runoff can also damage the conduits, breaching them and flooding the areas,” said Prof VV Srinivas, who headed the IISc team of researchers. The study has suggested that changing conduit width, slope and roughness of material lining of the conduit could be explored by taking into account conduit erosion and deposition issues. He said this could be the situation in other parts of the city as well but their study focused on this belt only. “If there are downstream lakes and watersheds, the spillover or excess water can flow into these and save us from flooding,” he added.
Lakes have always known to be retainers in stormwater drain management systems as they can hold the water for longer durations. However, he said the study is yet to be complete and the team is working out methodologies to give a value to retainability of stormwater management. This would be useful to civic agencies for designing drains that can retain heavy flow of water during storms.
BTW, North Bangalore has been developed only recently. Thanks (or no thanks) to the airport, the region is finding political favors and property prices zooming ahead (that is the only thing which happens in Indian cities anyways). But as is the case, we have just gone ahead with nonsense planning and ignored all basics of urban development which were known to Harappans as well.
It is also ironical that the city faces a huge water crunch. And when Lords give the city water it has destroyed sources to retain this water. So water finds its place on the roads and potholes. I mean what does one say?
Why are we getting so disconnected from reality? When will city dwellers in India get basic facilities in a proper way? Why do we have to keep coming out with buzzwords and new programs and not really fix the old ones first?
On the Sunday that passed by, there was a medical exam in the state. Students had flocked the city from all parts of the country to give the exam. And guess what? Despite knowing this, we were least prepared to handle the sudden inflow. It was complete chaos with students/parents stranded on the railway station with no taxis available. The taxi guys had a great time as they charged all possible fares given the shortage of supply.
I mean we are not even prepared for a known shock, leave an unknown one..






