Flood due to raging rivers from excessive rainfall is a very common scenario across the globe, because engineering and technology is yet to invent anything till date, to control the weather's wrath. If we can construct huge underground car parking areas, then humans can also construct underground concrete water reservoirs, because that day is not far off, when humans has to accept and realize that preservation of rain-water and river-water, will be much more important than owning fleets of expensive cars. Whenever there is an excessive rainfall in any geographical region with rivers and its tributaries, the river gradually starts flowing above the threshold/danger mark. I hereby propose to construct automatic emergency water gates along the riversides, at a little lower level as per the danger mark scale. And these automated gates will lead the excess river-water, to the underground concrete water reservoirs (proposed above) through an underground piping system (slanted in a
An Idea Generation Initiative from Barisan Chatterjee