Chennai: All storm waterways need to be connected correctly to the nearest rivers and channels such as Cooum, Adyar, Kanal Canal, Otteria Nalla and Cotton Channels to drain flood water within one or two hours after heavy rain.
Storm waterways do not have the right bed slopes to drain water to the nearest channel or river.
The starting point of the drainage slope must be higher and the final point must be lower to drain water with gravitational flow.
This is not so wherever the gravitational flow is not possible, officials need to regulate small pump stations in various parts of the city considering the flood flood lines.
Planning Authority needs to involve adequate field engineers to monitor the construction of multi-floor buildings in the CMDA area so that it prevents the blocking of drainage lines and water courses that cause flood havoc.
Corporation changes the design of storm water using a circular RC pipe instead of flat rectangular parts so that flood water easily flows by gravity.
Solid waste in storm waterways has not been completely removed.
Authorities need to clear the storm waterways in the city with men or machines to eliminate all the waste from the channel and not from the Got hole.
Cities such as Tokyo, Kuala Lumpur, Hong Kong and London have built a tunnel reservoir to store excess flood water.
This reservoir can also be used to treat wastewater and pump recycled water.
The government must freeze further urbanization within the city limits.
The population has increased from seven lakh in the 1960s to 70 lakh in 2020.
They must plan satellite cities around a 50 km radius and develop them.
If we do not stop urbanization, the city will suffer such as Mumbai, Bengaluru and Delhi during the rainy season in the future.
(As is ordered to doubt Raman.
Previous experts are Chief Engineers, PWD)