1. Generally Heavy Rains occur when flooding is in process (ie ocean tide is increasing - High tide). 3. Hence excess water over land cannot drain out into sea. As earth rotates and tide is becoming low (Ebbing) the water recedes. 3. Further most of the 'NATURAL DRAIN' paths are blocked in Mumbai and other cities due to constructions. 4. Even though the drains are cleaned, due to high tide and blocking of natural drain paths Mumbai and other cities get flooded when it rains 150 to 200 mm in 24 hrs. 5. So its Man created and Nature created challenge which we have to solve.
BMC is run by corrupt to the core politicians , Bureaucrats whose only mission is to serve their political masters. But the biggest culprits of the city are the people of this city . I dare challenge the people of this city , are youll serious about this city . If so get out of your houses , get on to the streets , dont go to your offices , come out & protest against all these corrupt politicians , dont elect a single one again , bring this city to a standstill , till the govt takes note of this act . Force them to change this BMC. Stop recruiting people who are only interested in signing the daily muster , but spend their work hours somewhere else. Another biggest thing that needs to be stopped once & for all stop the slums . If slums are not there , half of mumbais problem can be solved . Will the citizens of this city come out to bring the change ? Time will tell.
Around 500 cubic kilometers of rain water is to be safely removed and thrown into sea. Gravity flow in drains is not useful as Bombay does not have enough slope. Pumps and pipelines laid all over Bombay is the only technically feasible method.
It is feasible to lay pipelines of around 200 Millimeters diameter in East West direction across Bombay upto sea at both ends and diesel operated vacuum pumps of around 10 Kilowatt each to suck flood water from ground and pump into them. One pump should be connected at each 100 meters or so. After floods the entire system is preferably to be taken away, cleaned, repaired, and stored for next season.
Approximately 500 pipelines of 10 kilometers laid at 100 metre intervals and 50,000 pumps might be needed to take all flood water to sea quickly. Cost would be around INR 2,00,000 X 5,000 = 10,00,000,000 = INR 100 Crores for Pipes, and 1,00,000 X 50,000 = 50,00,000,000 = 500 Crores for the pumps, total = INR 600 Crores only. Maintenance cost per annum at 20 percent = INR 120 Crores. It should give life of at least ten years.
Re: Re: BMC
by bakchod on Jun 20, 2015 05:17 AM
And where will you lay the 200mm pipes? Across the roads, highways and railway tracks??
If you have to make these underground, then the cost will go to 60,000 crore instead of your 600 crore estimate. Maintenance cost will also go up to 500-1000 crore per annum. You have also not accounted for the cost of electricity required for pumping 500 cu km of water. That itself will run into hundred crores.
Fact is that this is unprecedented rain. Nearly 1 foot of rainfall in 24 hours. Many parts of the country don't get so much rain in a whole year.
Also it happened during high tide. Water cannot flow against the tide which is what is causing flooding.
Just wait for 1-2 days and the water will slowly recede.
Re: Re: BMC
by Venu Gopalan on Jun 20, 2015 06:41 AM
Technically ill informed idea. A vacum pump is an inefficient methode to remove water. The drainage system of Mumbai is 130 years old. It will have to be modernized first at huge cost and time and disrupted city life.
Re: Re: Re: BMC
by Venu Gopalan on Jun 20, 2015 07:28 AM
500 cubic kilometers of water is a hugely exaggerated figure. The area of Mumbai is 603 Sq.Kilometers. Yearly rainfall is 3000 mm or 0.003 kilometers. In a year the total rainfall in Mumbai is around 603 x 0.003 Kilometer Cube = 1.8 Kilometer cube.
Around 500 cubic kilometers of rain water is to be safely removed and thrown into sea. Gravity flow in drains is not useful as Bombay does not have enough slope. Pumps and pipelines laid all over Bombay is the only technically feasible method.
It is feasible to lay pipelines of around 200 Millimeters diameter in East West direction across Bombay upto sea at both ends and diesel operated vacuum pumps of around 10 Kilowatt each to suck flood water from ground and pump into them. One pump should be connected at each 100 meters or so. After floods the entire system is preferably to be taken away, cleaned, repaired, and stored for next season.
Approximately 500 pipelines of 10 kilometers laid at 100 metre intervals and 50,000 pumps might be needed to take all flood water to sea quickly. Cost would be around INR 2,00,000 X 5,000 = 10,00,000,000 = INR 100 Crores for Pipes, and 1,00,000 X 50,000 = 50,00,000,000 = 500 Crores for the pumps, total = INR 600 Crores only. Maintenance cost per annum at 20 percent = INR 120 Crores. It should give life of at least ten years.
Around 500 cubic kilometers of rain water is to be safely removed and thrown into sea. Gravity flow in drains is not useful as Bombay does not have enough slope. Pumps and pipelines laid all over Bombay is the only technically feasible method.
It is feasible to lay pipelines of around 200 Millimeters diameter in East West direction across Bombay upto sea at both ends and diesel operated vacuum pumps of around 10 Kilowatt each to suck flood water from ground and pump into them. One pump should be connected at each 100 meters or so. After floods the entire system is preferably to be taken away, cleaned, repaired, and stored for next season.
Approximately 500 pipelines of 10 kilometers laid at 100 metre intervals and 50,000 pumps might be needed to take all flood water to sea quickly. Cost would be around INR 2,00,000 X 5,000 = 10,00,000,000 = INR 100 Crores for Pipes, and 1,00,000 X 50,000 = 50,00,000,000 = 500 Crores for the pumps, total = INR 600 Crores only. Maintenance cost per annum at 20 percent = INR 120 Crores. It should give life of at least ten years.
Around 500 cubic kilometers of rain water is to be safely removed and thrown into sea. Gravity flow in drains is not useful as Bombay does not have enough slope. Pumps and pipelines laid all over Bombay is the only technically feasible method.
It is feasible to lay pipelines of around 200 Millimeters diameter in East West direction across Bombay upto sea at both ends and diesel operated vacuum pumps of around 10 Kilowatt each to suck flood water from ground and pump into them. One pump should be connected at each 100 meters or so. After floods the entire system is preferably to be taken away, cleaned, repaired, and stored for next season.
Approximately 500 pipelines of 10 kilometers laid at 100 metre intervals and 50,000 pumps might be needed to take all flood water to sea quickly. Cost would be around INR 2,00,000 X 5,000 = 10,00,000,000 = INR 100 Crores for Pipes, and 1,00,000 X 50,000 = 50,00,000,000 = 500 Crores for the pumps, total = INR 600 Crores only. Maintenance cost per annum at 20 percent = INR 120 Crores. It should give life of at least ten years.
Re: BMC
by bakchod on Jun 20, 2015 05:27 AM
Corruption caused 286mm of rain in 24 hours and simultaneously caused 4m high tide??
Where do you j0kers come from?
I have lived in Mumbai since my birth. This is normal occurence 3-4 times during rains. I have also lived in Delhi for 6-7 years. If it rains heavily for 1/2 an hour, the whole city gets traffic jams of 2-3 hours.
Mumbai handles the heavy rain much better than any other city in India. In fact, no major city in India gets even 2/3 of Mumbai's rains.
Kolkata at 62 inches comes second after Mumbai at 92 inches annual rain. Delhi gets only 25 inches, Bangalore gets 36 inches, Chennai 60 inches and Hyderabad 32 inches per annum.
So stop crying like a baby and learn to deal with heavy rain if you are a mumbaikar.
