₦airaland Forum

deomelo:
It's always easy for the layman without any studies, data, weather or meteorology experience to spew baseless assertions and offer meaningless solutions to what they really know nothing about.

Why not show us the survey data and studies report you based your conclusions on.


What you drain ends up in the sea or lagoon, but with high sea and lagoon water level, water heads inland and pushes what you drain back inland. Drainage works when you have low sea level to properly receive water from the drainage system.


The only solution to me sounds more like building water basin or reservoirs in neighborhoods to collect and retain rain water and release the same rain water into the sea or lagoon when water level drops.

In many cities with the best drainage and city planning, they know drainage can not solve their problem, so they passed laws that mandate new development to construct water retention basin to prevent flood.

No drainage can keep up with too much rain and fast moving water.






Retention ponds





Drainage can not save you when you are below sea level, it helps only when you are higher than the sea level.


When you flush your toilet and send poo from your poo drainage or pipes into your septic tank, it flows inside your septic easy, but when your septic tank is full, your tank is full and your poo level high, it means your septic tan can not accept any pore poo and no amount of drainage system can help you, you have to reduce the poo level in your poo tank before draining any poo into it.

Shey you get the gist?

You are obviously not an engineer. This problem has already been solved by the Japanese in Tokyo, the only problem is that the system is expensive.

https://www.google.ca/amp/gizmodo.com/tokyo-has-the-largest-underground-water-tank-in-the-wor-1696967098/amp


https://www.youtube.com/watch?v=o85teh1vU_0

Guestlander:
You are obviously not an engineer. This problem has already been solved by the Japanese in Tokyo, the only problem is that the system is expensive.

https://www.google.ca/amp/gizmodo.com/tokyo-has-the-largest-underground-water-tank-in-the-wor-1696967098/amp

So, the U.S. Corps of Engineers and Harris County Flood Control District prescribed water retention basins know nothing about engineering even though they have some of the best engineers in the world.

Please slow down on the rhetoric.

1. What problem was solved and what's been an engineer got to do with what I stated and what you posted about Japan?

2. What I stated about the need for water retention in Lagos and how they are also using water retention basis in the UD is the same thing you just posted about Japan.

3. Japan is nit doing anything new and they did not solve any unknown solution because the solution is the same thing and its called water retention.

Water retention basins stores rain water that can not flow easily into the river, sea or bayous and it's done by digging basins or reservoirs to collect water and later release the water into the river, sea, lagoon or bayous when eventually their levels subside.

4. Japan is doing the same thing by building underground water retention system to collect rain water and pump the water into EDO river later.

The underground construction, comprising vertical shafts to store floodwater

http://web-japan.org/trends/11_tech-life/tec130312.html

The fact that Japan can afford expensive waster retention system doesn't mean water retention is a new discovery, they just have money to spend on their own retention system.

You can dig a retention basin and achieve the same objective with less money and it's still water retention regardless how it's done.


Read your own article and look for water storage, it's still the same thing.

Houses are collapsed and half-buried in the mud following the flooding caused by heavy rain in Asakura, Fukuoka prefecture, southwestern Japan, Friday, July 7, 2017. Heavy rain warnings were in effect for much of the southern main island of Kyushu after Typhoon Nanmadol swept across Japan earlier in the week. (Koji Harada/Kyodo News via AP)

Btw, this is Japan last Friday or 2 days ago.



.

That is not Tokyo though. I only mentioned the Tokyo drainage system as applicable to Lagos. I didn't mention some random town in Japan.

Guestlander:
That is not Tokyo though. I only mentioned the Tokyo drainage system as applicable to Lagos. I didn't mention some random town in Japan.

I don't remember quoting you or equating that post with your Tokyo post. I moved on.

What are the way out of this Man made restructuring of the ecosystems that is bringing more discomfort to humanity than it's benefits.

Hmmmm When good things happen in Lagos, they say NO man's land but when things like this happen, they will say SW poo, zoo is falling. I hail IPOB Baboons oo.

Anyway I decry the poor state of drainage system on the Island but with good drainage system and no Eko Atlantic project, this flood is bound to happen which has occurred some years back when the Atlantic city is yet to commence which we can say it's a natural disaster just like in countries like Japan, USA, China, etc.

This is blessing in disguise, let's roll out boats, swimming to prepare for Olympic games, Not funny. Sand filling is uncalled for, let's build house in Ocean without sand filling like Dubai

Dumaknesset:
Lagos Flooding: Eko Atlantic City Takes The Blame
Jul 9, 2017 Commentaries
Eko Atlantic City
The incessant flooding on the Lagos Island has gotten worse each year and this has been attributed to the Eko Atlantic City project. A project that is being developed by Lebanese businessman Gilbert Chagoury, a bonafide hustler who made his fortune during the Abacha era. The project was flagged off during the Fashola administration and has the blessing of Bola Tinubu, who is allegedly a silent partner in the project.

According to Mimi Onuoha, a Brooklyn based artist and researcher, the flaw in the construction of the Eko Atlantic City is responsible for the worsening flooding in Lagos city. A flood that just this rainy season has caused several casualties and billions of Naira in damages to property and infrastructure in the State.
In her report for Quartz, Mimi writes:
Eko Atlantic is the name of a grandiose project to create a new economic capital for Africa—notably, right next to the current economic capital for Africa. The development includes everything from sky-scrapers to luxury apartments, a new financial district, a private power-grid, and a shopping boulevard in the image of New York’s Fifth Avenue. It’s the brainchild of the Chagoury brothers, two Nigerian-born billionaires of Lebanese descent who own South Energyx Nigeria Ltd, a real estate development company created to build out Eko Atlantic.

Eko Atlantic is meant to be an antidote to Lagos’s deepest recession in 30 years. The city is meant to bring 250,000 new jobs and address a housing shortage brought on by a surging population. This, and the fact that it’s privately-funded, have lent it the support of the state and federal governments. It’s being sold to investors as “a valuable foothold in Africa” one of the world’s last emerging growth markets.
But what makes Eko Atlantic’s development especially noteworthy is its location. The planned city borders Lagos directly. Eko Atlantic was built by dredging up and filling in 10 kilometers (about 6.2 miles) worth of land. Before the project began in 2009, the peninsula was virtually non-existent.
The result is that Eko Atlantic has the appearance of being an island created out of thin air. Satellite imagery highlights just how dramatic an effect the construction — which is far from finished — has had on Lagos’ coast.

Satellite imagery courtesy of DigitalGlobe
The government of Lagos has programs in place to address coastal erosion because Lagos’ location leaves it deeply susceptible to rising sea levels and catastrophic storm surges. In 2012, a storm surge in the exact area of Eko Atlantic’s construction killed 16 people.
In the aftermath of the tragedy (which some blamed on disturbances caused by Eko Atlantic’s building) the developers of the project highlighted the fabrication of “The Great Wall of Lagos,” a sea wall that wraps around the city and protects it from the effects of the surrounding Atlantic.

But according to some climate scientists, the same wall that will protect Eko Atlantic could worsen the situation for neighboring areas not protected by it, which includes much of Lagos. Dr. Alan Blumberg, renowned for his research and the effects of climate change on water structures, highlighted the challenges in a phone call.
“What happens when you build a wall is that the approaching storm surge will come up to the wall, and it will move to the left or right of the wall, searching for a weakness or a low spot. If there are two islands close to each other, it may go to the island next door instead.”

Construction of Eko Atlantic’s Great Wall
David Frame, Managing Director of South Energyx Ltd, said in a statement to Quartz, that the sea wall is designed and tested to handle the worst storms in hundreds/thousand years; “The Great Wall of Lagos will ensure that everyone living and working within the 10 square kilometres (6.2 miles) of reclaimed land for Eko Atlantic and the population of Victoria Island are protected from the sea.”
For Lagos, a city composed of a series of islands, if this is not the case, the situation Blumberg describes could be disastrous. Lagos’ surrounding areas are not only unprotected by the wall, but are lower in sea level than Eko Atlantic. It’s a combination that leaves the old city of Lagos and its hundreds of years of history startlingly vulnerable.

If the critics are correct, Eko Atlantic might provide parts of Lagos with yet another link to the sea, one rooted in potential danger and unknowable risk. To the sea parts of the city may return.

Source or did you write it from thin air