Venice has been keeping flood records for 150 years, though it is generally understood that the city has been regularly flooding since the very beginning. It usually happens between the fall and the spring and the earliest record is believed to be from the 6th century.
This past week, Venice saw its acqua alta (or high water) peak at 187cm (6'2") above its normal level. This is the second highest number on record and is just below its 1966 peak. At these numbers, about 80% of the historic center is underwater. Here is a chart from the WSJ explaining that:
Venice has been working on a flood management project called MOSE since the 1980s. The name is an acronym, but there's a deliberate biblical reference here. Remember when Moses parted the red sea?
The project has been mired in engineering delays and corruption scandals, and so it's not yet operational. If it were, it would have, in theory, protected the city this past week. 2022 is the anticipated completion date, but I don't know if that's realistic or not.
The system consists of 78 mobile gates that fill with water and sit flat on the seabed when the tide is low. When a high tide is predicted, the gates are then to be pumped with air so that they rise (hinged on one side) and close off the three inlets that connect the Venetian Lagoon to the Adriatic Sea.
As I was reading about this project and everything else that has been going on in Venice this past week, I became curious about how exactly the Dutch have been managing to hold back the sea. I mean, a big chunk of the Netherlands sits below sea level.
If you're also curious, here's a video that explains how they do it.
Do you believe that human action has caused and is causing negative outcomes with respect to the environment?
The New York Times published a feature piece this week on the flooding of the US east coast.
Associated with the article is a fantastic infographic that shows all of the NOAA (National Oceanic and Atmospheric Administration) tide gauges up and down the eastern seaboard. It then zooms in to a few locations and shows mean sea level rise (in inches) since 1950 and the number of days of “nuisance flooding.”
Here’s a sample screenshot:
If you don’t feel like reading the full article, at least
Resiliency is an important topic in urbanist circles these days.
New York is working on a 10 mile “Dryline” to protect itself from future storms similar to Hurricane Sandy. And Miami Beach – one of the most vulnerable cities in the U.S. to sea level rise – is frantically building pump stations and raising its seawalls, streets, and sidewalks.
Here’s what the city’s public works director had to say via a Curbed article published about a week ago:
Miami Beach is planning to spend upwards of $500 million over the next five years on the pump stations and street-raising projects. “We are quite certain we are going to buy ourselves another 30 years, and we are hoping we are going to buy ourselves another 50 years,” Carpenter said.
According to Wired, sea levels off the coast of South Beach have risen by 3.7 inches since 1996. But over the last 5 years the high tide levels have had an average increase of about 1.27 inches per year!
Venice has been keeping flood records for 150 years, though it is generally understood that the city has been regularly flooding since the very beginning. It usually happens between the fall and the spring and the earliest record is believed to be from the 6th century.
This past week, Venice saw its acqua alta (or high water) peak at 187cm (6'2") above its normal level. This is the second highest number on record and is just below its 1966 peak. At these numbers, about 80% of the historic center is underwater. Here is a chart from the WSJ explaining that:
Venice has been working on a flood management project called MOSE since the 1980s. The name is an acronym, but there's a deliberate biblical reference here. Remember when Moses parted the red sea?
The project has been mired in engineering delays and corruption scandals, and so it's not yet operational. If it were, it would have, in theory, protected the city this past week. 2022 is the anticipated completion date, but I don't know if that's realistic or not.
The system consists of 78 mobile gates that fill with water and sit flat on the seabed when the tide is low. When a high tide is predicted, the gates are then to be pumped with air so that they rise (hinged on one side) and close off the three inlets that connect the Venetian Lagoon to the Adriatic Sea.
As I was reading about this project and everything else that has been going on in Venice this past week, I became curious about how exactly the Dutch have been managing to hold back the sea. I mean, a big chunk of the Netherlands sits below sea level.
If you're also curious, here's a video that explains how they do it.
Do you believe that human action has caused and is causing negative outcomes with respect to the environment?
The New York Times published a feature piece this week on the flooding of the US east coast.
Associated with the article is a fantastic infographic that shows all of the NOAA (National Oceanic and Atmospheric Administration) tide gauges up and down the eastern seaboard. It then zooms in to a few locations and shows mean sea level rise (in inches) since 1950 and the number of days of “nuisance flooding.”
Here’s a sample screenshot:
If you don’t feel like reading the full article, at least
Resiliency is an important topic in urbanist circles these days.
New York is working on a 10 mile “Dryline” to protect itself from future storms similar to Hurricane Sandy. And Miami Beach – one of the most vulnerable cities in the U.S. to sea level rise – is frantically building pump stations and raising its seawalls, streets, and sidewalks.
Here’s what the city’s public works director had to say via a Curbed article published about a week ago:
Miami Beach is planning to spend upwards of $500 million over the next five years on the pump stations and street-raising projects. “We are quite certain we are going to buy ourselves another 30 years, and we are hoping we are going to buy ourselves another 50 years,” Carpenter said.
According to Wired, sea levels off the coast of South Beach have risen by 3.7 inches since 1996. But over the last 5 years the high tide levels have had an average increase of about 1.27 inches per year!
What’s frustrating about the whole climate change debate is that it remains not only a debate, but an ideological debate. Here’s a quote from the article that stood out for me:
“I’m a Republican, but I also realize, by any objective analysis, the sea level is rising,” said Jason Buelterman, the mayor of tiny Tybee Island, one of the first Georgia communities to adopt a detailed climate plan.
In other words: I’m not supposed to think this way, but I do.
Politics.
This matters a great deal because of what South Beach would look like if sea levels increased by 2 feet (via the Miami Herald):
It’s for this reason that Miami Beach has been working to alter its street elevations and install pumps – as many as 80 of them over the next 5 years – that quickly drain stormwater into Biscayne Bay. (The drains are equipped with backflow preventers so that the water leaves but doesn’t come back into the island.)
Here’s an example of a raised street and sidewalk (via the Miami Herald):
And here’s an example of a pump station (via Curbed):
All of this strikes me as necessary work for Miami Beach. But I also think it’s important to keep in mind that all of this is patch work – regardless of how necessary it is right now.
The bigger question is: what are we doing to stop sea level rise? That’s the only way we’re going to get to true, urban, resiliency.
What’s frustrating about the whole climate change debate is that it remains not only a debate, but an ideological debate. Here’s a quote from the article that stood out for me:
“I’m a Republican, but I also realize, by any objective analysis, the sea level is rising,” said Jason Buelterman, the mayor of tiny Tybee Island, one of the first Georgia communities to adopt a detailed climate plan.
In other words: I’m not supposed to think this way, but I do.
Politics.
This matters a great deal because of what South Beach would look like if sea levels increased by 2 feet (via the Miami Herald):
It’s for this reason that Miami Beach has been working to alter its street elevations and install pumps – as many as 80 of them over the next 5 years – that quickly drain stormwater into Biscayne Bay. (The drains are equipped with backflow preventers so that the water leaves but doesn’t come back into the island.)
Here’s an example of a raised street and sidewalk (via the Miami Herald):
And here’s an example of a pump station (via Curbed):
All of this strikes me as necessary work for Miami Beach. But I also think it’s important to keep in mind that all of this is patch work – regardless of how necessary it is right now.
The bigger question is: what are we doing to stop sea level rise? That’s the only way we’re going to get to true, urban, resiliency.
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