Carnival: mopping up

You thought Carnival was over with the sprinkling of the ashes on penitential hairdos?   Not quite.

Carnival doesn’t slink away under cover of darkness when the marangon, the basso profundo bell in  the campanile of San Marco, tolls midnight on Martedi Grasso.   Two things have to happen for it to really be over — in my opinion, that is.   Two things which are more predictable  than the  swallows returning to Capistrano.  

One of the regular car ferries is engaged for the carnival trucks.
One of the regular car ferries is engaged for the carnival trucks.

The first is the pulling apart and hauling away of  the traveling amusement park (what they generically call a “Luna Park” here) which has been gracing the Riva dei Sette Martiri since — I believe — early December.  

These people (as in much of the world) are almost exclusively families which have dedicated many generations to the setting up, operating, pulling down, and rolling on to the next location of their ride or concession stand.  

After three months, I’m going to miss the smell of the hot-doughnut-frying-oil and the screeching of the children.   It was fun strolling along the waterfront late every afternoon to mingle and kibitz.   And I am convinced that as long as there is at least one small child  walking home carrying a  small plastic bag containing water and a goldfish, the world will  not come to an end.

All this concentrated traffic is a lot to ask of a stretch of walkway which is made of small stones atop packed damp sand.
All this concentrated traffic is a lot to ask of a stretch of walkway which is made of small stones atop packed damp sand.

Anyway, the men start work early on Ash Wednesday morning, and by Thursday morning the  funfair is gone.   The only sign  they’ve ever been here  are the patches of new cement filling the holes in the pavement where their big rigs (or something) went astray.

Speaking of itinerant carnies, I went to the small town of Bergantino a few years ago when I was working on a story about the Po River (National Geographic, May, 2002).   This former farming town has, since the Twenties and much more since the Sixties, become dedicated to the design, construction, and (eventually) operation of carnival rides —    merry-go-rounds, bumper cars, etc.   Despite the town’s modest size — it’s really just a village of some 2,000 people, when they’re all there, I mean, and not out on the road —  they’ve carved away a heavy slice of this international industry for Italy.   One of the major markets for their inventions is the USA.

Well, wherever they’ve gone, I’m already missing them.

The second element of the end of  Carnival is the orgy of articles, editorials, and letters in the Gazzettino reviewing, celebrating, and vilifying the festivities just concluded.   I can tell you without even having opened the paper that there will have been too many people for this fragile city to support; that the managing of this predictable overload will have shown inexcusable organizational flaws and failures to resolve the most elementary large-event necessities (toilets, in a word); that the money taken in doesn’t justify the stress and expense to the city; that it will have lacked originality and creative genius, and that for the residents and shopkeepers of Campo Santa Margherita, the ten days just concluded have been nothing less than at least six of the nine rings of hell.  

And every year,  the apex of all the claims and counter-claims:   That this event would be (or ought to have been, or next year definitely will be) the “Carnival of the Venetians.”   I saw Venetians having a fine time carnivalizing in their own modest way in various neighborhoods of the city, but not in the Piazza San Marco.   I’d have given you a cash prize  if you’d found any Venetians besides Lino in the Piazza San Marco.  

Going-home time near San Marco.  I count eight launches ready to load up and head back to the mainland, and this picture is only one third of the traffic panorama.  This traffic is not composed of Venetians.
Going-home time near San Marco. I count eight launches ready to load up and head back to the mainland, and this picture is only one third of the traffic panorama. This traffic is not composed of Venetians.

So when this wish to involve Venetians is mentioned, as if it were obviously a good thing,  I ask myself  if the speaker  believes that  a “Carnival of the Venetians” would  have the slightest probability of pouring the millions of euros into the municipal strongboxes that all those tourists do.   After all, Venetians don’t spend money on hotel rooms, restaurant meals, fancy masks, or whatever else makes Carnival matter.   So frankly, what would be the point of spending money to organize a ten-day carnival for the few remaining locals?   Just wondering.

Let’s go to the videotape (so to speak).   Here is a smattering of the Gazzettino’s   overview of Carnival 2010, as published yesterday:

The organizers claim that 150,000 people came the first Sunday; 250,000 the second Sunday (let that sink   in…) and 40,000 on Martedi Grasso.   Altogether, they say a total of 800,000 people came to Venice during Carnival.   Perhaps not much compared to Rio, but for a city that covers a mere three square miles, not bad.

IMG_8030 carnival compThey estimate that each visitor spent 50 euros, for an exciting total income of 40 million euros.   Not sure where this number came from; a professor of the Economics of Tourism at the University of Venice says that the “bite and run” day-trippers spend an average of 30 euros each day, while the more solid tourist spends 150.   In any case, let’s not quibble over a million more or a million less.   Restaurants and hotels certainly made money, not to mention the ACTV and their spectacularly expensive vaporetto tickets.

One new comment is by the businesspeople (especiallythose of  restaurants and cafes) in the Piazza San Marco — they don’t want a maxi-stage there anymore.   I’m not sure why, but I imagine it’s because it takes up too much space which needs to be available for them to put out their tables and chairs.  

I  could go on, but it’s probably not that interesting.     These few days following Carnival are mainly spent in a sort of  emotional and mental scrubbing and disinfecting.  

I am going to miss this, though.
I am going to miss this, though.

The summary is fairly concise.   Apart from numbers, claims, and counter-claims as to success or failure, as one reporter wrote, “Now the Venetians can give a deep sigh of relief and put their hands on their foreheads and say, “‘Once again we’ve lived through it.'”

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Motondoso, Part 4: The lagoon’s-eye view

Quick review so far:   Who or what  does motondoso hurt?   You’re going to say “Buildings and sidewalks.”  It’s obvious.

Buildings are what people care about — logical, since no buildings, no Venice.   Some Venetians have told me that they don’t believe anything will be done to resolve  motondoso  till an entire building collapses, a notion that once seemed idiotic  until I came to realize that it could happen.   A  building collapsing, I mean, not that  it would lead to any meaningful action, though one can always dream.

So  perhaps some structure really will have to be sacrificed, like an unblemished white heifer,  for the benefit of the tribe.   The idea has a romantic, mythic quality to it that’s almost appealing.

You could also say “People,” about  which I haven’t said much, if anything,  and you’d be right again.   The most obvious hazard that waves present is the risk of capsizing; every so often you read about some tourists in gondolas who have gone into the drink.   There was even a traghetto (gondola ferry that crosses the Grand Canal) that got blindsided by an anomalous wave and the whole cargo of passengers went overboard.   I seem to recall that a small child got caught beneath the overturned boat, but one of the gondoliers pulled him out in time.   Some years ago an American woman  drowned.  Fun.

Erosion caused by the waves continually sucking soil out from under and between stones means the stones collapse, but sometimes  a person collapses with them. It happened to a woman walking along near the Giardini one day — she put her foot on a stone, it gave way, and faster than you can say “Doge Obelerio Antenoreo”  she fell into a hole higher than she was. Nobody in the neighborhood was surprised; they’d been sending complaints to the city for months  to no avail.

Then there was the child playing on a stretch of greensward at Sacca Fisola facing the Giudecca Canal when a hole  suddenly opened up   beneath him.   If a man with quick reflexes hadn’t grabbed him, the child would long since have gone out to sea.   Events such as these — and may they  be few —   no longer inspire surprise.

This satellite view of the Venetian lagoon gives a general hint of the variations in depth. These variations are part of what make it a lagoon and not, say, Baffin Bay.
This satellite view of the Venetian lagoon gives a general hint of the variations in depth. These variations are part of what make it a lagoon and not, say, Baffin Bay.

But what if you weren’t a human?   This question may not often cross your mind, but Venice looks radically different to its other fauna, and not a few flora, as well.   And waves are not their friend.

What really makes Venice so special is its  lagoon, which  covers 212 square miles.   Without the lagoon and its concomitant canals,  Venice  would merely be a batch of really old buildings — beautiful or not, depending on your taste —  which could just as well be sitting on the outskirts of Enid, Oklahoma.

I will be expatiating on the lagoon on another occasion. (A Venetian word, by the way: laguna).    The witness (that would be me) is instructed (by me) to stick to the topic at hand, which is waves.

A more detailed view of the lagoon immediately surrounding Venice gives a better idea of how the area is shaped.  These shallows, though, are not barene.  (Photo: oceana.org)
A more detailed view of the lagoon immediately surrounding Venice gives a better idea of how the area is shaped. These shallows, though, are not barene. (Photo: oceana.org)

The Venetian lagoon is a silent but intimate partner in Venice’s fate.    Not only are the waves undermining the foundations of  the city, they are scouring away the foundations of the lagoon.   And while damage to buildings is certainly important, there is arguably even more damage being done to its waters.   And they’re going to be a lot harder to fix than a palace.

So if you   haven’t got time to watch  what waves can do to buildings, you should take a look at what they do to the lagoon — specifically to  the barene (bah-RAY-neh), the marshy, squidgy islets strewn about out there.   Venice was built on 118 of them.

These are barene.  Looks like lots, but 60 years ago there were half again as many.  That was a real lagoon.
These are barene. Looks like lots, but 60 years ago there were half again as many. That was a real lagoon.

Barene  are the building blocks of the lagoon.   They form  20 percent of its total area, and  are crucial to everything in it: microorganisms, plants, animals, birds, fish and, till not so long ago, also people.

Let’s say you have less than no interest in ecosystems and their inhabitants, at least the inhabitants smaller than humans.   Barene, along with their myriad meandering capillary channels, are perfect for slowing down the speed and force of the incoming tide.    They act as  a built-in assortment of natural barriers which, if they could remain where they were, would already be limiting the force and the quantity of acqua alta in good old Venice.

But over the past 60 years, half of the lagoon’s barene have been lopped away by waves.   The World Wildlife Fund estimated, several years ago, that at the current rate of erosion (erosion caused by motondoso), in 50 years there would be no more barene left.

A cross-section of a barena near Burano.  If you were an endangered bird, or even just a really tired one, this patch of mud would be more beautiful to you than twenty Titians.
A cross-section of a barena near Burano. If you were an endangered bird, or even just a really tired one, this patch of mud would be more beautiful to you than twenty Titians.

Why do we care?   Even if all we’re really interested in is  buildings, we care because as the barene diminish,  the tide can reach the city faster and  ever more aggressively.   The natural brakes, so to speak, are being taken out.

And we also care because, as I have probably said before, whatever a wave can do to a batch of mud it can and will eventually do to bricks and marble.

Part 5: Solutions?

Waves are as destructive to wetlands as they are to buildings, but the wetlands can't even put up a fight.
Waves are as destructive to wetlands as they are to buildings, but the wetlands can't even put up a fight.
The large pilings were put in ages ago, to mark the line between the channel and the barena. As you see, the waves have shrunk the barena, so the large pilings are only sort of symbolic. As a bonus, we see the remnants of the wall of smaller pilings which was installed to prevent any further erosion of the barena.
The large pilings were put in ages ago, to mark the line between the channel and the barena. As you see, the waves have shrunk the barena, so the large pilings are only sort of symbolic. As a bonus, we see the remnants of the wall of smaller pilings which was installed to prevent any further erosion of the barena.
The distance between pilings and barena here is just another of many examples of the very simple effect of waves.
The distance between pilings and barena here is just another of many examples of the very simple effect of waves.
I remember when this channel was only half this wide.  Most of these boats belong to people from the mainland who come all this way so they can just sit.  Lovely, admittedly, but they bring waves and take away part of the lagoon when they go home.
I remember when this channel was only half this wide. Most of these boats belong to people from the mainland who come all this way so they can just sit. Lovely, admittedly, but they bring waves and take away part of the lagoon when they go home.
IMG_2008 barene compIMG_1956 barene comp
IMG_1955 barene comp
IMG_2009 barene comp
Tourist launches of all sizes offer day trips around the lagoon.
Tourist launches of all sizes offer day trips around the lagoon.
Taxis are always in a hurry, especially on airport runs.  (Photo: Italia Nostra)
Taxis are always in a hurry, especially on airport runs. (Photo: Italia Nostra)
Ordinary working barges at Sant' Erasmo on a Sunday afternoon.  Their owners are almost certainly out in smaller motorboats, but tomorrow it will be back to work with all of these.
Ordinary working barges at Sant' Erasmo on a Sunday afternoon. Their owners are almost certainly out in smaller motorboats, but tomorrow it will be back to work with all of these.
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Motondoso: Suck it up

The dynamics of waves aren’t so hard to understand — anybody who’s ever gone to the beach remembers the thump of the wave that has just arrived.   (Am I the only person who’s ever noticed how much that sound resembles the slamming of the car doors as your  family arrives for a visit?).

We don’t really notice what the thump does to the sand because an infinite series of  them has  already created the sand.   It’s not a bad idea, though,  to recall that the sand was once a hefty piece of mountain.

What isn’t so obvious, and maybe is even less obviously disturbing, is the hissing sound the wave makes as it departs.   It is caused by a force called “risucchio,” (ree-SOOK-yo)  which literally means “re-sucking,”  though I suppose “undertow” is close enough for Anglophones.   And it’s the force that tears asunder what was once clearly put together by God, man, or whatever’s in between.

This is the ferryboat which carries wheeled vehicles to and from the Lido.  When it approaches the landing stage, the captain throws the engines into reverse to slow and stop the boat, then keeps the engines grinding in reverse in order to maintain tension on the lines.  This is considered necessary for safety.  The result is an impressive vortex of spinning water..
This is the ferryboat which carries wheeled vehicles to and from the Lido. When it approaches the landing stage, the captain throws the engines into reverse to slow and stop the boat, then keeps the engines grinding in reverse in order to maintain tension on the lines. This is considered necessary for safety. The result is an impressive vortex of spinning water..
Cruise ships create the same effect when they are maneuvering out of their berth.  Here, the TK Princess is on its way.  In high season there can be as many as seven cruise ships in the Maritime Zone; although they don't create waves, the force of their engines here has gouged a crater TK feet deep.
Cruise ships create the same effect when they are maneuvering out of their berth. Here, the "Ruby Princess" is on its way out. In high season there can be as many as seven cruise ships in the Maritime Zone.

Even natural waves caused by the wind, aided and abetted by the retreating tide, will do some of this work of demolition.   But then there are the big public boats — and I’m thinking specifically of waterbuses.   They come in several versions here, but the highest number are the vaporettos.

A standard vaporetto.
A standard vaporetto.

The vaporetto is a specific type of boat, and the public-transport company, which goes by its acronym ACTV, operates 52 of them.   Sometimes called “battello,” the vaporetto  has a regularly scheduled cousin correctly called a “motoscafo,” though it gets called “vaporetto” too for convenience.   It sits lower in the water and carries fewer people, though you might not believe it if you try to get on one at rush hour.

A motoscafo.
A motoscafo.

At this moment, the ACTV website informs us that the company operates “about 152” waterborne vehicles.   (“About”?   You mean you don’t know?)   They break it down  thus: 52 vaporettos, 55 motoscafos, 10 “single agent motoscafos,” which I can’t interpret for you just now, 16 bigger  vaporettos that travel the lagoon  (“vaporetti foranei”), 9 motonavi, and  8 ferryboats.

A motonave.
A motonave.

Naturally all of these  vehicles cause waves, but what compounds the effect is the undertow they create when they stop at one of the 100 or so bus stops (city and lagoon) to drop and pick up passengers.

It’s pretty simple.   Here is an illustration of what  happens every time one of these craft comes and goes:

The vaporetto approaches the next stop.  The captain may not have noticed whether is going with or against the tide; if he's going with it, he'll probably arrive faster than he meant to and have to hit the reverse really hard to break the momentum and get back into position to tie up.
The vaporetto approaches the next stop. The captain may not have noticed whether he is going with or against the tide; if he's going with it, he'll probably arrive faster than he meant to and have to hit the reverse really hard to break the momentum and get back into position to tie up.
He reverses the engines to stop the boat; the mariner throws a rope and ties the boat to the dock.
He reverses the engines to stop the boat; the mariner throws a rope and ties the boat to the dock.
The captain revs the engine in order to bring the boat parallel to the dock.  The water shows the effect of the earlier reverse and the momentary forward.
The captain revs the engine in order to bring the boat parallel to the dock. The water shows the effect of the earlier reverse and the subsequent forward.
To keep tension on the line while loading and unloading passengers, the captain keeps the engines at a very high rate of rpm's.
To keep tension on the line while loading and unloading passengers, the captain keeps the engines at a very high rate of rpm's.
Everybody aboard; the mariner unties the boat and the captain begins to reverse again.  This will give him the necessary momentum to get moving forward again.  Sounds strange, but that's how it works.  So: Back we go again.
Everybody's aboard; the mariner unties the boat and the captain begins to reverse again. This maneuver enables him to turn the boat slightly to starboard, which puts him the ideal position to throw the gears into "forward" and move on to the next stop. So: Back in reverse we go.
And wham!  We're starting to move forward again.
And wham! We're starting to move forward again.
And off we go. On to the next stop, where the same sequence of maneuvers will be repeated. If this looks even slightly disturbing out here in the open water, imagine it happening virtually constantly all along the Grand Canal. All day.
And off we go. On to the next stop, where the same sequence of maneuvers will be repeated. If this looks even slightly disturbing out here in the open water, imagine it happening virtually constantly all along the Grand Canal. All day.
Trailing clouds of glory in our wake.
Trailing clouds of glory in our wake.

On September 15, 1881, the first vaporetto (“Regina Margherita”) began regular service in the Grand Canal.   The imminent arrival of this creation caused tremendous distress and revolt among the gondoliers, who foresaw their doom.   Their turmoil is the focus of a marvelous film, “Canal Grande” (1943), starring several then-well-known Venetian actors, such as Cesco Baseggio, plus a number of real gondoliers.   Too bad it’s all in Italian.

The first vaporetto was soon followed by  a fleet of eight, run by a French company, the “Compagnie des bateaux Omnibus.”   Nothing against that noble nation, I merely note that Napoleon Bonaparte, who conquered and devastated Venice in 1797, was also French.

In 1890 the Societa’ Veneta Lagunare began service between Venice and assorted lagoon locations.   And so it has gone.

Lino remembers when there were still very few vaporetto stops  in the Grand Canal; they were at San Marco, Accademia, San Toma’, Rialto, the railway station, and probably Piazzale Roma, though he won’t swear to it.   In what was still a flourishing local culture, the Venetians could find almost everything needed for daily life in their own little neighborhoods.

This is a bus stop, essentially a dock called a "pontile," to which the vaporetto is tied while exchanging passengers.
This is a bus stop, essentially a dock called a "pontile," to which the vaporetto is tied while exchanging passengers.

There are now 17 stops on the Grand Canal.   They were not installed as something useful to the residents, as noted above, but for the transport of tourists.   Shops have begun to close (I don’t lay this fact at the feet of the wave-and-sucking-causing public transport), so as the population has dropped, and the number of tourists has risen, the locals have had to range further afield to find forage, so to speak, and at the same time have had to use public transport which is usually overstuffed with tourists and their luggage.   During Carnival, most Venetians do their utmost to stay the hell at home.

The city recognizes that  there aren’t enough vaporettos most of the year; during the summer (and Carnival) extra routes and supplementary vehicles are laid on.   But eventually some crisis point will be reached where the number of bodies requiring to be moved and the available space in which to do it will collide.   To use a term which nobody in the navigation business wants to hear.

Zwingle’s Fifth Law states that “You can get used to anything.”   You may quibble, but I can attest that you can definitely get used to this roiling and churning and sucking of many waters.   This isn’t good, but neither can you travel all day in a constant state of rage and anguish.

You can give yourself an interlude of relief by going for a little stroll.   Ignoring the roaring of motors and the shattering of waves, you can really relax in the city which is extolled for having no cars.   I think people who say that must  merely mean  “no traffic.”

Before too much longer, the Grand Canal is going to resemble Runway 3 at O'Hare.
Before too much longer, the Grand Canal is going to resemble Runway 3 at O'Hare. At the moment, it's only like I-95 from Washington to Richmond.
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Motondoso, Part 3: The How

“Motondoso” has very clear, and essentially simple, causes and effects. Anything moving in water, even eels, will create some kind of wake. The wake is the visible, surface part of the turbulence made by whatever is moving — in the present case, the motor’s propellers. The waves spread out in two directions until they dissipate.

In the case of motorboats in Venice, this fact is exacerbated by:

If it floats, it has to have a motor.  This appears to be the only rule that is universally obeyed.  This is an increasingly common scene in the Grand Canal.  (Photo: Venice Project Center)
If it floats, it has to have a motor. This appears to be the only rule that is universally obeyed. Here is an increasingly common scene in the Grand Canal. (Photo: Venice Project Center)

The number of boats:   There are thousands of registered boats in the city of Venice. There are also many which are unregistered. This number spikes every year in the summer when trippers from the hinterland come into the lagoon to spend their weekends roaming around, often at high speed but always with many horsepower, in motorboats of every shape and tonnage. Teenage boys, particularly  from the islands (by which we mean Sant’ Erasmo, Burano, Murano, are especially addicted to roaming at high speed at all hours with their girlfriends and boomboxes.

On a Sunday in July  a few years ago, a squad of volunteers from the Venice Project Center spread out at observation posts across the lagoon, from Chioggia to Burano. Their mission was to count the number and type of boats that passed their station. Whether it was a million boats passing once or one boat a million times, it didn’t matter. They came home with quite a list: every kind of small-to-smallish boat with motors ranging from 15 to 150 hp, hulking great Zodiacs, large cabin cruisers, ferries, vaporettos, tourist mega-launches, hydrofoils from Croatia, taxis, and more. After 11 hours, from 8:30 AM to 7:30 PM, they   analyzed their data. Result: A motorboat had passed somewhere, on the average, every one and a half seconds.

And if weekday traffic is heavy, weekend traffic is three times greater.

The types of boats: In the last 20 years, motor-powered traffic has doubled; at last count 30,000 trips are made in the city every day; 97 percent of these trips are in boats with motors. (There are currently 12 projects in the works for marinas which will add 8,000 more berths.) Of these 30,000 trips, a little  over half are made by some sort of working boat.  

More than 10,000 daily trips are by taxis or mega-launches, and more than 8,000 are by barges carrying some kind of goods (bricks,  plumbing supplies, cream puffs, etc.).   Studies have shown that if there is one category that over time causes the most damage, it’s not the taxi (I would have bet money on that).   It’s barges.   And they are everywhere.   It’s all barges, all the time.

 

This is the milk truck.
This is the milk truck.

 

Appliances and furniture.
Appliances and furniture.

 

 

 

 

 

 

 

 

There have always been large heavy boats moving materials in Venice, but when they were propelled by oars, the backing-and-forthing needed to negotiate spaces and corners didn't involve creating heavy vortexes of water.
There have always been large heavy boats moving materials in Venice, but when they were propelled by oars, the backing-and-forthing needed to negotiate spaces and corners didn't involve creating heavy vortexes of water.
When a heavy boat runs into a wall, it can leave quite a calling card. Here is a popular place to tie up your barge while unloading cargo. Who did this? Everybody and nobody.
When a heavy boat runs into a wall, it can leave quite a calling card. Here is a popular place to tie up your barge while unloading cargo. Who did this? Everybody and nobody.

 

Toilet paper, detergent, and other household supplies come ashore with the flick of a few buttons. Life is good, unless you're an old and fragile city.
Toilet paper, detergent, and other household supplies come ashore with the flick of a few buttons. Life is good, unless you're an old and fragile city.
I know they're heavy, but all this boat to carry a few watermelons?
I know they’re heavy, but all this boat to carry a few watermelons?

 

 

 

 

 

 

 

 

This is a peata, the mega-barge that built and maintained Venice well into the 20th century. It was usually rowed by two people, with one of them also at the tiller. And we require motors to do the same thing because we have to have speed.
This is a peata, the mega-barge that built and maintained Venice well into the 20th century. It was usually rowed by two people, with one of them also at the tiller. Now we require motors to do the same thing because we have to have speed.
These men knew and understood the lagoon, its tides and currents and winds, as no one ever will again, and they exploited them rather than fighting against them.
These men knew and understood the lagoon, its tides and currents and winds, as no one ever will again, and they exploited them rather than fighting against them.

 

 

 

 

 

 

 

Traffic patterns: The problem isn’t merely the number and type of boats, but where they are.   Obviously, the more boats you have, the more waves they will create, and where space is limited (most canals in Venice) these waves quickly accumulate into a roiling mass that dissipates with extreme difficulty.   They are forced to go back and forth, hitting anything they come into contact with, until they finally wear themselves out and die.  

There are canals where the waves don’t expire for hours: the Grand Canal (unfortunately), the Rio Novo, the Rio di Noale, the Canale di Tessera toward the airport, the Canale delle Fondamente Nuove, and above all, the Canale della Giudecca.

This map makes it clear why the Giudecca Canal is fated to carry virtually every boat that wants the shortest route from the Maritime Zone/Tronchetto to and from San Marco.
This map makes it clear why the Giudecca Canal is fated to carry virtually every boat that wants the shortest route from the Maritime Zone/Tronchetto to and from San Marco.

This broad, deep channel has become Venice’s Cape Horn. It is a stretch of water 1.5 miles long [2 km] and 1,581 feet [482 m] wide, and is the shortest and fastest way to get from the Maritime Zone (cruise ship passengers, tourist groups from buses at Tronchetto, barges delivering goods of every sort) to the Bacino of San Marco. One study revealed that the biggest waves in the Lagoon are here; an even more recent survey, conducted with a new telecamera system installed by the Capitaneria di Porto, provided some specific numbers: 1,000 boats an hour transit here, or 10,000 in an ordinary workday.   In the summer, there are undoubtedly more, seeing that an “ordinary workday” includes masses of tourists.

One reason there are so many  boats  is due to the large number of barges, rendered necessary by an exotic system for distributing goods. If you are a restaurant and need paper products, they come on a barge. If you need tomato paste, it comes on another barge. If you need wine, it comes on another barge. In one especially busy internal canal, the amount of cargo and number of barges was analyzed, and it turns out that the stuff on 96 barges could have fit onto three.   But never forget the fundamental philosophy: “Io devo lavorare” (I have to work).

The types of boats: Their weight and length. The shape of their hulls. Their motors (horsepower and propeller shape). All these factors influence the waves that they create.

A number of intelligent and effective changes have been proposed over time, most of which that  would not be particularly complicated, but which would cost money.   So far no one has shown that they consider these changes to be  a worthwhile investment.

Example: The original motor taxis (c. 1930), apart from being smaller than those of  today, positioned their motors in the center of the boat. When the hulls (and motors)  became larger, everyone moved the motor to the stern, which immediately creates bigger waves.   But subsequent improvement in motors and their fuels means that today it would be feasible to maintain the current size of the taxi while moving the motor to the center once again, thereby  immediately minimizing its waves.  Feasible, but no one is interested.

Boats this large made of metal may be necessary for certain kinds of heavy labor, but they are hazardous to the city's foundations not only because of the damage they can cause if they run into a building or fondamenta.  The force of their motors during maneuvers, especially at low tide, really scour out the canal sediments, which are either carried away by the tide (potentially weakening foundations) or pushed up against the underwater walls of buildings which easily block sewer outflows.  Blocked sewers cause accumulations of corrosive chemicals inside the building walls, which eventually also damage the structure.
Boats this large made of metal may be necessary for certain kinds of heavy labor, but they are hazardous to the city's foundations. Although they don't create noticeable waves in the smaller canals because they are going slowly, they contribute to the wave damage in several ways. One is by the chunks they take out of walls if they mistake a maneuver, thereby opening the pathway to waves from smaller boats. Another is the force of their motors during maneuvers, especially at low tide, which can suck the earth out from under the sidewalks. Or the force can push the canal sediment up against the underwater walls of buildings where they plug up sewer outflows. Blocked sewers cause accumulations of corrosive chemicals inside the building walls, which eventually also damage the structure.

Speed: This is utterly fundamental. Speed limits were introduced in 2002 to confront the already serious problem of the waves; the average legal range, depending on what canal you’re in, is between 5-7 km/h. But tourist mega-launches, barges, taxis — almost every motorized boat in Venice has the same need: To get where they’re going as quickly as possible.  

This need has been imposed by the demands of mass tourism, which involves moving the maximum amount of cargo (people, laundry, bottled water, etc.) often many times during the day. Everyone makes up a timetable which suits them and then makes it work.

Studies by the Venice Project Center have revealed several speedy facts in crisp detail.

  1. The height of the waves increases exponentially as speed increases. A small barge traveling at 5 km/h would produce a wake about 2 cm high. The same boat going at 10 km/h produces a wake of nearly 15 cm. (Multiply the speed by 2, multiply the wake by 7.)
  2. Virtually all boats exceed the speed limit. The average speed on all boats in all canals was 12 km/h, which is more than 7 km/h over the maximum speed limit.
  3. Therefore, reducing the speed of the boats would drastically decrease the size of their wakes.

Speed limits would have a positive effect (if they were obeyed) but only if certain laws of hydrodynamics were taken into account, such as the one governing the wake produced relative to the weight of the boat. Here the speed limits have been adjusted to permit the vaporettos (waterbuses), among the heaviest daily craft, to go — not slower, which would be correct — but as fast as the timetable requires.

You can change the laws on speed limits all you want —  you’ll never change the laws of physics.  

Oh yes: there will be waves.

Next:  Part Four: The lagoon experience

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