ITALIA NOSTRA VENICE CHAPTER
Fig. 1. Please click on the image to enlarge it and read a comment.
Figs. 2 and 3. Damage to the intertidal zone (from “Il sistema della sponde” by Ivano Turlon et al., in Venezia la cittą dei rii, ed. by G. Caniato et al., published by Unesco, Insula Spa e Cierre Edizioni, Verona 1999,pp.101 - 129).
Figs. 4, 5, 6. Damage to the underwater areas.
Fig. 7. enlarging the image (with a click) you can see the web of cracks on this faēade (from Quaderni, op. cit., p. 68).
Fig. 8 Maintenance works on a canal bank. The water has been removed and the little tubes are used to inject grout in order to keep the stones together. One can only hope that this technology will resist the passing of time (from Quaderni, op. cit., p. 68).
Figg. 9, 10, 11.
The islands in the Lagoon are being reduced in size. The ripples on the water in fig. 9 are not natural
but caused by the passage of far-away motor boats. Normally the waters would be as
motionless as mirrors or, in presence of thermal breezes, very slightly rippled.
This used to be an essential part of the lagoon’s poetry.
** A positive by-product of the introduction of compulsory licence plates has been a realistic count of the number of crafts operating on the lagoon. It turned out that there are about 35,000 of them (which confirms with very good approximation the estimate of 30,000 previously produced by the environmentalist associations).
Figg. 12, 13 - From Insula,
Quaderni, N. 12, anno IV,
Fig. 14. Two tourist Launches (“lancioni“) in action (from Quaderni, cit. p. 13).
Fig. 15 . A cruising ship entering the St. Mark Basin. Please click on the picture to see an impressive series of images
Fig. 16 . Vaporetti on the Canal Grande (ibid. p. 6)
Fig. 17. “Mototopi” for the transportation of merchandise (ibid. p. 176)
Fig. 18. The transport of merchandise must share the canals with gondolas and taxis (ibid., p. 26).
Fig. 19.Garbage collection must also take place with boats (ibid. p. 35)
Figs. 20,21.Small recreational boats, which are also used as personal utility boats.
Fig. 22. One of the rare signs announcing the existence of a speed limit. In spite of the pressures of some citizens, the town adopted plain road-type signs, which appear rather ugly and awkward in the lagoon environment. This was apparently required by European water–traffic regulations.
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Motorboat Waves: The Impact on Venice and on Its Lagoon
A Ride on a Water TaxiIf, in Venice, you happen to take a ride on a water taxi to or from the airport or your hotel, we beg you to cast a look at the waves that are created at the stern of your boat and that smash against the buildings along the canals and against the grassy banks of the lagoon islands. You might wonder how a city can survive such a brutal treatment.
Maybe you’ll want to believe that no serious damage could occur: the Venetians must certainly know what they are doing.But no.Indeed you have found the core of a real, although hardly believable, paradox. Because, contrary to a widely spread belief, the greatest danger for the physical survival of the city of Venice is not in the high tides or floods caused by sea storms. The real and immediate danger derives from the impact of the waves generated by the propellers of the motor boats. On the surface, the waves smash against banks, houses and palazzi. What you cannot see from your taxi is that each blow takes away a small grain of stone or brick. The impact’s violence is in direct proportion with the cube of the wave’s speed (which in turn depends on the speed of the boat). This is the damage to the intertidal zone shown in figures 2 and 3 alongside of this text. About two feet under the surface, at the level of the propellers, the water’s backwash sucks in the cement of the foundations, slightly moves stones and bricks and creates the first cracks. Behind the stones there is no rocky terrain, there is the crumbly earth of the local islands. The water’s return after the impact carries a few crumbs away, and this is how the first caves are created under the streets and under the pavements of homes.Along the Canale della Giudecca, a very busy water highway, the pavement of the street along the canal suddenly caved in as a woman walked past. She fell into a hole nine feet deep.
The same thing happened to a man on the Riva dei Sette Martiri, the broad embankment near Saint Mark’s Square. Many tracts of flanking streets, especially in correspondence to the landing steps, have visibly caved in, because the ground under the pavement has become hollow. This damage to the underwater zone is described in illustrations 4, 5 and 6. It is repeatedly denounced by the local press. This is just the start. Once created by passing motorboats, the cracks inexorably creep upwards. The outside walls of the buildings are opening up. Some walls have already collapsed, thus launching a sinister alarm. In figure 7 we see an analysis of the state of a building fronting a canal. For more than a dozen years the local press has loudly denounced this situation. The national government is spending huge amounts for the so-called maintenance of the canals, which in reality is mostly the partial repair of the damages created by the backwash. The Special Law for the Safeguard of Venice pays the bills, while nobody seems to worry about the causes of the damage. And few people remember that a city restored is not the original city any more. Materials and building techniques are necessarily different from the original ones; the old stones are replaced with other stones; a recent technique, widely applied, calls for grout to be injected through a thousand tiny tubes in an attempt at consolidation. Little by little a copy of the underwater city is being built (see figure 8). Out in the lagoon the damages are even worse (figs. 9, 10, 11).
The typical grassy islands (locally called "barene", bah-reh-neh) are mercilessly eroded. During the last few years their total surface shrank form 70 to 40 square kilometres - by 2050, it is expected that they will have totally disappeared. A further problem is that the lagoon bottom gets continually stirred; this causes the release of sediment that is carried away by the tide and ends up in the open sea. As a consequence, weeds, herbs and fish disappear, the bottom gets levelled and the lagoon is transformed in a muddy extension of the sea, it becomes more and more uniform and deep, and more and more overrun by large, speeding boats. Finally, the aesthetic part. Ever since the motors appeared, little or no effort was made to restrain the drivers. As a consequence, the city is not the same as it used to be. It has lost a large part of its poetry. The stretch of water in front of Saint Mark’s Square is beaten, slapped and scoured by perennial waves. The lagoon flats, once motionless like magic mirrors, have become a hostile environment. Chunks of muddy, foamy waves incessantly pop up on every side. In order to find a moment of peace one’s gaze must be lifted towards the clouds or the sky. Only at four or five in the morning can one have an idea of the spirit of this ancient city, the way it used to be – and perhaps could be again. But with the new day more barbarians arrive to resume the absurd, incredible process of destruction. The government proclaims a State of EmergencyThe fact that Venice is facing an emergency is not just an impression of ours. It is under everybody’s eyes, and the national government has finally acknowledged it. In September, 2001, a decree by the Home Secretary announced a STATE OF EMERGENCY FOR VENICE AND ITS LAGOON DUE TO TRAFFIC-INDUCED BACKWASH. The decree didn’t attract much attention in the national media, but it was very welcome in Venice, where public intervention had been invoked for years. The announcement was accompanied by an exceptional step: the appointment of a Special Commissioner for Water Traffic. This was going to be an all-encompassing authority, temporarily replacing the five or six different offices supposedly responsible and which had been busy pointing their fingers at each other. And the Commissioner was endowed with exceptional powers. Italia Nostra could start to hope again. For almost ten years we had worked with other associations (mostly the Venetian Pax in Aqua, whose main goal is “contrasting the increase of wave damage in Venice and in its lagoon”, but also the WWF and other associations), in order to ask for new and better rules for water traffic in the lagoon. A little progress had been obtained before the appointment of the Commissioner, and this included:
With the appointment of a Commissioner we were entitled to expect some serious, efficient steps to be finally undertaken. But the government did not appoint, as was largely asked, a neutral outside authority, which could act super partes. It appointed the very same mayor of Venice, Mr. Paolo Costa, who was one of the parties responsible for the situation and, most importantly, subject to the electoral pressures of the economic groups which had to be regulated. The Commissioner remained in charge for four years and, incredibly, did not bring any improvement on the situation except for a very partial success in the Grand Canal. The reasons for this failure, and for the failures of many other “Special Commissioners” in Italy, were vividly exposed by the well known journalist Milena Gabanelli in an issue of her TV program “Report” which included some surprising and worrisome admissions by the Mayor-Commissioner Paolo Costa. After July, 2005, the power returned in the hands of the six authorities which had previously detained it, i. e.: City Hall, Water Authority, Harbour Authority, Financial Police, Carabinieri, Venice District Police. It must be pointed out that in this large number there is missing the one authority which perhaps should be more interested of all, i.e. the Monument Conservation Department (Soprintendenza ai Monumenti), the Director of which was obliged to admit to Italia Nostra that he has no means to intervene against this destruction of Venice’s monuments. The collapse continues and the destruction is increasing. The Mayor-Commissioner has spent a large part of his generous funds (fifteen million Euros according to our sources) for studies, conferences and consultants. But the ideas have remained on paper. In the lagoon and throughout the city’s inner canals, nothing has changed at all. Motor boats are now required to carry licence plates **, but there is no surveillance: in fact, the few controls are now focussed on bureaucratic details such as the positioning of the licence plate rather than on the boats’ speed, something less comfortable for the officers to check, and more controversial. Excess waves: causes and remediesTo find the remedies, we need to look at the use of motor boats in Venice. There are three basic uses:
1. Transportation of persons The number of licenced water taxis in Venice is 281. They have been able to condition the local administrations to the point of being allowed to freely destroy island banks and canals. No attempt has ever been made to limit the damages created by water taxis. Some steps, however, would be very obvious and very efficient. Among such steps would be:
There is no place in the lagoon where the allowed speed is higher than 20 kilometers per hour (about 12 miles). But the routine speed of taxis driving to the airport is between forty and sixty. The lagoon police wrote: “In particular in the canal leading to the airport the highest peaks of speed were reached by taxis, with measurements of up to 59 kilometers per hour, while in the inner city the highest measured speed was 46 k/h for a taxi and 70 k/ for a sports boat.” Let us not forget that the police data are very conservative because the pilots can identify police crafts from very afar and have the time to slow down. Water taxis are also known for warning each other in code through VHF transmitters. The large tourist launches are bus-sized motor boats specialized in the transportation of tourists from the bus parking lots (in the man-made island called Tronchetto, on the city end of the bridge from the mainland) to Saint Mark’s Square. Their number has grown in the last twenty years from a half dozen to 154 (counted on the base or their regular landings at St. Mark’s). Those are 154 large motor boats which every day run back and forth – in some cases dozens of times per day – without a precise schedule but depending on the demand. It is in their interest to cover the distance in a time as short as possible. Their hulls are designed for the open sea, not for the lagoon and their licences are granted according to criteria used for the open sea. No special attention is given to wave-producing factors: their large, heavy sterns or immensely powerful motors. They have made it impossible – or at least extremely dangerous – for small local
boats to cross the waters where they navigate. In particular, the waters surrounding the St. Mark’s
area have become the merciless home of high waves coming and going in all directions.
And this has damaged Venice: the two small towers near the Palladio church in the island of St. George (they were built during the Austrian domination in the early 19.th century) were slowly gliding into the water because of the backwash and had to be rescued with heavy maintenance work. There’s another threat: during the last ten years the traffic of the cruising ships has increased exponentially. Many of these ships can carry two to three thousand passengers a week. They are permitted to pass in front of St. Mark’s square and through the Canale della Giudecca, causing the displacement of immense quantities of water and enormous underwater pressure on the banks and building foundations, plus environmental and acoustic pollution and a serious danger of accidents which could damage the artistic patrimony. The largest ships, very close three hundred meters in length (289 to 294), must make a u-turn in a space by the diameter of 305 meters. From the city embankments, Venetians and tourists alike remain open-mouthed as they watch the surrealistic scene of those ships, many times as tall as the highest buildings, moving through the scene really like huge elephants in a delicate china shop. The cruising tourists get off the ships in the passenger harbour, from which they dart to the downtown shopping areas on board of hundreds of water taxis. The inner canals absorb the backwash and the town’s economy prospers – or is supposed to prosper. In the face of these threats, the gondolas traditionally moored in front of St. Mark’s Square had to be protected with temporary – and highly inelegant – breakwaters. Thus one of the most enchanting landscapes of the entire city lost a large part of its beauty. The local means of public transportation are the well-known “vaporetti”, bus-size boats whose hulls are relatively well designed. At small speeds they produce little or no surface backwash (under the water it cannot be avoided). But their public schedules have been wilfully decided without consideration of the standing time at the stops, for passengers to get in and out. Those times are very long, especially during high tourist season. As a consequence the drivers, in order to keep on schedule, are “obliged“ to speed as fast as possible between stops. The hulls were not designed for high speeds, so the backwash increases enormously. The local police accept this fact (the “close an eye“) and so the damages increase. 2. Transportation of Merchandise In the absence of specific regulations for lagoon waters, the structure of the cargo crafts underwent progressive adaptations without any respect for the natural or artistic environment. Today these boats (still called with the ancient name of “mototopi”) are similar to powerful battleships, merrily speeding through outer and inner canals, negotiating curves with powerful rear-gear action, blowing out clouds of polluting smoke, banging against bridges and against the corners of the buildings. The Mayor-Commissioner spent part of the funds from the national government to have a local boatyard build a prototype of a merchandise boat appropriate for Venice. This was done; the prototype was built and shown to the press. But it was never imposed nor even recommended, presumably because of opposition by the operators. This is one more example in the vast “Museum of Inefficiency” of the Venice Administration. Each cargo boat has its own customers and every day each goes back and forth through the Venice canals. By grouping deliveries by canal rather then by clint, there would be an economy of 50 to 80 per cent of the miles run. In order to do this Venice would need a Warehouse Storage Centre for the merchandise to be redistributed in the moment of its passage from truck or train to boat. This need is so obvious that it has been a top theoretical priority for over twenty years. The Commissione spent more funds to order a feasibility study from a German firm by the name of Transcare. He then proceeded, with enormous expenditure, to acquire a building for the future Centre. Works for the construction have now begun and it was promised that they will finish in 2009 (see clips from Il Gazzettino and La Nuova Venezia ), at a total cost of 30 million euros, all with public funds. Something more is needed, however: the operators have to accept the new approach. So far, the first attempts at agreement have failed. Actually, an exception has already been granted to a group of operators based in the lagoon bank at San Giuliano (at the mainland end of the lagoon bridge). They were promised separate headquarters in an artificial island. In the meantime the volume of the merchandise to be transported is steadily increasing, much of it in order to supply the tourist business, since visitors have grown from 8 to 19 million in a few years. Traffic jams of “mototopi” in the city canals are a constant feature. The windows of homes tremble because of the vibrations induced by their propellers. Window sills acquire the grey-black colour of combustion gases. The marbles of the monuments crumble apart. The boat drivers fight vocally for priority in passage and standing. The tourists take pictures, half surprised and half amused. 3. Recreational boats. The damages created by resident boat-goers happen especially out in the lagoon, where the young (but also quite a few not so young) race across the water for the fun of speeding. But even worse damages are created by the inhabitants of the mainland who keep huge speed boats
in the many marinas which have been allowed to operate inside the lagoon.
In the summer, and particularly during week ends, they cross the lagoon at high speed to reach the
open sea. They are the main cause of the erosion of islands and canal banks.
Their presence is making it impossible for the Venetians to keep the old tradition of Sunday
outings in the Lagoon, because their small family boats cannot face the waves created by those
giants. In particular, traditional wooden boats, built to be rowed or sailed, capsize easily when
caught in the weekend traffic. After the inefficient Commissioner years, the recreational use of
the lagoon is still in need of basic regulation.
(The image alongside this text is taken from the site of a Venice/s sailing association:
What Needs To Be DoneThe most important and urgent steps to be taken are as follows:
All those are common sense steps, which would not in the least damage the town’s economy (actually they would make its growth acceptable) and would help Venice to survive. Why they are not expressed, approved and enforced remains hard to understand. One can only think that the very minute interests of the individuals and firms operating in the areas of transportation (closely tied, of course, to the tourism business) were and still are capable of conditioning the city administrations of the last decades. What’s in StorageAs in the case of mass tourism, a correct management of lagoon traffic is strongly opposed by a myriad of small economic interests. Those are basically ill calculated, as in all cases of tragedy of the commons, where there is a perceived conflict between individual interests and the common good. In reality, a wise policy would provide economic benefits for all; but a further complication is the sudden creation of enduring structures such as the tourist launches: these monopolize the transportation of tourist groups from the bus parking lots to downtown Venice. The launches are here to stay, because 1) they represent important investments and 2) they are a source of immense profits. In a context like Venice and Italy it is virtually impossible at this point to reorganize them. The local political institutions have been incapable, or for electoral reasons unwilling, to regulate water traffic. Some faint signs of interest were exhibited only under the pressure of the associations of concerned citizens such as Italia Nostra, WWF and some rowing and sailing clubs. But it is reasonable to fear that nothing will seriously change unless the inhabitants are threatened in their direct and personal interests. This has started to happen: Venetians have begun to recognise the problems of air pollution, acoustic pollution and, more urgently, the weakening of the foundations and walls of the canal fronts. Italia Nostra must therefore keep putting pressure on the administrations, relentlessly reminding them of the absurdity and short-sightedness of the past policies. But the strongest hope lies in a coordination of the spontaneous initiatives of Venice’s inhabitants, including the new residents and the owners of second homes.
This image is from the site http://www.venessia.com. |