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Flood Protection Contest Winners Announced

From RebuildByDesign.org — Long Island Sound model

US officials in the Department of Housing and Urban Development have announced the winners of an international design contest aimed at generating fresh ideas to protect the coastal areas of New York and New Jersey. The top ten ideas were announced on November 14th, chosen out of a total of 41 plans submitted to the contest. Over 200 engineers and architects were involved in the project.

From RebuildByDesign.org — Long Island Sound model

The teams associated with the top ten winning ideas will now move into a new phase of the contest, in which they will create concrete models of their plan, and will in some cases use computer generated simulations to assess the viability of the plan.

Contest officials stress that the winning ideas may never be implemented in real life, but maintain that the contest is important to foment regional conversation about the drastic changes that may be necessary to hold off rising tides and large storms resulting from climate change.

The contest was funded in part by the Rockefeller Foundation, and is called Rebuild by Design. More information about the contest results for New York and New Jersey, as well as projects planned in other parts of the US, may be found here: RebuildByDesign.org.

A few of the top ten projects are:

  • Construction of canals and water-stopping parks in Hoboken, New Jersey. The green parks would be used for recreation purposes, but in the event of flooding would also act as natural sponges to soak up or safely divert floodwaters.
  • Breakwaters, using natural materials, would be built off Staten Island to buffer storm surges.
  • An eight-mile network of dikes and flood barriers, designed to be ringed around the perimeter of Manhattan Island. This project, known as The Big U, has particularly captured imaginations due to its breathtaking scope- and corresponding price tag!
  • Addition of green flood-absorption areas around the dock areas of the Bronx. This waterfront area is hugely important to the food distribution process- even more critical during times of natural disaster.
  • Conversion of current green parks and meadows into tidal zones. New development might be planned around these flood-absorbing zones.
  • Man-made barrier islands to stretch the entire length of the New Jersey coastline. This island could be oyster beds in order to add extra benefit to the flood barrier properties of the island.

Although these ideas may never come to fruition in the real world, many of the good ideas from the contest will serve to initiate regional cooperation and conversation about the very real threats facing coastal areas in the coming years.

Source: http://www.floodbarrierusa.com/

New Floodplain Maps for New Jersey Raise Concerns

In mid-June, FEMA released a new floodplain map for the State of New Jersey. As hard as it may to believe — particularly after the widespread and devastating floods brought by Hurricane Sandy — the official flood zone area has shrunk.

While some property owners may be celebrating this news, others are raising concerns about the interpretation of the data. Barry Chalofsky, who is the former chief of the New Jersey Department of Environmental Protection’s storm water and ground water programs, has deep concerns about the new maps.

Source: FEMA Region II Coastal Analysis and Mapping

Mr. Chalofsky is apprehensive about the fact that many properties in New Jersey have been downgraded as far as flood risk, even though the studies that created the new zones did not factor in variables such as sea level rise and changes in topography that resulted from Hurricane Sandy nine months ago.

In a recent op-Ed essay that was published by newjersey.com (http://www.nj.com/times-opinion/index.ssf/2013/07/opinion_nj_fema_flood_map_revi.html), Mr. Chalofsky enumerates the reasons for his alarm. First and foremost among Chalofsky’s list of concerns is the fact that the flood maps have been drawn based solely on historical trends and past flooding incidents over the past century, without factoring in changes that have occurred recently.

For example, Hurricane Sandy altered the topography of much of the Jersey shoreline; in some areas drastic topographical changes have occurred. These changes in the lay of the land will undoubtably influence future flooding events in ways that cannot be fully predicted. For this reason, past flooding events can no longer predict how floodwaters and storms will behave from now on.

In addition, the new FEMA maps do not account for sea level rise, which is increasing inexorably and measurably each year. In other words, while we know that there has been an increase in sea level of about nine inches since the 1920′s, we do not know at what rate the sea level will rise over the coming century. Scientists are not in agreement on the rate of increase, but it is universally accepted that sea level rise will easily exceed the historical rate.

Therefore, Chalofsky has voiced his apprehensions even as some property owners are celebrating reduced flood insurance costs. The danger, says Chalofsky, is that some of these property owners will be putting themselves at great risk if they choose to reduce or even forego flood insurance.

“I think the real risk is that we rely too much on the maps and decide that we are “OK” if we just build to the required standards”, writes Chalofsky. “My biggest concern is that this latest revision will create a false sense of security for those residents who are not required to elevate…”

As property owners now endure the so-called “100-year floods” with increasing frequency, climate change and its accompanying sea level rise continues unabated, and vast areas of the eastern shoreline has been changed by past hurricanes and super-storms, property owners are well-advised to heed their own common sense and prudence instead of the new FEMA maps. A property protected by elevation, flood barriers, prudent planning, and adequate flood insurance will be much better equipped to withstand the coming storms.

Source: http://www.floodbarrierusa.com/

Is Florida Planning Wisely for Rising Sea Level?

Flooding in Key West, Florida

Credit: FloydPhoto/Wikimedia Commons

Flooding in Miami and the Florida Keys was once an occasional, if very inconvenient headache. But in recent years, flooding has become a regular and increasingly frequent fact of life — one that challenges communities throughout the state.

This Thursday, May 2, 2013 file photo shows flooding on Duval Street in Key West, Fla. after roughly five inches of rainfall. In many sea level projections for the coming century, the Keys, Miami and much of southern Florida partially sink beneath potential waves. (AP Photo/The Key West Citizen, Rob O’Neal)

Studies have shown that the coastal areas of Florida have conceded about nine inches of land to the ocean over the past 100 years. However, that pace has accelerated, and it is predicted that the same coastline will lose 9 to 24 inches in the next 50 years. This is particularly alarming when one considers that many important features of the area’s infrastructure sits a mere 2-5 feet above sea level!

A full 40% of the flood risk zones in the US can be found in the state of Florida. Flood maps that project risk during the coming decades indicate a frightening future for the state, with much of the coastline underwater in as few as 30 years. Some maps show an alarming new shape for the future State of Florida, with as much as a third of the state submerged — all the way up to Fort Lauderdale!

Recent large storms such as Hurricane Sandy in 2012 and Hurricane Wilma in 2005 provided a wake-up call to citizens and developers. These storm events were a sneak preview of what certainly lies ahead for Florida. Each year there is a shrinkage of beaches and watersheds, and the oceanfront creeps closer. Global sea level rise means that the storm surges of today are much more destructive and powerful than ever before.

At the present time, there is no official, coordinated plan to save or protect Florida’s coastline. When new developments are planned, no one knows if the construction will be protected by public works projects in the future, or if the land that is being built upon will be underwater in the coming years. Currently, new projects tend to be planned with flooding in mind, using elevation of the lot, natural flood barriers, or integrated flood panels. But the scope and reach of sea level rise may be beyond what is being planned for.

As an example, when planners began working on blueprints for a new fire station on Stock Island, which is located in the Florida Keys, they decided to build up the foundation a full nine feet in order to help protect it from inundation. This added greatly to the expense of the project, which is hovering around $4 million. But even these seemingly extreme precautionary measures may not be enough to hold back the sea 30 years from now.

As the City of New York implements its ambitious $20 billion plan to help reduce flood and storm threats, the State of Florida lags far behind. Without a coordinated and planned approach, it is likely that Florida will suffer greater losses than is strictly necessary. But even with the best of planning, the future of Florida looks very precarious.

Source: http://www.floodbarrierusa.com/

$20 Billion Plan to Protect New York from Floods

New York plans to invest $20 billion in flood protection measures

As we have discussed in a previous post, vast new swaths of New York and New Jersey have been added to official flood zone maps. This means that these areas now require flood insurance for businesses and homeowners, and rates for this insurance are expected to rise precipitously in the coming years. But no amount of expensive flood insurance can prevent flood disasters- for that, planning and preventive measures must be implemented.

In early July, New York Mayor Michael Bloomberg announced an ambitious $20 billion plan to put into place flood protection devices and barriers that are designed to save the city from the next Hurricane Sandy. The plan is an extremely aggressive and forward-thinking proposal to shield the city from the effects of global warming.

The plan incorporates many different types of flood protection measures, including removable flood barriers, levees and floodgates, and the construction of flood barriers from natural materials such as sand dunes to deflect furious storms and winds from low-lying areas. Marshes would be added in specific areas to absorb and channel water in ways that are less destructive to surrounding communities.

Hospitals, fire stations, police departments, and clinics in at-risk areas would be flood-proofed under Bloomberg’s plan. During the Hurricane Sandy emergency, many of these critical services were themselves inundated, and were unable to assist the community. Homes in severely threatened areas will also be flood-proofed.

Removable flood walls are a central part of the plan to protect Manhattan. These flood walls will consist of posts and flood panels that would be put into place in advance of a big storm. This approach has been used successfully in other parts of the world, including the Netherlands. The obvious disadvantage of this device is that it must be manually erected before the storm, unlike automatic flood panels that are being used in many other flood-prone properties.

Mayor Bloomberg, in a speech at the hard-hit Brooklyn Navy Yard, emphasizes that the proposed work will takes many years, and even decades to fully complete. But he envisions a city that will one day be able to withstand the extremely severe hurricanes that undoubtably loom in the future.

Bloomberg’s plan is being funded by a variety of sources, including relief funding from Hurricane Sandy, federal grants, and a proposed surcharge on property insurance from all homeowners in the area. In addition to the protection of infrastructure and emergency services, grants will be available for individual property owners to flood-proof their homes and businesses.

This ambitious flood protection plan is being widely praised for its forward-thinking ideas and efforts to prevent future disasters. However, not everyone will be pleased with the coming changes, as some flood barriers will block ocean views and may not be aesthetically pleasing in some cases. But most residents who lived through the Sandy disaster will surely welcome the protection, even if it means sacrificing a pleasant vista.

Source: http://www.floodbarrierusa.com/

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