Every year, with the coming of high spring and autumn tides, the sea surges up the Florida coast and hits the west side of Miami Beach, which lies on a long, thin island that runs north and south across the water from the city of Miami. The problem is particularly severe in autumn when winds often reach hurricane levels. Tidal surges are turned into walls of seawater that batter Miami Beach's west coast and sweep into the resort's storm drains, reversing the flow of water that normally comes down from the streets above. Instead seawater floods up into the gutters of Alton Road, the first main thoroughfare on the western side of Miami Beach, and pours into the street. Then the water surges across the rest of the island....Yet despite the outsized impact rising sea levels will have on the state, Florida's politicians not only ignore the potential damage, they deny the science and continue building. It is hard to get good drainage when the water is higher than the land. Just to note, 50% of all greenhouse gas emissions created by human activity have occurred since 1970, and annual output is increasing every year. We're only beginning to see the impacts of those emissions, and for Florida, a large percentage of the population and the real property will be severely impacted. Fools and their money...
Hence the construction work at Alton Road, where $400m is now being spent in an attempt to halt these devastating floods – by improving Miami Beach's stricken system of drains and sewers. In total, around $1.5bn is to be invested in projects aimed at holding back the rising waters. Few scientists believe the works will have a long-term effect.
"There has been a rise of about 10 inches in sea levels since the 19th century – brought about by humanity's heating of the planet through its industrial practices – and that is now bringing chaos to Miami Beach by regularly flooding places like Alton Road," says Harold Wanless, a geology professor at the University of Miami. "And it is going to get worse. By the end of this century we could easily have a rise of six feet, possibly 10 feet. Nothing much will survive that. Most of the land here is less than 10 feet above sea level."
What makes Miami exceptionally vulnerable to climate change is its unique geology. The city – and its satellite towns and resorts – is built on a dome of porous limestone which is soaking up the rising seawater, slowly filling up the city's foundations and then bubbling up through drains and pipes. Sewage is being forced upwards and fresh water polluted. Miami's low topography only adds to these problems. There is little land out here that rises more than six feet above sea level. Many condos and apartment blocks open straight on the edge of the sea. Of the total of 4.2 million US citizens who live at an elevation of four feet or less, 2.4 million of them live in south Florida.
At Florida International University, geologist Peter Harlem has created a series of maps that chart what will happen as the sea continues to rise. These show that by the time oceans have risen by four feet – a fairly conservative forecast – most of Miami Beach, Key Biscayne, Virginia Key and all the area's other pieces of prime real estate, will be bathtubs. At six feet, Miami city's waterfront and the Florida Keys will have disappeared. The world's busiest cruise ship port, which handles four million passengers, will disappear beneath the waves. "This is the fact of life about the ocean: it is very, very powerful," says Harlem.
Sunday, July 13, 2014
Miami Sees Effects of Climate Change, Yet Ignores It