The Great Wall of Japan is yet another dubious plan to concrete over much of the country’s coast for the LOVE OF CONCRETE™, grrr.
The Great Wall of Japan
—Tsunami protection–or a boondoggle for builders?—
The Economist.com | 2014 June 14
…Three years ago, an earthquake under the Pacific Ocean triggered towering waves that carried away over 18,000 people and caused a meltdown at the Fukushima Dai-ichi power station…
…Japan’s government wasted little time announcing a favourite solution: pouring concrete. A few months after the disaster it pledged to build hundreds of seawalls and breakers in the three worst-hit prefectures of Fukushima, Miyagi and Iwate. The total cost will be up to ¥1 trillion ($9.8 billion). More walls are planned. A report by the ministries of agriculture and land said 14,000km of Japan’s 35,000km coastline requires tsunami protection.
Seawalls are controversial. They look hideous and the evidence for their effectiveness is flimsy…in the city of Kamaishi a $1.6 billion breakwater, listed in the “Guinness Book of Records” as the world’s largest, crumbled on impact. Nearly 90% of existing seawalls along the northeast coast suffered a similar fate. Critics say they even resulted in greater damage being caused elsewhere. “There is simply no guarantee that seawalls will stop every single tsunami,” says Nobuo Shuto, an engineer at Tohoku University.
Environmentalists, surfers, and anybody sane hates these concrete seawalls and tetrapods because over time they cause all the sand on beaches destroying the beach habitat creating a concrete dead zone. The Japanese fishing industry is so stupid they don’t realize that by destroying the beach/coastal habitat they are further reducing the number of fish in their already over-fished waters, arrrg.
Previous 3Yen reports (since 2006) on this concrete problem include: