After the horrific tsunami hit Japan in 2011, officials have been attempting to think up ways to protect areas from flooding. It’s obviously really expensive to implement an entire new infrastructure, but researchers at Kyoto University and Hitachi Zosen Corp. have made a cheaper option that looks promising. It’s a new floodgate that raises and lowers based on the water level, and it does it automatically without sensors or any electricity — it’s powered by mother nature.
via Slash Gear
