1. Posted on 21 November, 2012

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    Reblogged from kqedscience

    kqedscience: Plugging Up a Subway Tunnel “Engineers have developed enormous balloon-like plugs for placement at key points in subway tunnels. Once inflated, the plugs could hold back floodwaters and reduce storm damage.” View in High-Res

    kqedscience:

    Plugging Up a Subway Tunnel


    “Engineers have developed enormous balloon-like plugs for placement at key points in subway tunnels. Once inflated, the plugs could hold back floodwaters and reduce storm damage.”