Lessons from a Flash Flood in Tehran Subway, Iran
نویسندگان
چکیده
On 15 April 2012 at around 13:00 local time, following a heavy rainfall in Tehran, a break in the channel wall of Kan River caused a flash flood in the Tehran metro tunnels. Consequently, line 4 of the metro went out of operation for about two weeks 1 . The flood was running for 30 hours in the metro system so that three stations were flooded causing damage to four trains and 28 wagons 2. It is estimated that approximately one million m3 of water and debris rushed in the metro tunnels through the break. Although this flash flood caused property damage of about $21 million (at the official exchange rate) to the metro especially its electrical system, fortunately no death and injury ensued 1,2,3,4 .
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