An unsung hero of the recent Dublin floods. Pollaphuca Dam

By The Helpful Engineer / On / In Technical & Discussion

Dublin floods. Weather radar for the 24th of November, showing rain fall and squall line over eastern Ireland and western Wales

Yesterday Dublin City and its surrounds were subjected to seriously heavy rainfall. A squall line dumped one month’s rain in the space of three and a half hours; 120mm of rain. This resulted in serious flooding which unfortunately caused the deaths of two people. One was an extremely brave off-duty police man who was sweep away when generously trying to warn traffic about flooded river bridge. The other was a young woman who was trapped in a flooded basement. A large suburban shopping centre at Dundrum was flooded as the result of a blocked culvert, and traffic chaos resulted with many roads becoming impassable. A friend said it took four hours to drive a journey that usually takes 30 minutes.

The main flooding was caused by blocked culvers, drains and small rivers overflowing. The main river in the area the Liffey did not flood to a significant degree because it has one large reservoir (and two small ones), which helped to contain most of the deluge.

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