Steve's picture

Vaiont Flood Disaster - No “Damn” Break

I’ve blogged previously about the hazards associated with dam-break floods. A curious case is the 1963 Vaiont Flood Disaster. In just minutes on one autumn evening, 20% of the water (30 million m3) held in Vaiont reservoir spilled out.  What’s the curious aspect about the affair?  -- This was no dam break! In fact, the dam still stands intact today.   Puzzled?  Then read on.

Steve's picture

Seismic Slosh: Swimming Pools and Fish Tanks.

I’ve blogged before about reservoirs where I considered their ultimate hazard, -- complete dam failure. Other, less catastrophic hazards associate with them too. One is seismic slosh. “Slosh happens”  -- I’m told --  whenever a standing body of fluid gets shaken from below. Recall that fancy dinner party when soup was just served? Someone (I still claim that it wasn’t me!) bumped the table leg and many bigwigs watched bouillabaisse elope from their bowls. 

Steve's picture

Hurricane Storm Surge: Double Dose of Trouble

Previously, I blogged about hurricane wind hazard. Everyone knows however, that hurricanes pack a double dose of trouble -- wind and storm surge. Surge is a temporary increase of local sea level associated with the storm. In essence, the ocean turns into a river flowing inland. A disastrous prospect if you or your property stand in the way.

Steve's picture

Earthquake Simulators - Ready for the 11 O’clock News?


We’ve all tuned into the 6 or 11 o’clock TV news to catch the weather forecast. Is that storm going to hit? Maybe I should cancel my round of golf. Is a freeze likely tonight? I’d better cover the roses. Will tomorrow be a scorcher? Perhaps I get in that family beach trip. 

Steve's picture

Hurricane Wind Forecasting (1) - What and How?

Hurricanes are one of the most damaging natural hazards that exist. While we can’t stop hurricanes from happening, we can take steps to mitigate their consequences. To formulate a balanced mitigation program however, we need a hazard forecast.

john's picture

Tornado in Massachusetts

Yesterday the city of Springfield Massachusetts was struck by a tornado.  Four persons lost their lives, and damage was substantial.  Videos of the event are dramatic.  Tornadoes are another example of the vagaries of mother nature, along with earthquakes, tsunamis, and hurricanes. 

Steve's picture

Tsunami - San Francisco

After seeing all the dramatic footage of devastation from the March 2011 tsunami in Japan, anyone living near an ocean coastline wonders, “What if that happened here?”

Fortunately, by means of computer simulation we don’t have to wait for the real thing to glimpse an answer.

For illustration, imagine a five meter high tsunami wave, 26 km across heading toward the San Francisco Bay Area from the west.  How would the Pacific Coast fair? How much of the wave penetrates through the Glolden Gate?

jrholliday's picture

Kansas City Star: Tornado response shows it's time to re-think the way we run America

An editorial in the Kansas City Star yesterday makes some interesting points about responding to short-term disasters, preparing for long-term disasters, and problem of money.


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