Acqua Alta All Over Again

Steve's picture

Yogi Berra, the pithy catcher for the New York Yankees, once quipped “It’s like Déjà vu all over again.”  Today’s story might rightly seem like “Déjà blog all over again.”

In two earlier entries

I explained how resonance can amplify ocean tides and I grounded the subject in Venice’s ‘Acqua Alta’.  Both Venice and tidal resonance merit a revisit. 

As for Venice, several factors contribute to increasingly severe floods apart from tides: global sea level rise, local subsidence and compaction, and seasonal ‘storm surge’ effects of wind and low pressure.

As for resonance, other places make Venice’s 1.5 -2 meter tidal range seem timid. The prequel blog already mentioned the Gulf of Gabes on the North African coast with its 3-4 meter tides. Far more spectacular examples exist.  England’s Bristol Bay hosts a 13 meter range. Nova Scotia’s Bay of Fundy however, wears the champion’s belt seeing high and low waters that differ by 17 meters. Considering that the tidal range in the absence of resonance would be about 70 cm, it is hard to imagine making a bell that responds so perfectly to its clapper as does Fundy’s.

A last mention goes to China’s Hangzhou Bay. As tidal flows squeeze into the Bay, a tidal bore forms on the Qiantang River effectively creating a twice daily tsunami several meters high that runs for miles up river. The bore has been a tourist attraction for one thousand years. in all that time, like at many wild natural attractions, over confident tourists regularly meet fatal consequences. Let’s just say that the Qiantang Bore makes Venice’s Acqua Alta look like a spring shower.

In a final nod to Yogi and employing the blogger’s universal disclaim, “I really didn’t say everything I said.”

Steven N. Ward   Santa Cruz


DorothyLewis's picture

These content and picture are showing the construction of the bicycle. The manufacturing of the cycle is very touched and each part needs special attention. Some of the parts special need cool custom essay the attention of the human and cannot be done on the machines.

music23's picture

It can be all the way great to have the musically free fans to be generated for your account here. All the likes and crown would be credited to your account shortly.

yadav_jeet's picture

Considering that we are Roblox gamers too, we were simply fed up with the high prices for Robux which is the blood line of this fantastic game specifically if you have a free subscription, it could be sluggish and rather irritating to collect some free robux.

Isabel00's picture

Good information Nova Scotia sea and i don't any information about this kind of sea. Now i have decided to have complete information about all seas of the world. While doing it i got from this approach and i actually want to get reviews of but this will be really effort for us. Thanks for it and keep it up.

Risk Alert