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The ARkStorm 1.0 scenario describes an extreme storm that devastates much of California, causing up to $725 billion in losses (mostly due to flooding and erosion), and affecting a quarter of California's homes.
The 1862 flood has been used as a key data point in creating the "ARkStorm Scenario," originally projected as California's once-in-a-thousand-years catastrophic flood event, but now some ...
Despite worsening drought conditions, global warming has already doubled the odds that California will experience a catastrophic 'megaflood.'
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The United States Geological Survey has developed a hypothetical scenario, known as the "ARkStorm" (named for an atmospheric river event that has the likelihood of occurring once per 1,000 years), that would occur should a similar event occur in modern-day California.
The remains of the St. Francis Dam and reservoir floor, which killed more than 400 people after it failed in March 1928. All types of floods can occur in California, though 90 percent of them are caused by river flooding in lowland areas.
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Time of concentration is a concept used in hydrology to measure the response of a watershed to a rain event. It is defined as the time needed for water to flow from the most remote point in a watershed to the watershed outlet. [1]