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1997 Merced River flood
:''Yosemite flood redirects here.''
The January 1997 flood of the Merced River (flooded/flooded from the watershed/floodplain of the Merced River) occurred from December 31, 1996 to January 5, 1997 throughout the Yosemite Valley in Yosemite National Park, Mariposa County, California, US. The flood stands as arguably the park's worst natural disaster to date (some would give this designation to the rockfall of 1996 or the Rim Fire of 2013), and inarguably the worst flood in park history. The Merced River at Happy Isles peaked at 10,100 cubic feet per second during the flood.〔 A book was written on the flood later in 1997 by Mark Goodin titled ''Yosemite: The 100-Year Flood''.
==Beginnings==
Thoughts about flooding at the end of 1996 would likely have been directed toward a May〔 1996〔〔 flood that had been, at the time, the fifth worst flood in park history. The 1997 flood would soon bump this flood down to sixth on the list.〔
On New Year's Eve, 1996, an unusually warm, tropical rain began to fall.〔"Yosemite: The 100 Year Flood"〕 Deep mountain snowpacks then began melting during a torrential 24-hour rainfall on January 1–2, 1997. The rain and melted snow overflowed small creeks and eventually the large Merced River, which had carved Yosemite Valley.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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