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Slideshow · Viral

Why Some American Rivers Rise Faster Than Others

From steep limestone canyons in Texas to snow-choked valleys of the northern plains, explore how basin topography, storm tracks, soil conditions, snowmelt, floodplains, and real-time USGS gauges deter

9 min ago

6 Min Read16 Slides
  1. Floodwaters of the Potomac River rushing past Virginia overlooks at Great Falls after Hurricane Ida
▼ Visual Countdown

Floodwaters from the remnants of Hurricane Ida roar through the rocky gorge of the Potomac River at Great Falls in September 2021. Across the United States, how fast a river rises depends on basin slope, rainfall intensity, soil saturation, snowmelt, floodplain storage, and real-time stream monitoring.

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©Wikimedia / G. Edward Johnson

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