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This is Scientific American 60-Second Science. I'm Cynthia Graber. Got a minute?

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Want to know where and when the next major river flood will hit?

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Just look up, to the satellites.

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Conventional estimates of river volume come from rainfall, of course, and from measurement of the water that seeps from soil and groundwater reserves.

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But NASA's GRACE satellites, for Gravity Recovery and Climate Experiment, can pick up changes in the gravity field in a given river basin.

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The more water in the basin, the higher the gravity signal.

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Scientists used GRACE results from 2003 to 2012 to see if they could have predicted the 500-year flooding event in the Missouri River basin in 2011.

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Preceding the flood were two significant storms, record snow melt, saturated soils and particularly high groundwater.

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With GRACE data, the researchers found that they could have predicted the Missouri River floods months before current prediction models.

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They say that the technique could be used to forecast floods up to 11 months before such events take place in areas where snow melt or groundwater is a significant contribution.

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The research was published in the journal Nature Geoscience.

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Snow melt and major rain storms are predicted to increase with climate change.

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Which puts a premium on better flood prediction.

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Thanks for the minute, for Scientific American 60-Second Science. I'm Cynthia Graber.

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