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1 .This is Scientific American 60-Second Science. I'm Cynthia Graber. Got a minute?
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2 .Want to know where and when the next major river flood will hit?
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3 .Just look up, to the satellites.
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4 .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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5 .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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6 .The more water in the basin, the higher the gravity signal.
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7 .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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8 .Preceding the flood were two significant storms, record snow melt, saturated soils and particularly high groundwater.
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9 .With GRACE data, the researchers found that they could have predicted the Missouri River floods months before current prediction models.
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10 .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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11 .The research was published in the journal Nature Geoscience.
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12 .Snow melt and major rain storms are predicted to increase with climate change.
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13 .Which puts a premium on better flood prediction.
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14 .Thanks for the minute, for Scientific American 60-Second Science. I'm Cynthia Graber.
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