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科学美国人60秒:预测洪水的方法-托福听力下载

2017-01-16 18:17:40来源:科学美国人60秒

点击查看>>科学美国人60秒音频:预测洪水的方法

  科学美国人60秒中英文翻译:预测洪水的方法

  科学美国人60秒英文文本

  This is Scientific American 60 Seconds Science. I'm Cynthia Graberc. Got a minute?

  Want to know where—and when—the next major river flood will hit? Just look up, to the satellites.

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

  But NASA’s GRACE satellites, for Gravity Recovery and Climate Experiment, can pick up changes in the gravity field in a given river basin. The more water in the basin, the higher the gravity signal.

  气候测试.jpgScientists 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. Preceding the flood were two significant storms, record snow melt, saturated soils and particularly high groundwater.With GRACE data, the researchers found that they could have predicted the Missouri River floods months before current prediction models. 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.

  The research was published in the journal Nature Geoscience.

  Snow melt and major rain storms are predicted to increase with climate change. Which puts a premium on better flood prediction.

  Thanks for the minute for the Scientific American 60 Seconds Science. I'm Cynthia Graberc.

  中文翻译请点击下一页

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