Flood Measurement Instruments

 
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USGS stream gauging stations send information about stream and river levels directly to the NASA's GOES satellite. During river flooding measurements of water current speed are taken at different points on the river using a portable measurement instrument like this one.
   
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When it is too dangerous for hydrologists to get near the water, they use a land surveyor's measurement tool to ckeck the level of rising flood waters.
   
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