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Real time Streamflow Data

Provided by USGS, there are hundreds of sensors in this data set which tracks short-term changes (over several hours) in rivers and streams. The colors represent real-time streamflow compared to percentiles of historical daily streamflow for the day of the year. There is a legend explaining the colors, and you can click on the placemarks for more details. You can zoom down to each placemark and see where they are located in the satellite photos of Google Earth.

From: Google Earth Blog and WaterWatch (