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Georgia Water Science Center

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Picture of a combined sewage overflow outflow point during Sept. 2009 flooding in Atlanta, Georgia.



Small Watershed Studies at the Panola Mountain Research Watershed project home page. Home



USGS Water Science Centers are located in each state.

There is a USGS Water Science Center office in each State. Washington Oregon California Idaho Nevada Montana Wyoming Utah Colorado Arizona New Mexico North Dakota South Dakota Nebraska Kansas Oklahoma Texas Minnesota Iowa Missouri Arkansas Louisiana Wisconsin Illinois Mississippi Michigan Indiana Ohio Kentucky Tennessee Alabama Pennsylvania West Virginia Georgia Florida Caribbean Alaska Hawaii New York Vermont New Hampshire Maine Massachusetts South Carolina North Carolina Rhode Island Virginia Connecticut New Jersey Maryland-Delaware-D.C.

September 2009 Flooding
Crooked Creek at Norcross (02335350)

Hydrologic information for this site Hydrologic information for this site.

Georgia Water Science Center hydrographers manually measuring streamflow. The crane holds a heavy weight and a "current meter", which has vanes that spin in the water current. The scientist counts the spins to measure a velocity reading of the water. By doing this at a number of points both vertically and horizontally across the stream, a "discharge measurement" is completed that gives the streamflow, which is the amount, in cubic feet per second, of water flowing at the time of measurement. The streamflow is measured at the current "gage height", which is the height, in feet, of the stream above a certain point.

Georgia Water Science Center hydrologists measuring streamflow.
Credit: USGS

Georgia Water Science Center hydrologists measuring the stage of the water. The metal box holds a wire attached to a weight, which is used to make a quick measurement of stream stage, or gage height. The scientist lowers a weight from the box until the bottom of the weight just touches the water to make a measurement.

Georgia Water Science Center hydrologists measuring streamflow.
Credit: USGS

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Page Last Modified: Tuesday, 04-Feb-2014 08:04:41 EST