Measuring Streamflow Through a Weir
Pew Creek below Johnson Road, Lawrenceville, Ga. The metal structure is a "V" weir. A sediment dam was built on either side of it to force the water through the weir. Scientists can calculate gallons per minute flow in the stream by timing how long the flow took to fill a bucket....
Location: Lawrenceville, GA, USA

Measurement of greenhouse gases from soil....
Location: Englewood, CO, USA

Student volunteer measuring soil moisture & greenhouse gases....
Location: Englewood, CO, USA

USGS volunteers learning about instruments used to measure wind and greenhouse gases in a mountain forest....
Location: Niwot Ridge, CO, USA

Measuring Tsunami Height
Dr. Starin Fernanda, Geological Survey & Mines Bureau of Sri Lanka, taking measurement of height of tsunami, indicated by gouge mark in tree from debris carried by the tsunami....
Location: Sri Lanka