Measuring streamflow in fast moving floodwater.

Due to a lapse in appropriations, the majority of USGS websites may not be up to date and may not reflect current conditions. Websites displaying real-time data, such as Earthquake and Water and information needed for public health and safety will be updated with limited support. Additionally, USGS will not be able to respond to inquiries until appropriations are enacted.  For more information, please see

man in yellow slicker standing in rushing river up to his thighs, holding a stick-like instrument in the water

Detailed Description

USGS hydrographer measuring streamflow using a handheld Acoustic Doppler Velocimeter in fast moving floodwater Cajon Creek near Keenbrook, California. 


Image Dimensions: 576 x 1024

Date Taken:

Location Taken: Keenbrook, CA, US


USGS California Water Science Center