Unified Interior Regions
Sprague River Basin, Oregon
Region 9: Columbia-Pacific Northwest
Regions L2 Landing Page Tabs
Testing bathymetric equipment at Coldwater Lake, Mount St. Helens
Adam Mosbrucker tests equipment (Acoustic Doppler Current Profiler, survey-grade RTK-GPS and a map-grade GPS) in preparation for a lake bottom survey.
A bathymetric contour map of Castle Lake, Mount St. Helens.
Researchers map the bottom of Castle Lake, near Mount St. Helens. For three days, researchers ran a small boat over the lake surface equipped with an acoustic Doppler current profiler (ADCP). The ADCP bounces an acoustic wave off the bottom that is reflected back to a mobile receiver in the boat. The frequencies of the send-receive pairs are used to calculate depth. More
...Mount St. Helens 2014 Teacher Workshop
Mount St. Helens 2014 Teacher Workshop