• Wizard Island

    Crater Lake

    National Park Oregon

Research Equipment Used in Crater Lake

 
ctd

A CTD sensor package.

NPS

The CTD Profiler is a continuous water quality sensor that is lowered from the boat to the lake bottom at 580 meters. The CTD measures water temperature, depth, salinity, particle density, and chlorophyll concentration.

 
secchi disk

A Secchi Disk in Crater Lake.

NPS

The Secchi Disk is a flat plate that is lowered into the water column from a boat. The secchi disk is used world-wide as a quick and reliable indicator of the clarity of a lake.

 
van dorn out of water

A Van Dorn water sampler being lowered into Crater Lake.

NPS

The Van Dorn is a water sampler that is lowered into Crater Lake. Multiple Van Dorns collect water samples from eleven depths during July, August, and September.

 
sediment trap on boat

A sediment trap being readied for sampling in Crater Lake.

NPS

A sediment trap has collected falling particles in Crater Lake for thirty years. The sediment trap was last used during the summer of 2013.

 
weather buoy

The weather buoy at Crater Lake.

NPS

A floating weather station has been collecting information since 1992.

Did You Know?

Visitors viewing Crater Lake from the Sinnott Memorial.

An average of 482,000 people visit Crater Lake National Park each year. Open year-round, less than 100,000 people visit the park during the non-summer months.