US Army Corps of Engineers
Portland District

Interactions between: Light attenuation and Secchi depth

Graph showing light attenuation vs. Secchi depthThe attenuation coeffient indicates the clarity of water relative to photosynthetically active radiation, which is required for plant growth.

Contact information

Ronald Thom, Ph.D
360-681-3657

Marine Research Operations, PNNL
1529 W. Sequim Bay Rd.
Sequim, WA 98382