The water in the Chesapeake is not as clear as water in a swimming pool.  What makes it murkier and how can we measure this difference?

Printables:

Secchi Depth Text

Secchi Depth Visual Aid

Additional Links:

A description of a Secchi Disk.

https://www.nalms.org/secchidipin/monitoring-methods/the-secchi-disk/what-is-a-secchi-disk/

The USGS provides important information about turbidity, which is what a secchi disk measures.

https://www.usgs.gov/special-topic/water-science-school/science/turbidity-and-water?qt-science_center_objects=0#qt-science_center_objects

A quick article about how the Secchi Disk evolved over time.

https://www.nalms.org/secchidipin/monitoring-methods/the-secchi-disk/why-a-black-and-white-secchi-disk/