The Secchi Disk
http://www.secchidipin.org/secchi.htm

Great North American Secchi Dip-In, Kent State University Department of Biological Sciences


This Great North American Secchi Dip-In website offers a comprehensive guide to Secchi disk use. It features links to a series of pages that answer questions such as: what is a Secchi disk; what (or who) is Secchi; and why are Secchi disks black and white. The links also include information such as considerations in Secchi disk design and procedure, monitoring methods, and evaluating eutrophication by Secchi depth.

This resource is referenced here:
Subject: Biology:Ecology:Metabolism, Biology, :Ecology:Habitats:Water Column, Geoscience:Geology:Sedimentary Geology:Sediment Transport and Deposition, Geoscience:Hydrology:Surface Water:Water Quality/Chemistry
Resource Type: Activities:Lab Activity, Field Activity
Special Interest: Field-Based Teaching and Learning
Grade Level: General Public, High School (9-12), College Lower (13-14), Middle (6-8)
Topics: Biosphere:Ecology:Habitats:Freshwater, Biosphere:Ecology, Earth surface:Sedimentary Geology:Sediment Transport and Deposition, Hydrosphere/Cryosphere:Surface Water:Water Quality/Chemistry, Biosphere:Ecology:Habitats:Water ColumnKeywords: Turbidity, total suspended solids, TSS