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

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


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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: College Lower (13-14), General Public, High School (9-12), Middle (6-8)
Theme: Teach the Earth:Course Topics:Hydrology/Hydrogeology, Sedimentary Geology, Teach the Earth:Teaching Topics:Water, Teach the Earth:Enhancing your Teaching:Teaching in the Field, Teach the Earth:Course Topics:Ecology
Topics: Biosphere:Ecology:Habitats:Freshwater, Hydrosphere/Cryosphere:Surface Water:Water Quality/Chemistry, Earth surface:Sedimentary Geology:Sediment Transport and Deposition, Biosphere:Ecology:Habitats:Water Column, Biosphere:EcologyKeywords: Turbidity, total suspended solids, TSS