USGS - science for a changing world

Michigan Water Science Center

Project Chief

Lori Fuller



Click here to go to USGS Current Water Data for Michigan
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Real-time data Historical data WaterWatch

Estimating Lake Water Clarity Overview

A technique was developed by USGS, modeled after Olmanson and others (2001), to estimate Secchi-disk transparency (eSDT) and corresponding estimated trophic state index (eTSI) values based on the Carlson's Trophic State Index (TSI) in inland lakes greater than 20 acres using Landsat satellite imagery.

Michigan Lake Water Clarity Interactive Map Viewer

Michigan Lake Water Clarity Interactive Map Viewer (Currently offline)

Available online are estimated Secchi-disk transparency (eSDT) and corresponding estimated trophic state index (eTSI) values for Michigan inland lakes. To view available eSDT for Michigan inland lakes greater than 20 acres without interference from clouds, cloud shadows, dense vegetation or shoreline, go to the Michigan Lake Water Clarity Interactive Map Viewer. (Currently offline)

* The Michigan Lake Water Clarity Interactive Map Viewer was updated with additional eSDT data January, 2016.

Remote Sensing - Reports/Fact Sheets

SIR2016-5023 USGS SIR2011-5007 publication cover image USGS FS 2007-3022 Publication cover image USGS SIR 2004-5086 Publication cover image
Scientific Investigations Report 2016-5023 Scientific Investigations Report 2011–5007 Fact Sheet 2007–3022 Scientific Investigations Report 2004–5086

Downloadable Data/MetaData

We are interested to learn how the data is being used. Please contact Lori Fuller with your information and project.

Estimated Secchi-disk transparency (eSDT) and corresponding estimated trophic state index (eTSI) values.  Data is available for download in shapefile format with metadata:

1999-2000 eSDT — shapefile metadata

2002 eSDT — shapefile metadata
2003-2005 eSDT — shapefile metadata
2007-2008 eSDT — shapefile metadata
2009-2010 eSDT — shapefile metadata
2011 eSDT — shapefile metadata

2013 eSDT — shapefile metadata

Shapefiles of the distributions are contained in a ZIP file (.ZIP). Microsoft® Windows® 7 and up have a built-in programs that allows a file or folder to be compressed or uncompressed. You can also use WinZip®, PKZip®, or similar program to extract in Microsoft® Windows®; use Stuffit Expander™ or similar to unzip on Macintosh; Use UnZip or similar program to extract on UNIX® computers.

NOTICE: Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Federal Government.

"Microsoft and Windows are either registered trademarks or trademarks of Microsoft Corporation in the United States and/or other countries."
"WinZip is a registered Trademark of WinZip International LLC"
"PKZIP is a registered trademarks of PKWARE, Inc."
"StuffIt Expander is a trademark of Smith Micro Software, Inc."
"UNIX is a registered trademark of The Open Group."

All other trademarks and trade names are the property of their respective owners.

Remote Sensing - Links

Remote Sensing of Water Resources — University of Minnesota — Mapping Lake Clarity: About the Map — Lake Water Clarity Monitoring and Analysis With Satellite Remote Sensing at the University of Wisconsin-Madison

Wisconsin Department of Natural Resources — Self-Help Citizen Lake Monitoring Network

Michigan Surface Water Information Management System (MiSWIMS)
Interactive map-based system that allows users to view information about Michigan’s surface water

Point of Contact

Comments about this site can be sent to Lori Fuller.

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Page Last Modified: Wednesday, 26-Dec-2012 17:58:46 EST