Michigan Water Science Center
DATA CENTERReal-time data WaterWatch
USGS in Your State
USGS Water Science Centers are located in each state.
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.
Remote Sensing - Reports/Fact Sheets
We are interested to learn how the data is being used. Please contact Lori Fuller at firstname.lastname@example.org 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:
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.
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Remote Sensing - Links
Remote Sensing of Water Resources — University of Minnesotahttp://water.umn.edu/index.html
LakeSat.org — Mapping Lake Clarity: About the Maphttp://www.lakesat.org/maptext1.php
LakeSat.org — Lake Water Clarity Monitoring and Analysis With Satellite Remote Sensing at the University of Wisconsin-Madisonhttp://www.lakesat.org/
Wisconsin Department of Natural Resources — Self-Help Citizen Lake Monitoring Networkhttp://dnr.wi.gov/lakes/CLMN/
Michigan Surface Water Information Management System (MiSWIMS)