Changes to Smith Island, MD and Tangier Island, VA, (Chesapeake Bay). thumbnail: http://svs.gsfc.nasa.gov/vis/a010000/a010700/a010753/Smith_Island_MD_ipod_sm_gal.png

Above the Earth, Below the Surface: Landsat’s Role in Monitoring Water Quality
Safeguarding freshwater resources is crucial, and while scientists use a variety of ground-based techniques to gauge water quality, the Landsat program has provided water quality data from orbit for decades.