High sediment loads in the Susquehanna River and Chesapeake Bay on September 13 2011, after Tropical Storm Lee doused the Mid-Atlantic. Wetter years, with high water flow and sediment loads from the Susquehanna River, support larger algal blooms in Chesapeake Bay, leading to low oxygen levels and dead zones. This image was taken by the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA's Terra satellite.