If you ever wonder how much of a problem sediment runoff pollution is for the Chesapeake Bay, check out this picture. This NASA satellite image was taken on March 17 after a heavy downpour. It shows a plume of muddy water extending from the Susquehanna River, at the extreme northern end of the Bay, and flowing far south, almost to the Virginia border. "This heavy Spring runoff has resulted in record low water clarity for the month of March in may areas of Maryland’s portion of the Chesapeake Bay," the Department of Natural Resources reports. The river of murky silt and pollutants in this photo makes a powerful visual argument for smarter land-use policies that minimize suburban sprawl, parking lots and other impervious surfaces; and encourage better stormwater management systems in urban areas; as well as better runoff control practices on fields, such as the planting of buffer strips of trees and grasses to filter streams. To learn more and see more pictures, visit this Maryland Department of Natural Resources website.