Robert W. Devaul 1970 Streams in the East River basin gain ground water throughout most of their reaches, however, ground-water pumping of the Green Bay - DePere area may reduce the water being gained by the streams from ground water. The August 13, 14 measurements were made during base-flow period when flow duration was about 50 to 55 percent (table 2). The August 28 measurements were made during a lower base-flow period when flow duration was about 70 to 80 percent. About 80 percent duration is more representative of low-flow conditions during the summer. application/pdf en Wisconsin Department of Natural Resources Base-flow study of East River basin Brown and Calumet counties, Wisconsin reports