Percentage of annual days that river stage exceeds 'open river' conditions for lock and dams on the Upper Mississippi River, 1985-2015
U.S. Army Corps of Engineers river stage and discharge data (www.rivergages.com) were used to calculate longitudinal connectivity, which is represented by the number of days each lock and dam is in “open river” conditions. During high water conditions, dam gates are generally lifted out of the water or lowered to the …