

Heartland Coalition scientists also have several additional "roving" sondes which they can move and place at various locations along the river. For example, during the summer 2009, sondes were deployed below Sunbury to examine mixing and water chemistry variability downstream of the North and West Branches.
At other times, these roving sondes can be moved to other reaches to monitoring downstream trends in total dissolved solids, turbity, dissolved oxygen, and temperature. This kind of information is needed by scientists to determine the temporal and spatial variability of the Susquehanna RIver and assess