“…Polluted sediments may be used as a proxy indicator of water quality (Forsythe et al, 2016a) and the overall health of aquatic ecosystems (Adams and Stadler-Salt, 2016). Since 2002, a group of scientists and academic researchers have mapped spatially interpolated sediment contamination values throughout many Great Lakes and tributaries (Forsythe et al, 2004;Forsythe et al, 2005;Forsythe and Marvin, 2009;Forsythe et al, 2010;Forsythe et al, 2013;Forsythe et al, 2015;Forsythe et al, 2016a;Forsythe et al, 2016b;Forsythe et al, 2016c;Gawedzki and Forsythe, 2012). The main objective of their research was to generate continuous data layers from sediment sample point data using the kriging spatial interpolation method (Forsythe et al, 2016a).…”