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Temporal Trends And Origins Of Lake Erie Cadmium Contamination In Relation To Sediment Substrate Type Using Multivariate Kriging Analyses, Danielle E. Mitchell, K. Wayne Forsythe, Chris H. Marvin, Debbie A. Burniston

International Journal of Geospatial and Environmental Research

Using the kriging spatial interpolation method, Cd sediment contamination in Lake Erie from 1971 (263 samples) and 1997/1998 (55 samples) were mapped as continuous data surfaces. Although the most recent data set is two decades old, the roughly 25 year period between the two comprehensive lake-wide surveys represents a period of intense binational management action to reduce sources of contamination. To improve interpolation accuracy between two different sampling densities, auxiliary variables including lake-wide sediment substrate types were integrated into spatial analysis of Cd contamination patterns. The potential for adverse biological impacts posed by Cd sediment contamination to humans and aquatic …