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Fig. 2. The scatter plots of predicted and observed physical and chemical water properties (WPs) in combined lakes and streams in (A) an interpolation test, (B) an extrapolation test, (C) a lake-only interpolation test, and (D) a comparison of observed and interpolation variabilities. Water properties in A and B are made dimensionless by division by the mean USDA5 texture class WPs and in D by dividing by the overall mean WP. SIO2 = silica, TURB = turbidity, DOC = dissolved organic carbon, ANC = acid neutralizing capacity, N = total nitrogen, NO3 = nitrate, P = total phosphorus, CL = chloride
