Figure 8.

Modeled and predicted E coli 4-log₁₀ removal distance representing the maximum transport distance on day 3 after the start of artificial pond filling. (a) 4-log₁₀ removal distance as a function of hydraulic anisotropy. The long-dashed line represents the fitted 4-log₁₀ E. coli removal distance based on the optimal anisotropy of 4. (b) Comparison of 4-log₁₀ E. coli removal distances between 2-D model (2 attachment mode) fitted to E. coli concentrations from the field and predictions made from substituting kinetic parameters derived from 2 population (best fit) 1-D column experiments into the calibrated 2-D flow model. The shaded areas represent the estimated uncertainty in each method. The uncertainty band for the 2-D model was obtained by substituting the range of possible values of k_a, k_d and k_i into the model (Table 2).