Table 1.

Sensitivity analysis for K_h and anisotropy (K_h/K_v). Interaction parameters (k_a,k_d,k_i) were derived for Anisotropy=4, K_h=32.8 m/d. The lower and upper range of K_h was substituted into the model, while keeping k_a,k_d,k_i constant and the goodness of fit was calculated (RMSE). The same was done for horizontal dispersivity (λ).

	Kh=26.8m/d		Kh=32.8m/d	Kh=38.9m/d	λ=0.1m	λ=0.5m	λ=2.5m
Anisotropy	RMSE Hydraulic Heads (m)	RMSE E. coli (MPN/100 ml)
1	47.0
4	11.6	157	99	132	171	99	145
5	12.8
10	18.0
15	17.0